CN114688591A - Central range hood system and control method and control device thereof - Google Patents

Central range hood system and control method and control device thereof Download PDF

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Publication number
CN114688591A
CN114688591A CN202210304763.XA CN202210304763A CN114688591A CN 114688591 A CN114688591 A CN 114688591A CN 202210304763 A CN202210304763 A CN 202210304763A CN 114688591 A CN114688591 A CN 114688591A
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China
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target
power distribution
distribution valve
air exhaust
resistance value
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CN202210304763.XA
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CN114688591B (en
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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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    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Abstract

The invention discloses a central range hood system and a control method and a control device thereof. The control method comprises the steps of determining the maximum air exhaust resistance value of the starting-up terminal according to current working condition information, determining the target opening of the power distribution valve corresponding to each starting-up terminal according to the maximum air exhaust resistance value, determining the target resistance coefficient of the power distribution valve corresponding to each starting-up terminal according to the maximum air exhaust resistance value when the maximum air exhaust resistance value is larger than 0, and increasing the gear of the starting-up terminal when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset howling opening. According to the central range hood system, the control method and the control device provided by the embodiment of the invention, when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree, the gear of the starting terminal is adjusted, so that the target resistance coefficient required to be provided by the power distribution valve is reduced, the target opening degree of the power distribution valve is increased, and the squeal noise is reduced.

Description

Central range hood system and control method and control device 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 and a control device 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, a control method and a control device 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 present invention, a control method for a central range hood system is provided, the control method is applied to the central range hood system, the central range hood system includes a common flue, and a power distribution valve and a terminal machine located on each floor, the terminal machine on each floor is connected with the common flue through the power distribution valve, and the control method includes:
s1, obtaining current working condition information, wherein the working condition information comprises the number of the starting terminal machines, the target air exhausting quantity of the starting terminal machines and the gear positions of the starting 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 of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value;
s4, controlling the power distribution valve to execute the target opening degree;
wherein, according to the maximum air exhaust resistance value, determining the target opening of the power distribution valve corresponding to each starting terminal machine comprises:
when the maximum air exhaust resistance value is larger than 0, determining a target resistance coefficient of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value;
when the target resistance coefficient is smaller than or equal to the resistance coefficient of the power distribution valve under the preset squeaking opening degree, determining the target opening degree of the power distribution valve according to the target resistance coefficient;
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve at the preset squeal opening degree, increasing the gear of the starting terminal, and repeating the steps S2 and S3.
Optionally, determining a target opening of the power distribution valve corresponding to each terminal machine to be started according to the maximum air discharge resistance value, further comprising:
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree and the gear of the starting terminal machine is the preset maximum gear, reducing the target air exhaust volume of the starting terminal machine, and repeating the steps S2 and S3.
Optionally, determining a target opening of the power distribution valve corresponding to each terminal machine to be started according to the maximum air discharge resistance value, further comprising:
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under a preset squeal opening degree, the gear of the starting terminal machine is a preset maximum gear, and the target air exhaust volume of the starting terminal machine is a preset minimum air exhaust volume, determining the preset squeal opening degree as the target opening degree of the power distribution valve.
Optionally, determining a target opening of the power distribution valve corresponding to each terminal machine to be started according to the maximum air discharge resistance value, further comprising:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target opening of the power distribution valve corresponding to the starting terminal machine is 90 degrees.
Optionally, determining the maximum air discharge resistance value of the terminal machine according to the current working condition information includes:
determining the air exhaust resistance value of each starting terminal according to the current working condition information;
and determining the maximum air exhaust resistance value as the maximum air exhaust resistance value.
Optionally, determining a target resistance coefficient of the power distribution valve corresponding to each terminal machine to be started according to the maximum air exhaust resistance value includes:
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 the power distribution valve corresponding to the starting terminal machine according to the resistance difference.
Optionally, the central range hood system further includes a host, and the host is located in the common flue;
after determining the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information, the method further comprises the following steps:
determining the target running state of the host according to the maximum air exhaust resistance value and the current working condition information;
controlling the host to operate in the target operation state;
determining a target operation state of the host according to the maximum air exhaust resistance value and the current working condition information, wherein the method comprises the following steps:
when the maximum air exhaust resistance value is less than or equal to 0, determining that the target running state of the host 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 host machine is an opening state.
Optionally, determining a target operation state of the host according to the maximum air discharge resistance value and the current working condition information, further comprising:
when the maximum air exhaust resistance value is larger than 0, determining working point information of the host according to the maximum air exhaust resistance value and the current working condition information, wherein the working point information comprises an air volume value and an air pressure value of the host at a working point;
determining the target operating frequency of the host according to the operating point information;
controlling the host to operate in the target operating state, further comprising:
and controlling the host to operate at the target operating frequency.
According to another aspect of the present invention, there is provided a control device for a central extractor hood system, the control device being applied to the central extractor hood system, the central extractor hood system including a common flue, and a power distribution valve and a terminal set located on each floor, the terminal set on each floor being connected to the common flue through the power distribution valve, the control device including:
the system comprises a working condition information acquisition module, a starting terminal and a starting terminal control module, wherein the working condition information acquisition module is used for acquiring current working condition information, and the working condition information comprises the number of the starting terminals, the target air exhaust volume of the starting terminals and the gears of the starting terminals;
the maximum air exhaust resistance value determining module is used for determining the maximum air exhaust resistance value of the starting terminal according to the current working condition information;
the target opening determining module is used for determining the target opening of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value;
the control module is used for controlling the power distribution valve to execute the target opening degree;
wherein the target opening degree determination module includes:
a target resistance coefficient determining unit, configured to determine, when the maximum air discharge resistance value is greater than 0, a target resistance coefficient of the power distribution valve corresponding to each of the startup terminals according to the maximum air discharge resistance value;
the target opening determining unit is used for determining the target opening of the power distribution valve according to the target resistance coefficient when the target resistance coefficient is smaller than or equal to the resistance coefficient of the power distribution valve under the preset squeal opening;
and the gear adjusting unit is used for increasing the gear of the starting terminal machine when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree.
