CN112833438A - Method and device for controlling constant air volume of range hood - Google Patents
Method and device for controlling constant air volume of range hood Download PDFInfo
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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
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- F24C15/20—Removing cooking fumes
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Abstract
The invention provides a method and a device for controlling constant air volume of a range hood, which relate to the technical field of equipment control and comprise the following steps: acquiring initial working parameters of the range hood after the range hood acquires a constant air volume control command, wherein the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood; calculating current working parameters based on the initial working parameters, wherein the current working parameters comprise the current air quantity of the range hood and the current resistance coefficient of a pipeline of the range hood; if the current air volume of the range hood is different from the target air volume, calculating the target rotating speed of a motor of the range hood based on the current working parameters; the motor of the range hood is controlled to work according to the target rotating speed, so that the air outlet speed of the range hood is constant, and the technical problem that the method for controlling the range hood to be in constant air volume control in the prior art is complex is solved.
Description
Technical Field
The invention relates to the technical field of equipment control, in particular to a method and a device for controlling constant air volume of a range hood.
Background
The environment of the smoke exhaust of the user kitchen is different, the difference is very big, and even some exhaust conditions are extremely bad. The actual kitchen operation air volume of ordinary lampblack absorber can be different, and some kitchen conditions are poor, and result in the air volume to hang down very much to can't improve. Some cigarette machines are in order to solve these problems, provide intelligent gear, are different from the cigarette machine of several traditional fixed gears, and real-time regulation can be carried out to intelligent gear, can improve the amount of wind when the amount of wind is low excessively, reduces some amount of wind promotion noise when the amount of wind is too high and experiences. Some cigarettes may be adjusted according to the amount of smoke.
However, the air exhaust environment in the kitchen is poor and is affected by other users. The conventional gear of the range hood often cannot achieve ideal exhaust air volume and the air volume fluctuation is large, so how to control the range hood with constant air volume is a problem to be solved urgently.
No effective solution has been proposed to the above problems.
Disclosure of Invention
In view of this, the present invention aims to provide a method and a device for controlling a constant air volume of a range hood, so as to alleviate the technical problem that the method for controlling the constant air volume of the range hood in the prior art is complicated.
In a first aspect, an embodiment of the present invention provides a method for controlling a constant air volume of a range hood, including: after the range hood acquires a constant air volume control command, acquiring initial working parameters of the range hood, wherein the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood; calculating current working parameters based on the initial working parameters, wherein the current working parameters comprise the current air quantity of the range hood and the current resistance coefficient of a pipeline of the range hood; if the current air volume of the range hood is different from the target air volume, calculating the target rotating speed of a motor of the range hood based on the current working parameters; and controlling the motor of the range hood to work according to the target rotating speed so as to keep the air outlet speed of the range hood constant.
Further, based on the initial operating parameters, calculating current operating parameters, including: calculating the current air quantity of the range hood by using a relational expression of the air quantity and the rotating speed and the initial working parameters; and calculating the current resistance coefficient of the pipeline of the range hood by using the outlet static pressure calculation formula, the current air quantity of the range hood and the initial working parameters.
Further, the relational expression of the air volume and the rotating speed is a quadratic function or a high-order function.
Furthermore, the relational expression between the air volume and the rotating speed is Q ═ a × n2+ b + n + c, wherein Q is the air volume of the range hood, n is the rotating speed of the motor of the range hood, and a, b and c are constants; the outlet static pressure calculation formula is P-K Q2And B, wherein P is the outlet static pressure of the range hood pipeline collected by the pressure sensor arranged at the outlet of the range hood, B is the back pressure of the common flue collected by the pressure sensor arranged at the range hood pipeline, and K is the resistance coefficient of the range hood pipeline.
Further, if the current air volume of the range hood is different from the target air volume, calculating the target rotating speed of the motor of the range hood based on the current working parameters, wherein the target rotating speed comprises the following steps: calculating a target outlet static pressure of the range hood pipeline based on the outlet static pressure calculation formula and the target air volume; and calculating the target rotating speed of the motor of the range hood based on the target outlet static pressure and the outlet static pressure calculation formula.