According to another aspect of the invention, a central range hood system is provided, which comprises a common flue, and a power distribution valve and a terminal machine which are positioned on each floor, wherein the terminal machine on each floor is connected with the common flue through the power distribution valve;
the central range hood system also comprises a control device of the central range hood system;
and the power distribution valve is respectively in communication connection with the corresponding terminal machine and the control device of the central range hood system.
The central range hood system, the control method and the control device thereof provided by the embodiment of the invention determine the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information, determine the target opening of the power distribution valve corresponding to each starting terminal machine according to the maximum air exhaust resistance value, perform resistance adjustment through the power distribution valve of each floor, properly increase the air exhaust resistance of the terminal machine positioned at the high floor position, and enable the air exhaust resistance value of each floor to approach the maximum air exhaust resistance value, thereby realizing the relative balance of the air exhaust volume of the starting terminal machines of different floors. When the maximum air exhaust resistance value is larger than 0, the target resistance coefficient of a power distribution valve corresponding to each starting terminal is determined according to the maximum air exhaust resistance value, and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening, the wind pressure provided by a built-in air exhaust motor of the starting terminal is improved by improving the gear of the starting terminal, so that the air exhaust resistance required to be overcome when the starting terminal reaches the target air exhaust amount is reduced, the target resistance coefficient required to be provided by the power distribution valve is further reduced, the target opening of the power distribution valve is increased, and the squeal noise is reduced.
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 required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a control method of a central range hood system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a central extractor 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 a host 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;
fig. 7 is a schematic structural diagram of another control method for a central range hood system according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another control method for a central extractor hood system according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another control method of a central extractor hood system according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another control method of a central extractor hood system according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a control device of a central extractor hood system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the terms "target" and the like in the description and claims of the present invention and in the above-described drawings 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. Moreover, 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 flow chart of a control method of a central extractor hood system according to an embodiment of the present invention, which is applicable to the central extractor hood system in this embodiment. The control method of the central extractor hood system provided by the embodiment of the invention can be executed by a control device in the central extractor hood system, the control device can be realized in a hardware and/or software form, and for example, the control device can be configured in a controller of the central extractor hood system.
Specifically, fig. 2 is a schematic structural diagram of a central extractor hood system according to an embodiment of the present invention, and as shown in fig. 2, the central extractor hood system includes a common flue 10, and a power distribution valve 11 and a terminal 12 located on each floor, and the terminal 12 on each floor is connected to the common flue 10 through the power distribution valve 11.
As shown in fig. 2, the terminal 12 is an exhaust device such as a range hood or an integrated kitchen with a built-in exhaust motor, and the terminal 12 can be installed in a kitchen of each floor.
A power distribution valve 11 may be installed at an interface between an outlet of an exhaust duct of the terminal 12 and an inlet of the common flue 10, and the power distribution valve 11 is a device for adjusting an exhaust amount of the terminal 12. The power distribution valve 11 can be composed of a valve plate angle control module and a communication module, the valve plate angle control module can control the rotation of a motor to open and close the valve plate and can control the opening angle of the valve plate; the communication module can realize the wireless communication function.
Illustratively, as shown in FIG. 2, a top floor FNTerminal 12 through the top tower FNIs connected to the common flue 10, floor FN-1Terminal 12 through floor FN-1The power distribution valve 11 is connected with a common flue 10, … …, floor 1F1Terminal 12 through first floor F1Is connected to the common flue 10.
Optionally, the central range hood system further includes a control device (not shown in the figure), and the control device is respectively connected to the top floor FN Power distribution valve 11, floor FN-1 Power distribution valve 11, … …, floor 1F1Is communicatively connected to the power distribution valve 11.
With continuing reference to fig. 1, the method for controlling the central range hood system provided by the present invention comprises:
and S1, acquiring current working condition information, wherein the working condition information comprises the number of the starting terminal machines, the target air exhaust volume of the starting terminal machines and the gear positions of the starting terminal machines.
The working condition information refers to working state information, the working condition information includes the number of the terminal machines which are started, and the terminal machines which are started are terminal machines which are in an open state.
In this embodiment, the control device of the central extractor hood system may obtain the operating condition information sent by the power distribution valve of each floor, and calculate the number of the terminal machines 12 in the open state according to the operating condition information of each floor.
Specifically, as shown in fig. 2, the power distribution valves 11 installed in the kitchens of the same common flue 10 on the respective floors may be numbered to extend from floor 1F1Begin numbering in sequence until the top floor FN。
Meanwhile, the control device of the central range hood system can be networked with the power distribution valves 11 of all the floors, so that real-time communication between the control device and the power distribution valves 11 of all the floors is realized, and the startup and shutdown signals of all the terminal machines 12 are obtained.
Specifically, the power distribution valve 11 of each floor detects a power on/off signal of the terminal 12 in real time, and when the power on signal of the terminal 12 is detected, the power distribution valve 11 broadcasts the power on signal to the networking system, so that the control device in the networking system obtains the power on signal, and the control device calculates the number of the started terminals according to the power on signal sent by the power distribution valve 11 of each floor.
In addition, the power distribution valve 11 will also send the target air exhaust amount and gear position of the start-up terminal machine to the control device.
The central range hood system can preset a plurality of effective air exhaust volumes and a plurality of gears 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 discharge 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.
Optionally, the terminal machine may have a built-in exhaust motor, and the terminal machine may have three gears of low, medium and high, and the corresponding gears are respectively X1 low gear, X2 medium gear and X3 high gear. 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 effective air discharge volumes and 3 gears of the terminal are preset as an example, but not limited to this, a person skilled in the art can set the number of the preset effective air discharge volumes and gears according to actual needs, and in general, the terminal can be preset to have 3 to 4 effective air discharge volumes, and the terminal can include 3 to 4 gears.
And S2, determining the maximum air exhaust resistance value of the terminal machine according to the current working condition information.
Specifically, the amount m of the terminal equipment and the target exhaust volume (the initial default value is the effective exhaust volume Q) of the terminal equipment can be determined according to the number m of the terminal equipmentZ1) The power performance curve P of the terminal machine at the current gear (the initial default gear is X1 low gear)x＝fx(Q) calculating the maximum air discharge resistance value delta P when the starting terminal machine of each floor reaches the target air discharge quantitymaxWherein the maximum air discharge resistance value delta PmaxThe maximum air exhaust resistance is the maximum air exhaust resistance which needs to be overcome when the starting terminal machine of each floor reaches the target air exhaust amount.