Further, calculating a target rotation speed of the range hood motor based on the target outlet static pressure and the outlet static pressure calculation formula, including: calculating an ideal resistance coefficient of the range hood pipeline when the back pressure of the common flue is 0 based on the target air volume and the target outlet static pressure; and calculating the target rotating speed of the motor of the range hood based on the ideal resistance coefficient of the pipeline of the range hood.
Further, based on the target air volume and the target outlet static pressure, calculating an ideal resistance coefficient of the range hood pipeline when the back pressure of the common flue is 0, including: and calculating an ideal resistance coefficient of the pipeline of the range hood by using the target air volume, the target outlet static pressure and a wind resistance calculation formula.
Further, the wind resistance calculation formula is that K is P/Q2。
Further, based on the ideal resistance coefficient of the pipeline of the range hood, calculating the target rotating speed of the motor of the range hood, and the method comprises the following steps: based on the ideal resistance coefficient of the pipeline of the range hood, calculating intersection data of the range hood, wherein the intersection data comprise: the intersection point rotating speed of the motor of the range hood, the intersection point air quantity of the range hood and the intersection point outlet static pressure of the pipeline of the range hood; and calculating the target rotating speed based on the intersection point data of the range hood.
Further, based on the ideal resistance coefficient of the pipeline of the range hood, intersection point data of the range hood is calculated, and the intersection point data comprises the following steps: and simultaneously calculating intersection point data of the range hood by using the ideal resistance coefficient and the target function of the pipeline of the range hood and using a Fisher algorithm, wherein the target function comprises: the relationship between the air volume and the rotating speed, the wind resistance calculation formula and the relationship between the pressure and the rotating speed, wherein the relationship between the pressure and the rotating speed is P ═ e × n2+ g n + h, wherein e, g and h are constants.
Further, the method further comprises: and if the current air volume of the range hood is the same as the target air volume, controlling the motor of the range hood to work according to the current rotating speed.
In a second aspect, an embodiment of the present invention further provides a control device for a range hood with a constant air volume, including: the range hood control system comprises a collecting unit, a first calculating unit, a second calculating unit and a control unit, wherein the collecting unit is used for collecting initial working parameters of the range hood after the range hood obtains a constant air volume control instruction, and the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood; the first calculation unit is used for calculating current working parameters based on the initial working parameters, wherein the current working parameters comprise the current air quantity of the range hood and the current resistance coefficient of a pipeline of the range hood; the second calculating unit is used for calculating the target rotating speed of the motor of the range hood based on the current working parameters under the condition that the current air volume of the range hood is different from the target air volume; and the control unit is used for controlling the motor of the range hood to work according to the target rotating speed so as to ensure that the air outlet speed of the range hood is constant.
Further, the acquisition unit includes: and the monitoring circuit is used for acquiring the current back pressure of the common flue sent by the first pressure sensor, the current outlet static pressure of the range hood pipeline sent by the second pressure sensor and the current rotating speed of the range hood motor sent by the range hood running program after the range hood obtains the constant air volume control command.
Further, the first calculation unit includes: the wind resistance analysis circuit is used for calculating the current resistance coefficient of the pipeline of the range hood based on the initial working parameters; and the air volume determining circuit is used for calculating the current air volume of the range hood based on the initial working parameters.
Further, the second calculation unit includes: the current air quantity comparison circuit is used for determining whether the current air quantity of the range hood is the same as the target air quantity; and the rotating speed calculating circuit is used for calculating the target rotating speed of the motor of the range hood based on the current working parameters under the condition that the current air quantity of the range hood is different from the target air quantity.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory and a processor, where the memory is used to store a program that supports the processor to execute the method in the first aspect, and the processor is configured to execute the program stored in the memory.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the method in the first aspect.