Wherein the dynamic performance curve Px＝fx(Q) is a relationship curve of wind pressure and wind volume of the built-in exhaust motor of the terminal, exemplarily, fig. 3 is a schematic diagram of a power performance curve of the terminal according to the embodiment of the present invention, as shown in fig. 3, the user sits on his/her seatThe symbol Q represents the air volume, the ordinate P represents the wind pressure, and the terminal corresponds to different power performance curves under different gears (X1 low gear, X2 medium gear and X3 high gear).
It should be noted that, because the public flue 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 exhaust resistance that the low-floor start-up terminal needs to overcome when reaching the target air exhaust volume is usually greater than the air exhaust resistance that the high-floor start-up terminal needs to overcome when reaching the target air exhaust volume, therefore, the air exhaust resistance value of the start-up terminal at the bottom floor can be directly calculated as the maximum air exhaust resistance value Δ PmaxThereby contributing to a reduction in the amount of calculation, but is not limited thereto.
Further, the maximum air discharge resistance value delta PmaxAnd also with respect to the total number of floors N, the height of the floors h, the roughness k of the common flue, and the cross-sectional area S of the common flue, so that, in order to make the calculation more accurate, the embodiment may also acquire the above information and combine the same to determine the maximum exhaust resistance value Δ Pmax。
And S3, determining the target opening of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value.
As described above, since the air discharge resistance of the high floor is smaller than that 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 power distribution valve corresponding to the start-up terminal of each floor is determined based on the maximum air discharge resistance value, the resistance adjustment is carried out through the power distribution valve of each floor, the air exhaust quantity adjustment of the starting terminal machine of each floor is realized, wherein the target opening degrees of the power distribution valves of different floors are different, the target opening degree of the power distribution valve of a high floor is smaller, the target opening degree of the power distribution valve of a low floor is larger, the air exhaust resistance of the terminal machine positioned at the high floor position is properly increased, so that 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 machine of different floors is realized.
The opening degree refers to an opening angle of the power distribution valve.
And S4, controlling the power distribution valve to execute the target opening degree.
The power distribution valves of all floors are controlled to execute the target opening, so that the power distribution valves of all floors provide proper resistance coefficients, the air exhaust resistance of the terminal machines positioned at the high floors is increased, the air exhaust resistance value of all floors approaches to the maximum air exhaust resistance value, and the relative balance of the air exhaust amount of the starting terminal machines of different floors is realized.
Further, according to the maximum air exhaust resistance value, determining the target opening degree of the power distribution valve corresponding to each starting terminal, comprising:
and when the maximum air exhaust resistance value is larger than 0, determining the target resistance coefficient of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value.
And when the target resistance coefficient is smaller than or equal to the resistance coefficient of the power distribution valve under the preset squeal opening degree, determining the target opening degree of the power distribution valve according to the target resistance coefficient.
And when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree, increasing the gear of the starting terminal, and repeating the steps S2 and S3.
Specifically, when the maximum air discharge resistance value is Δ PmaxWhen the exhaust air volume of the starting terminal machine of each floor reaches the target exhaust air volume, the required overcome exhaust air resistance is a positive value, the required overcome exhaust air resistance of the low floor is larger than the required overcome exhaust air resistance of the high floor, at the moment, the target resistance coefficient of the power distribution valve corresponding to each starting terminal machine is determined according to the maximum exhaust air resistance value, so that the power distribution valve of the high floor provides a certain resistance coefficient, the exhaust air resistance of the high floor is increased, the exhaust air resistance value of the high floor approaches to the maximum exhaust air resistance value, and the relative balance of the exhaust air volume of the starting terminal machines of different floors is realized.
It is understood that the smaller the opening degree of the power distribution valve, the larger the resistance coefficient that can be provided, and when the opening degree of the power distribution valve is less than a certain threshold value, squeal may occur at a set exhaust air amount, and the threshold value may be set to a preset squeal opening degree, and when the opening degree of the power distribution valve is greater than or equal to the preset squeal opening degree, squeal may not occur, and when the opening degree of the power distribution valve is less than the preset squeal opening degree, squeal may occur.
The preset squeaking opening degree may be set to 45 °, but is not limited thereto, and the preset squeaking opening degree may be measured through experiments, which is not limited in this embodiment of the present invention.
When the calculated target resistance coefficient is smaller than or equal to the resistance coefficient of the power distribution valve under the preset squeal opening degree, it is indicated that the resistance coefficient required to be provided by the power distribution valve of the floor is smaller than the resistance coefficient of the power distribution valve under the preset squeal opening degree, namely the opening degree of the power distribution valve of the floor when the power distribution valve reaches the target resistance coefficient is larger than the preset squeal opening degree, at the moment, the target opening degree of the power distribution valve can be directly determined according to the target resistance coefficient, the obtained target opening degree is larger than the preset squeal opening degree, and the power distribution valve cannot generate squeal.
Wherein, the opening-resistance characteristic relation f (xi) of the power distribution valve of each floor can be usedixθ) calculating a target opening θ of the power distribution valveiFor 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 power distribution valve can be found from the resistance coefficient as the target opening degree θi。
Further, when the target resistance coefficient is greater than the resistance coefficient of the power distribution valve at the preset squealing opening, if the target resistance coefficient is provided by the power distribution valve, the target opening is smaller than the preset squealing opening to generate squealing, at this time, the gear of the starting terminal is increased, and the steps of S2 and S3 are repeated, namely, the target air discharge quantity of the starting terminal (the initial default value is the effective air discharge quantity Q) is re-determined according to the number m of the starting terminalsZ1) Dynamic property of terminal machine at current gear (improved gear)Energy curve Px＝fx(Q) calculating the maximum air discharge resistance value delta P when the starting terminal machine of each floor reaches the target air discharge quantitymaxAccording to the new maximum air discharge resistance value delta PmaxAnd re-determining the target opening degree of the power distribution valve corresponding to each starting terminal.