In the embodiment of the invention, after the range hood acquires the constant air volume control command, acquiring initial working parameters of the range hood, wherein the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood; calculating current working parameters based on the initial working parameters, wherein the current working parameters comprise the current air quantity of the range hood and the current resistance coefficient of a pipeline of the range hood; if the current air volume of the range hood is different from the target air volume, calculating the target rotating speed of a motor of the range hood based on the current working parameters; and controlling a motor of the range hood to work according to the target rotating speed so as to keep the air outlet speed of the range hood constant.
In the application, because in the existing method for controlling the constant air volume of the range hood, an iterative algorithm is generally needed to be used when the rotating speed needed when the motor of the range hood realizes the constant air volume is calculated, the calculation complexity is high, in the application, only the current rotating speed of the motor of the range hood needs to be collected, the rotating speed needed when the constant air volume is realized can be calculated sequentially by the current backpressure of a public flue and the current outlet static pressure of a pipeline of the range hood, the purpose of simplifying the calculation complexity is achieved, the technical problem that the method for controlling the constant air volume of the range hood in the prior art is complex is solved, and the technical effect of improving the real-time performance of controlling the constant air volume of the range hood is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for controlling a constant air volume of a range hood according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for controlling a constant air volume of a range hood according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a control device for constant air volume of a range hood according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another control device for constant air volume of a range hood according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
The first embodiment is as follows:
according to an embodiment of the present invention, there is provided an embodiment of a method for controlling a range hood to control a constant air volume, where it is to be noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that here.
Fig. 1 is a flowchart of a method for controlling a constant air volume of a range hood according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
step S102, after the range hood obtains a constant air volume control command, acquiring initial working parameters of the range hood, wherein the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood;
it should be noted that the outlet static pressure is a performance index of the range hood fan, and is used for measuring the work of the fan, and the common unit is Pa.
Step S104, calculating current working parameters based on the initial working parameters, wherein the current working parameters comprise the current air quantity of the range hood and the current resistance coefficient of a pipeline of the range hood;
step S106, if the current air volume of the range hood is different from the target air volume, calculating the target rotating speed of a motor of the range hood based on the current working parameters;
and S108, controlling the motor of the range hood to work according to the target rotating speed so as to enable the air outlet speed of the range hood to be constant.
It should be noted that the air volume is a performance index of the fan of the range hood, the amount of the fan passing through the unit time is measured, and the common unit is m3/min。
The constant air volume is as follows: and in the running process of the fan, the air quantity is constant.
In the application, because in the existing method for controlling the constant air volume of the range hood, an iterative algorithm is generally needed to be used when the rotating speed needed when the motor of the range hood realizes the constant air volume is calculated, the calculation complexity is high, in the application, only the current rotating speed of the motor of the range hood needs to be collected, the rotating speed needed when the constant air volume is realized can be calculated at one time by the current backpressure of a public flue and the current outlet static pressure of a pipeline of the range hood, the purpose of simplifying the calculation complexity is achieved, the technical problem that the method for controlling the constant air volume of the range hood in the prior art is complex is solved, and the technical effect of improving the real-time performance of controlling the constant air volume of the range hood is realized.
It should be noted that before the range hood leaves the factory, a worker may preset a value for a target air volume, which is calibrated based on various kitchen practical use tests, for example, an air volume average value that satisfies a better smoking effect; each gear has respective preset air volume, so that a target air volume calibration table of all gears is manufactured and put into the system for calling at any time.
Meanwhile, the target air volume value can be adjusted by the user in actual use, so that the best effect of the smoking effect in the kitchen of the user is achieved, and the noise is comfortable; in addition, a more intelligent target air volume determination method is as follows: and a system networking data center is utilized, and an air volume calibration meter is reasonably formulated according to the wind resistance information of the building in different time periods and different seasons.