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 power distribution valve is further reduced, the target opening degree of the power distribution valve is increased, and the squeaking noise is favorably reduced.
It should be noted that, after the gear of the start-up terminal is increased, the target resistance coefficient required to be provided by the power distribution valve is still greater than the resistance coefficient of the power distribution valve at the preset squeal opening degree, the gear of the start-up terminal can be continuously increased until the target resistance coefficient is less than or equal to the resistance coefficient of the power distribution valve at the preset squeal opening degree, so that the target opening degree of the power distribution valve can be directly determined according to the target resistance coefficient, and the obtained target opening degree is greater than the preset squeal opening degree, so that the power distribution valve does not generate squeal.
In summary, the control method of the central range hood system according to the embodiment of the present invention determines the maximum air exhaust resistance value of the start-up terminal according to the current working condition information, and determines the target opening of the power distribution valve corresponding to each start-up terminal according to the maximum air exhaust resistance value, so as to perform resistance adjustment through the power distribution valves of each floor, and appropriately increase the air exhaust resistance of the terminal located at the high floor, so that the air exhaust resistance values of each floor approach to the maximum air exhaust resistance value, thereby implementing relative balance of the air exhaust volume of the start-up terminals of different floors. When the maximum air exhaust resistance value is larger than 0, the target resistance coefficient of a power distribution valve corresponding to each starting terminal is determined according to the maximum air exhaust resistance value, and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening, the wind pressure provided by a built-in air exhaust motor of the starting terminal is improved by improving the gear of the starting terminal, so that the air exhaust resistance required to be overcome when the starting terminal reaches the target air exhaust amount is reduced, the target resistance coefficient required to be provided by the power distribution valve is further reduced, the target opening of the power distribution valve is increased, and the squeal noise is reduced.
Optionally, determining a target opening of the power distribution valve corresponding to each terminal machine according to the maximum air exhaust resistance value, further comprising:
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree and the gear of the starting terminal machine is the preset maximum gear, reducing the target air exhaust volume of the starting terminal machine, and repeating the steps S2 and S3.
The terminal machine may have a plurality of gears, and the preset maximum gear is the maximum gear of the terminal machine, for example, taking the terminal machine as a low gear, a medium gear and a high gear, the corresponding gears are X1 low gear, X2 medium gear and X3 high gear respectively, and X3 high gear is the preset maximum gear of the terminal machine.
In this embodiment, when the gear of the terminal is the preset maximum gear, the frequency of the built-in exhaust motor reaches the maximum, the provided wind pressure reaches the maximum, if the target resistance coefficient is still greater than the resistance coefficient of the power distribution valve at the preset squeal opening, the target exhaust air volume of the terminal is reduced, and the above S2 and S3 are repeated, that is, the number m of the terminal, the target exhaust air volume of the terminal (the reduced target exhaust air volume), and the power performance curve P of the terminal at the current gear (the preset maximum gear) are re-determined according to the number m of the terminal, the target exhaust air volume of the terminal, and the power performance curve P of the terminal at the current gear (the preset maximum gear)x＝fx(Q) calculating the maximum air discharge resistance value delta P of the starting terminal machine of each floor when the current target air discharge quantity is reachedmaxAccording to the new maximum air discharge resistance value delta PmaxAnd re-determining the target opening degree of the power distribution valve corresponding to each starting terminal.
The target air exhaust volume of the starting terminal machine is reduced, the air exhaust resistance required to be overcome when the starting terminal machine reaches the target air exhaust volume can be reduced, the target resistance coefficient required to be provided by the power distribution valve is further reduced, the target opening degree of the power distribution valve is increased, and the howling noise can be reduced.
It should be noted that, after the target air discharge amount of the power distribution valve is reduced, the target resistance coefficient required to be provided by the power distribution valve is still greater than the resistance coefficient of the power distribution valve at the preset squeal opening degree, the target air discharge amount of the power distribution valve can be continuously reduced until the target resistance coefficient is less than or equal to the resistance coefficient of the power distribution valve at the preset squeal opening degree, so that the target opening degree of the power distribution valve can be directly determined according to the target resistance coefficient, and the obtained target opening degree is greater than the preset squeal opening degree, so that the power distribution valve does not generate squeal.
Optionally, determining a target opening of the power distribution valve corresponding to each terminal machine according to the maximum air exhaust resistance value, further comprising:
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening, the gear of the starting terminal machine is a preset maximum gear, and the target air exhaust volume of the starting terminal machine is a preset minimum air exhaust volume, determining the preset squeal opening as the target opening of the power distribution valve.
Wherein, a plurality of effective air discharge volume can be predetermine to central range hood system, predetermines minimum effective air discharge volume for the minimum, for example, predetermine the effective air discharge volume of three terminating machines with central range hood system: qZ1、QZ2And QZ3And Q isZ1＞QZ2＞QZ3For example, QZ3The minimum air discharge quantity is preset.
In this embodiment, when the gear of the terminal is the preset maximum gear and the target air discharge amount of the terminal is the preset minimum air discharge amount, the target air discharge amount of the terminal cannot be reduced any more, otherwise, the required air discharge effect cannot be achieved, and if the target resistance coefficient is still greater than the resistance coefficient of the power distribution valve at the preset howling opening, the target opening of the power distribution valve, at which the target resistance coefficient is greater than the resistance coefficient of the power distribution valve at the preset howling opening, is set to the preset howling opening, so that the power distribution valve does not generate howling.
The power distribution valve is opened to a preset opening degree, and the power distribution valve is opened to a preset opening degree.
Optionally, determining a target opening of the power distribution valve corresponding to each terminal machine according to the maximum air exhaust resistance value, further comprising:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target opening of the power distribution valve corresponding to the starting terminal machine 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, and at the moment, the target opening degree of the power distribution valve corresponding to the starting terminal machine is determined to be 90 degrees so as to completely open the power distribution valve, so that the power distribution valve is prevented from providing a resistance coefficient to reduce the air exhaust volume, and the reduction of power consumption is facilitated.
Optionally, the maximum air discharge resistance value of the terminal machine of starting up is determined according to the current working condition information, including:
and determining the air exhaust resistance value of each starting terminal according to the current working condition information.