In the embodiment of the present invention, step S104 includes the following steps:
step S11, calculating the current air volume of the range hood by using the relational expression between the air volume and the rotation speed and the initial operating parameter, wherein preferably, the relational expression between the air volume and the rotation speed is Q ═ a × n2+ b + n + c, wherein Q is the air volume of the range hood, n is the rotating speed of the motor of the range hood, and a, b and c are constants;
step S12, calculating a current resistance coefficient of the range hood duct using the outlet static pressure calculation formula, the current air volume of the range hood, and the initial operating parameter, wherein preferably, the outlet static pressure calculation formula is P ═ K × Q2And B, wherein P is the outlet static pressure of the range hood pipeline collected by the pressure sensor arranged at the outlet of the range hood, B is the back pressure of the common flue collected by the pressure sensor arranged at the range hood pipeline, and K is the resistance coefficient of the range hood pipeline.
In the embodiment of the invention, after the range hood is started and the constant air volume control command is obtained, the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood are collected.
Then, the current rotation speed is substituted into a relational expression Q ═ a × n of the air volume and the rotation speed2And + b + n + c, calculating the current air volume of the range hood, wherein Q is the air volume of the range hood, n is the rotating speed of a motor of the range hood, and a, b and c are constants.
The above-described relational expression between the air volume and the rotational speed is preferably a quadratic function, and a high-order function of three or more may be realized.
Then, the current air volume, the current back pressure and the current pressure are measuredSubstituting outlet static pressure into outlet static pressure to calculate formula P ═ K × Q2And B, calculating the current resistance coefficient of the range hood pipeline, wherein P is the outlet static pressure of the range hood pipeline collected by a pressure sensor arranged at the outlet of the range hood, B is the back pressure of a common flue collected by the pressure sensor arranged at the range hood pipeline, and K is the resistance coefficient of the range hood pipeline.
And then, judging whether the current air volume of the range hood is different from the target air volume.
The target air volume may be set by the user according to actual conditions.
If not, executing step S106, wherein step S106 includes the following steps:
step S21, calculating a target outlet static pressure of the range hood pipeline based on the outlet static pressure calculation formula and the target air volume;
and step S22, calculating the target rotating speed of the range hood motor based on the target outlet static pressure and the outlet static pressure calculation formula.
Note that, step S22 includes the following steps:
calculating an ideal resistance coefficient of the range hood pipeline when the back pressure of the common flue is 0 based on the target air volume and the target outlet static pressure;
and calculating the target rotating speed of the motor of the range hood based on the ideal resistance coefficient of the pipeline of the range hood.
In the embodiment of the invention, under the condition that the current air volume of the range hood is different from the target air volume (namely Q current is not equal to Q target), the target air speed, the back pressure of the common flue and the resistance coefficient of the pipeline of the range hood are substituted into an outlet static pressure calculation formula P ═ K × Q2And + B, calculating the target outlet static pressure (Ptarget) of the range hood pipeline.
Then, an ideal wind resistance when the back pressure of the common flue is 0Pa under the conditions of the target air quantity and the target outlet static pressure is calculated, the target air quantity and the target outlet static pressure and B are equal to 0Pa, and the ideal wind resistance coefficient K is obtained by substituting the target air quantity and the target outlet static pressure into an outlet static pressure calculation formulaIdeal for＝PTarget/QTarget 2。
And finally, calculating the target rotating speed of the motor of the range hood by using the ideal resistance coefficient of the pipeline of the range hood.
Note that, step S23 includes the following steps:
step S31, calculating intersection data of the range hood based on the ideal resistance coefficient of the range hood pipeline, wherein the intersection data comprises: the intersection point rotating speed of the motor of the range hood, the intersection point air quantity of the range hood and the intersection point outlet static pressure of the pipeline of the range hood;
and step S32, calculating the target rotating speed based on the intersection data of the range hood.
In the embodiment of the invention, the ideal resistance coefficient of the pipeline of the range hood is brought into an objective function to obtain the following formula, wherein the objective function comprises the following components: the relation between the air quantity and the rotating speed, the wind resistance calculation formula and the relation between the pressure and the rotating speed are P ═ e × n2+ g n + h, wherein e, g and h are constants.