And determining the maximum air exhaust resistance value as the maximum air exhaust resistance value.
Wherein, the starting terminal machine can be started according to the number m of the starting terminal machine and the target exhaust volume (the initial default value is the effective exhaust volume Q)Z1) The power performance curve P of the terminal machine at the current gear (the initial default gear is X1 low gear)x＝fx(Q) calculating an air discharge resistance value delta P of each terminaliDetermining the maximum air exhaust resistance value delta P corresponding to the starting terminal with the maximum air exhaust resistance valuemax。
Furthermore, the air exhaust resistance value delta P of each starting terminal machineiAnd the number of the total floors N, the height h of the floors, the roughness k of the public flue and the cross-sectional area S of the public flue, therefore, in order to make the calculation more accurate, the embodiment can also be based on the starting number m of the starting terminal machine and the target exhaust volume (the initial default value is the effective exhaust volume Q)Z1) The total floor number N, the floor height h, the roughness k of a public flue, and the power performance of the terminal machine at the current gear (the initial default gear is X1 low gear)Curve Px＝fx(Q) and the cross-sectional area S of the public flue, and calculating the target exhaust air volume (the initial default value is the effective exhaust air volume Q) of the starting terminal machine of each floorZ1) Hourly exhaust resistance value delta Pi＝f(f(Qz1)，S，Qz1N, k, m, h) and determining the maximum value of exhaust resistance Δ PiIs the maximum air exhaust resistance value delta Pmax。
The common flue has the pressure distribution characteristics of large bottom backpressure and small top backpressure, so that the air exhaust resistance of the starting terminal machine at the low floor is larger than the air exhaust resistance of the starting terminal machine at the high floor when the starting terminal machine reaches the target air exhaust volume under normal conditions, and the air exhaust resistance value of the starting terminal machine at the bottommost floor is the maximum air exhaust resistance value delta PmaxHowever, in practical situations, there may be interference of other factors causing the floor with the largest exhaust resistance value to be not the bottommost floor, and this embodiment calculates the exhaust resistance value Δ P of the start terminal of each floor when the target exhaust air volume is reachediAnd determining the exhaust resistance value delta PiThe maximum value in (1) is the maximum exhaust resistance value delta PmaxThe accuracy of the calculation can be improved.
Optionally, determining a target resistance coefficient of the power distribution valve corresponding to each terminal machine according to the maximum air exhaust resistance value, including:
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 the starting terminal machine according to the resistance difference.
Specifically, for each starting terminal machine, the maximum air exhaust resistance value delta P can be calculatedmaxAnd the exhaust 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 flow (in Q) of the power distribution valvez1For example) the target resistance coefficient ξ that needs to be adjustedix＝ΔPix/(Qz1*Qz1) To obtain the starting terminalTarget resistance coefficient xiix。
With continued reference to fig. 2, optionally, the central extractor hood system further includes a main machine 13, the main machine 13 being located in the common flue 10.
After confirming the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information, the method further comprises the following steps:
and determining the target operation state of the host according to the maximum air exhaust resistance value and the current working condition information.
And the control host operates in the target operation state.
Wherein, confirm the target running state information of host computer according to maximum air discharge resistance value and current operating mode information, include:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target operation state of the 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 host machine is an opening state.
Specifically, as shown in fig. 2, the main machine can be installed at an air outlet of the public flue 10 on the roof of the house, and the main machine contains a power fan device inside, which can play a role of assisting in discharging smoke for the oil smoke inside the public flue 10.
Optionally, the host may further include a fan frequency conversion control unit and a controller, where the fan frequency conversion control unit is used to adjust the frequency of the power fan device; the control device in the central range hood system can be integrated in the controller, and the terminal machine, the power distribution valve and the host machine can be communicated in a wired or wireless mode.
For example, the host computer is networked with the power distribution valves of all floors to realize real-time communication, so that the host computer can acquire the startup and shutdown signals of all terminal machines.
In this embodiment, the target operation state of the host is determined according to the maximum exhaust resistance value and the current working condition information, and the host is controlled to operate in the target operation state. 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, and at the moment, the host machine is in a closed state, namely the power fan equipment of the host 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 volume is a positive value, at the moment, the host 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 the smoke, so that the starting terminal machine of each floor can reach the target air exhaust volume.
Optionally, determining a target operation state of the host according to the maximum air discharge resistance value and the current working condition information, further comprising:
and when the maximum air exhaust resistance value is larger than 0, determining the working point information of the host 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 host at the working point.
And determining the target operating frequency of the host according to the operating point information.
Controlling the host computer to operate at the target operating state further includes controlling the host computer to operate at the target operating frequency.
The operating point information of the host computer comprises an air volume value Q and an air pressure value P when the host computer is at the operating point, namely the operating 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(the 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 main engine power fan device at each operating frequency is usedx(P，Q，Rx) Determining a target operating frequency R of the hostxControlling the power fan equipment of the main machine at a frequency RxThe 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) Referring to a relationship curve between air pressure and air volume of a power fan device of a host, for example, fig. 5 is a schematic diagram of a power performance curve of a host according to an embodiment of the present invention, for exampleAs shown in FIG. 5, the abscissa Q represents the air volume, the ordinate P represents the wind pressure, and the terminal machine is operated 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, fig. 7 is a schematic structural diagram of another control method of a central extractor hood system according to an embodiment of the present invention, fig. 8 is a schematic structural diagram of another control method of a central extractor hood system according to an embodiment of the present invention, fig. 9 is a schematic structural diagram of another control method of a central extractor hood system according to an embodiment of the present invention, fig. 10 is a schematic structural diagram of another control method of a central extractor hood system according to an embodiment of the present invention, and as shown in fig. 6 to 10, effective exhaust air volumes of three terminals can be preset by the central extractor hood system: qZ1、QZ2And QZ3And Q isZ1＞QZ2＞QZ3(ii) a The terminal machine has three gears of low, middle and high, and the corresponding gears are respectively X1 low gear, X2 middle gear and X3 high gear; the preset squeal opening degree is set to 45 ° as an example. The control method of the central range hood system comprises the following steps:
and S110, numbering power distribution valves installed in kitchens of all floors of the same public flue in sequence from floor 1 to top floor N. Meanwhile, the host machine is networked with the power distribution valves on all floors and communicates in real time to obtain the startup and shutdown signals of all the terminal machines in the central range hood system.
S120-1, detecting a startup and shutdown signal of the terminal machine in real time by the power distribution valves of each floor, and broadcasting the startup signal to the central range hood unit network system by the power distribution valves after detecting the startup signal of the terminal machine.
S120-2, the system program starts the target exhaust volume of the default terminal set to be QZ1The initial gear of the terminal is X1 low gear.
S130, then according to the number m of the starting-up terminal machines and the target exhaust volume Q of the starting-up terminal machinesZ1Total floor number N, floor height h, common flue roughness k, and power performance curve P of starting terminal machine at X1 low levelx＝fx(Q) and the cross-sectional area S of the common flue, calculating the exhaust amount Q of the starting terminal machine of each floor reaching the target exhaust amountZ1Hourly exhaust resistance Δ Pi＝f(f(Qz1)，S，Qz1N, k, m, h) and calculating the maximum air discharge resistance value delta Pmax. Under the working condition, the power performance working point of the main engine 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 main machine at each operating frequencyx(P，Q，Rx) Controlling the power fan equipment of the main machine at a frequency RxAnd (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 the opening degree of the power distribution valve corresponding to all the starting terminal machines is 90 degrees, the power fan equipment of the main machine is not started.
S140-2, when delta PmaxWhen > 0, the power fan device of the main machine is at the frequency R in S130xAnd (5) operating. Calculating the maximum air exhaust resistance value delta PmaxAnd air discharge 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 valvez1Target resistance coefficient xi required to be adjustedix＝ΔPix/(Qz1*Qz1). Then countCalculating a target resistance coefficient xiixAnd a resistance coefficient xi of the power distribution valve when the opening degree is the preset squeaking opening degree45(preset howling opening is exemplified by 45 °) difference ξ between themi＝ξix-ξ45。
S140-2-1, when xiiWhen the opening degree-resistance characteristic relation f (xi) of the power distribution valve is less than or equal to 0ixθ) calculating a target opening θ of the power distribution valveiAnd controlling the power distribution valve to perform the target opening degree thetai。
S140-2-2, when xiiWhen the frequency is more than 0, the gears of all the starting terminals are adjusted to be X2 middle gears, the step S130 is carried out, and the frequency R of the power fan equipment of the main machine is matched and calculated againxAnd judge xiiWhether the opening degree is less than or equal to 0 is satisfied, if so, the opening degree-resistance characteristic relation f (xi) of the power distribution valve is determinedixTheta) calculating a target opening degree theta of the power distribution valveiAnd controlling the power distribution valve to perform the target opening degree thetai(ii) a If not, the process proceeds to step S140-2-3.
S140-2-3, adjusting the gear of all the starting terminals to be X3 high-grade, switching to the step S130 again, and judging ξiIf ≦ 0 is true, if ξiIf the opening degree of the power distribution valve is less than or equal to 0, the opening degree-resistance characteristic relation f (xi) of the power distribution valve is determinedixTheta) calculating a target opening degree theta of the power distribution valvei(ii) a If not, the process proceeds to step S140-2-4.
S140-2-4, the target exhaust air volume of the terminal machine is QZ1Adjusted to QZ2Turning to the step S130, the frequency R of the main engine power fan equipment is calculated in a matched mode againxAnd judge xiiIf xi is less than or equal to 0, then according to the opening-resistance characteristic relation f (xi) of the power distribution valveixθ) calculating a target opening θ of the power distribution valvei(ii) a If xi still appearsiIf not more than 0, the process proceeds to step S140-2-5.
S140-2-5, the target exhaust volume of the terminal machine is QZ2Adjusted to QZ3Turning to the step S130, the frequency R of the main engine power fan equipment is calculated in a matched mode againxAnd judge xiiIf xi is less than or equal to 0, then according to the opening-resistance characteristic relation f (xi) of the power distribution valveixθ) calculating a target opening θ of the power distribution valvei(ii) a If xi still appearsiWhen no more than 0 is satisfied, the composition does not satisfy xiiThe opening degree of the power distribution valve less than or equal to 0 is set to be 45 degrees.
The central range hood system and the control method thereof provided by the embodiment of the invention realize balanced, efficient and energy-saving exhaust of the central range hood system by adjusting the gear of the terminal, the target exhaust volume of the terminal and the power supply of the host based on the exhaust resistance characteristics under various working conditions, and ensure that the minimum opening of the power distribution valve is not lower than the preset squeal opening (such as 45 degrees), thereby solving the squeal problem of the power distribution valve, reducing noise and improving user experience.
Based on the same invention concept, the embodiment of the invention also provides a control device of the central range hood system, the control device is applied to the central range hood system, the central range hood system comprises a common flue, and a power distribution valve and a terminal machine which are positioned on each floor, and the terminal machine on each floor is connected with the common flue through the power distribution valve.
The control device may be implemented in hardware and/or software, and may be configured in a controller of a host, for example.
Fig. 11 is a schematic structural diagram of a control device of a central extractor hood system according to an embodiment of the present invention, and as shown in fig. 11, the control device 20 includes:
the working condition information obtaining module 30 is configured to obtain current working condition information, where the working condition information includes the number of the terminal machines, a target air exhaust volume of the terminal machines, and a gear of the terminal machines.
And a maximum air exhaust resistance value determining module 31, configured to determine the maximum air exhaust resistance value of the terminal machine according to the current working condition information.
And a target opening determining module 32, configured to determine a target opening of the power distribution valve corresponding to each startup terminal according to the maximum air exhaust resistance value.
And a control module 33 for controlling the power distribution valve to execute the target opening.
The target opening determining module 32 includes:
and a target resistance coefficient determining unit 321, configured to determine, when the maximum air discharge resistance value is greater than 0, a target resistance coefficient of the power distribution valve corresponding to each startup terminal according to the maximum air discharge resistance value.
A target opening determining unit 322 for determining a target opening of the power distribution valve according to the target resistance coefficient when the target resistance coefficient is less than or equal to the resistance coefficient of the power distribution valve at the preset squeal opening.
And the gear adjusting unit 323 is used for increasing the gear of the starting terminal machine when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree.
The control device of the central range hood system provided by the embodiment of the invention obtains the current working condition information through the working condition information obtaining module 30, determines the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information through the maximum air exhaust resistance value determining module 31, determines the maximum air exhaust resistance value according to the maximum air exhaust resistance value through the target opening determining module 32, and controls the power distribution valve to execute the target opening through the control module 33, so that resistance adjustment is carried out through the power distribution valve of each floor, the air exhaust resistance of the terminal machine positioned at a high floor position is properly increased, the air exhaust resistance value of each floor is close to the maximum air exhaust resistance value, and the relative balance of the air exhaust volume of the starting terminal machines of different floors is realized. When the maximum air discharge resistance value is greater than 0, the target resistance coefficient determining unit 321 determines a target resistance coefficient of a power distribution valve corresponding to each start-up terminal according to the maximum air discharge resistance value, and when the target resistance coefficient is greater than the resistance coefficient of the power distribution valve under the preset squeal opening, the gear adjusting unit 323 increases the wind pressure provided by a built-in air discharge motor of the start-up terminal by increasing the gear of the start-up terminal, so that the air discharge resistance required to be overcome when the start-up terminal reaches the target air discharge capacity is reduced, the target resistance coefficient required to be provided by the power distribution valve is further reduced, and the target opening of the power distribution valve is increased to reduce squeal noise.
Optionally, the target opening determining module further includes a target air exhaust amount adjusting unit, and the target air exhaust amount adjusting unit is configured to reduce the target air exhaust amount of the startup terminal machine when the target resistance coefficient is greater than the resistance coefficient of the power distribution valve at the preset howling opening and the gear of the startup terminal machine is the preset maximum gear.
Optionally, the target opening determining module further includes a minimum target opening setting unit, where the minimum target opening setting unit is configured to determine the preset howling opening as the target opening of the power distribution valve when the target resistance coefficient is greater than the resistance coefficient of the power distribution valve at the preset howling opening, the gear of the power-on terminal is a preset maximum gear, and the target air discharge amount of the power-on terminal is a preset minimum air discharge amount.
Optionally, the target opening determining module further includes a maximum target opening setting unit, and the maximum target opening setting unit is configured to determine that the target opening of the power distribution valve corresponding to the power-on terminal is 90 ° when the maximum air discharge resistance value is less than or equal to 0.
Optionally, the maximum air discharge resistance value determining module 31 is further configured to determine an air discharge resistance value of each startup terminal according to the current working condition information, and determine that the maximum air discharge resistance value is the maximum air discharge resistance value.
Optionally, the target resistance coefficient determining unit 321 is further configured to determine a difference between the maximum air exhaust resistance value and the air exhaust resistance value of each start-up terminal as a resistance difference, and determine the target resistance coefficient of the power distribution valve corresponding to the start-up terminal according to the resistance difference.
Optionally, the central extractor hood system further comprises a main machine, and the main machine is located in the common flue.
The control device provided by the embodiment of the invention also comprises:
and the host control module is used for determining the target running state of the host according to the maximum air exhaust resistance value and the current working condition information and controlling the host to run in the target running state.
Optionally, the host control module is further configured to determine that the target operation state of the host is a closed state when the maximum exhaust resistance value is less than or equal to 0, and determine that the target operation state of the host is an open state when the maximum exhaust resistance value is greater than 0.
Optionally, the host control module is further configured to determine, when the maximum air exhaust resistance value is greater than 0, operating point information of the host according to the maximum air exhaust resistance value and the current operating condition information, where the operating point information includes an air volume value and an air pressure value of the host at an operating point, determine a target operating frequency of the host according to the operating point information, and control the host to operate at the target operating frequency.
The control device of the central range hood system provided by the embodiment of the invention can execute the control method of the central range hood system provided by any embodiment of the invention, has corresponding functional modules and beneficial effects of the execution method, and the explanations of the structures and terms which are the same as or corresponding to the embodiments are not repeated herein.
Based on the same inventive concept, the embodiment of the invention also provides a central range hood system which comprises a common flue, and power distribution valves and terminal machines positioned on all floors, wherein the terminal machines on all floors are connected with the common flue through the power distribution valves. The central range hood system further comprises a control device of the central range hood system provided by any one of the embodiments, and the power distribution valve is in communication connection with the corresponding terminal and the control device of the central range hood system respectively.
The central range hood system provided by the embodiment of the invention can execute the control method of the central range hood system provided by any embodiment of the invention, has corresponding functional modules and beneficial effects of the execution method, and the explanation of the same or corresponding structures and terms as the above embodiments is not repeated herein.
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 control method of a central range hood system is characterized in that the control method is applied to the central range hood system, the central range hood system comprises a common flue, and a power distribution valve and a terminal machine which are positioned on each floor, the terminal machine on each floor is connected with the common flue through the power distribution valve, and the control method comprises the following steps:
s1, obtaining current working condition information, wherein the working condition information comprises the number of the starting terminal machines, the target air exhaust volume of the starting terminal machines and the gear positions of the starting 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 of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value;
s4, controlling the power distribution valve to execute the target opening degree;
wherein, according to the maximum air exhaust resistance value, determining the target opening of the power distribution valve corresponding to each starting terminal machine comprises:
when the maximum air exhaust resistance value is larger than 0, determining a target resistance coefficient of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value;
when the target resistance coefficient is smaller than or equal to the resistance coefficient of the power distribution valve under the preset squeaking opening degree, determining the target opening degree of the power distribution valve according to the target resistance coefficient;
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve at the preset squeal opening degree, increasing the gear of the starting terminal, and repeating the steps S2 and S3.
2. The control method according to claim 1,
according to the maximum air exhaust resistance value, determining the target opening of the power distribution valve corresponding to each starting terminal, and further comprising:
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree and the gear of the starting terminal machine is the preset maximum gear, reducing the target air exhaust volume of the starting terminal machine, and repeating the steps S2 and S3.
3. The control method according to claim 1,
according to the maximum air exhaust resistance value, determining the target opening of the power distribution valve corresponding to each starting terminal, and further comprising:
and when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under a preset squeal opening degree, the gear of the starting terminal machine is a preset maximum gear, and the target air exhaust volume of the starting terminal machine is a preset minimum air exhaust volume, determining the preset squeal opening degree as the target opening degree of the power distribution valve.
4. The control method according to claim 1,
according to the maximum air exhaust resistance value, determining the target opening of the power distribution valve corresponding to each starting terminal, and further comprising:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target opening of the power distribution valve corresponding to the starting terminal machine is 90 degrees.
5. The control method according to claim 1,
determining the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information, comprising the following steps:
determining the air exhaust resistance value of each starting terminal according to the current working condition information;
and determining the maximum air exhaust resistance value as the maximum air exhaust resistance value.
6. The control method according to claim 5,
determining a target resistance coefficient of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value, wherein the target resistance coefficient comprises:
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 the power distribution valve corresponding to the starting terminal machine according to the resistance difference.
7. The control method according to claim 1,
the central range hood system also comprises a host machine, and the host machine is positioned in the common flue;
after determining the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information, the method further comprises the following steps:
determining the target running state of the host according to the maximum air exhaust resistance value and the current working condition information;
controlling the host to operate in the target operation state;
determining a target operation state of the host according to the maximum air exhaust resistance value and the current working condition information, wherein the method comprises the following steps:
when the maximum air exhaust resistance value is less than or equal to 0, determining that the target running state of the host 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 host machine is an opening state.
8. The control method according to claim 7,
determining the target operation state of the host according to the maximum air exhaust resistance value and the current working condition information, and further comprising:
when the maximum air exhaust resistance value is larger than 0, determining working point information of the host according to the maximum air exhaust resistance value and the current working condition information, wherein the working point information comprises an air volume value and an air pressure value of the host at a working point;
determining the target operating frequency of the host according to the operating point information;
controlling the host to operate in the target operating state, further comprising:
and controlling the host to operate at the target operation frequency.
9. The utility model provides a controlling means of central range hood system which characterized in that is applied to central range hood system, central range hood system includes public flue and is located the power distribution valve and the terminating machine of each floor, the terminating machine of each floor pass through the power distribution valve with public flue is connected, controlling means includes:
the system comprises a working condition information acquisition module, a starting terminal and a starting terminal control module, wherein the working condition information acquisition module is used for acquiring current working condition information, and the working condition information comprises the number of the starting terminals, the target air exhaust volume of the starting terminals and the gears of the starting terminals;
the maximum air exhaust resistance value determining module is used for determining the maximum air exhaust resistance value of the starting terminal according to the current working condition information;
the target opening determining module is used for determining the target opening of the power distribution valve corresponding to each starting terminal according to the maximum air exhaust resistance value;
the control module is used for controlling the power distribution valve to execute the target opening degree;
wherein the target opening degree determination module includes:
a target resistance coefficient determining unit, configured to determine, when the maximum air discharge resistance value is greater than 0, a target resistance coefficient of the power distribution valve corresponding to each of the startup terminals according to the maximum air discharge resistance value;
the target opening determining unit is used for determining the target opening of the power distribution valve according to the target resistance coefficient when the target resistance coefficient is smaller than or equal to the resistance coefficient of the power distribution valve under the preset squeal opening;
and the gear adjusting unit is used for increasing the gear of the starting terminal when the target resistance coefficient is larger than the resistance coefficient of the power distribution valve under the preset squeal opening degree.
10. A central range hood system is characterized by comprising a common flue, power distribution valves and terminal machines, wherein the power distribution valves and the terminal machines are positioned on all floors;
the central extractor hood system further comprises a control device of the central extractor hood system of claim 9;
and the power distribution valve is respectively in communication connection with the corresponding terminal machine and the control device of the central range hood system.
CN202210304763.XA 2022-03-22 Central range hood system and control method and control device thereof Active CN114688591B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010011635A1 (en) * 2010-03-16 2011-09-22 Continental Automotive Gmbh Method for operating soot sensor utilized to measure soot in exhaust gas in exhaust gas system of motor car combustion engine, involves detecting resistance/capacitance change of sensor based on operation of sensor using alternating voltage
CN205937866U (en) * 2016-08-22 2017-02-08 刘午淇 Domestic smoke ventilator exhaust valve with high leakproofness and low resistance of airing exhaust
US20170229111A1 (en) * 2014-08-05 2017-08-10 Panasonic Intellectual Property Management Co., Ltd. Signal processing device, program, and range hood device
US20180330744A1 (en) * 2016-07-20 2018-11-15 Tencent Technology (Shenzhen) Company Limited Howling detection method and apparatus
CN111520790A (en) * 2020-06-19 2020-08-11 杭州老板电器股份有限公司 Central range hood, controller and control method
WO2021238186A1 (en) * 2020-05-27 2021-12-02 佛山市顺德区美的洗涤电器制造有限公司 Cooking oil fume suction apparatus, combined cooking device, control method and apparatus, and storage medium

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010011635A1 (en) * 2010-03-16 2011-09-22 Continental Automotive Gmbh Method for operating soot sensor utilized to measure soot in exhaust gas in exhaust gas system of motor car combustion engine, involves detecting resistance/capacitance change of sensor based on operation of sensor using alternating voltage
US20170229111A1 (en) * 2014-08-05 2017-08-10 Panasonic Intellectual Property Management Co., Ltd. Signal processing device, program, and range hood device
US20180330744A1 (en) * 2016-07-20 2018-11-15 Tencent Technology (Shenzhen) Company Limited Howling detection method and apparatus
CN205937866U (en) * 2016-08-22 2017-02-08 刘午淇 Domestic smoke ventilator exhaust valve with high leakproofness and low resistance of airing exhaust
WO2021238186A1 (en) * 2020-05-27 2021-12-02 佛山市顺德区美的洗涤电器制造有限公司 Cooking oil fume suction apparatus, combined cooking device, control method and apparatus, and storage medium
CN111520790A (en) * 2020-06-19 2020-08-11 杭州老板电器股份有限公司 Central range hood, controller and control method

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