Calculating the air quantity pressure and the rotating speed Q of the operating point of the range hood under the ideal wind resistanceIntersection point，PIntersection point，nIntersection point。
Pressure versus speed relationship: pIntersection point＝e*nIntersection point 2+g*nIntersection point+h；
Wind resistance calculation formula: pIntersection point＝KIntersection point*QIntersection point 2；
The relational expression of air volume and rotating speed is as follows: qIntersection point＝a*nIntersection point 2+b*nIntersection point+c；
Wherein, PIntersection point，nIntersection pointAnd QIntersection pointThe static pressure of an intersection outlet of a pipeline of the range hood, the intersection rotating speed of a motor of the range hood and the intersection air quantity of the range hood are respectively.
And then, calculating intersection point data of the range hood by using a Fisher algorithm.
Finally, substituting the intersection data into a target rotating speed calculation formula n according to the similar working condition relation under the back pressure of 0Target＝nIntersection point*(QTarget/QIntersection point) Wherein n isTargetIs the target rotational speed.
After the target rotating speed is calculated, the motor of the range hood is controlled to work according to the target rotating speed, so that the air outlet speed of the range hood is constant, and the aim of controlling the range hood to work according to the constant air volume is fulfilled.
According to the method, the target rotating speed is calculated at one time through data such as the air quantity and the rotating speed acquired in real time, and the target rotating speed is obtained mainly by simultaneously calculating a relational expression of the air quantity and the rotating speed, a wind resistance calculation formula and a relational expression of pressure and the rotating speed and solving three parameter values of intersection outlet static pressure, intersection air quantity and intersection rotating speed. Compared with the prior art, the method for solving the target rotating speed by using the iterative algorithm has the advantages of low calculation complexity and good real-time performance.
In the embodiment of the present invention, as shown in fig. 2, the method further includes:
and S105, if the current air volume of the range hood is the same as the target air volume, controlling the motor of the range hood to work according to the current rotating speed.
Example two:
the embodiment of the invention also provides a control device for the constant air volume of the range hood, which is used for executing the control method for the constant air volume of the range hood provided by the embodiment of the invention.
As shown in fig. 3, fig. 3 is a schematic view of the control device for controlling the constant air volume of the range hood, and the control device for controlling the constant air volume of the range hood comprises: an acquisition unit 10, a first calculation unit 20, a second calculation unit 30 and a control unit 40.
The acquisition unit 10 is used for acquiring initial working parameters of the range hood after the range hood acquires a constant air volume control command, wherein the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood;
the first calculating unit 20 is configured to calculate a current working parameter based on the initial working parameter, where the current working parameter includes a current air volume of the range hood and a current resistance coefficient of a pipeline of the range hood;
the second calculating unit 30 is configured to calculate a target rotation speed of the motor of the range hood based on the current working parameter under the condition that the current air volume of the range hood is different from the target air volume;
and the control unit 40 is used for controlling the motor of the range hood to work according to the target rotating speed so as to enable the air outlet speed of the range hood to be constant.
In the application, because in the existing method for controlling the constant air volume of the range hood, an iterative algorithm is generally needed to be used when the rotating speed needed when the motor of the range hood realizes the constant air volume is calculated, the calculation complexity is high, in the application, only the current rotating speed of the motor of the range hood needs to be collected, the rotating speed needed when the constant air volume is realized can be calculated at one time by the current backpressure of a public flue and the current outlet static pressure of a pipeline of the range hood, the purpose of simplifying the calculation complexity is achieved, the technical problem that the method for controlling the constant air volume of the range hood in the prior art is complex is solved, and the technical effect of improving the real-time performance of controlling the constant air volume of the range hood is realized.
Preferably, the collecting unit includes: and the monitoring circuit is used for acquiring the current back pressure of the common flue sent by the first pressure sensor, the current outlet static pressure of the range hood pipeline sent by the second pressure sensor and the current rotating speed of the range hood motor sent by the range hood running program after the range hood obtains the constant air volume control command.
Preferably, the first calculation unit includes: the wind resistance analysis circuit is used for calculating the current resistance coefficient of the pipeline of the range hood based on the initial working parameters; and the air volume determining circuit is used for calculating the current air volume of the range hood based on the initial working parameters.
Preferably, the second calculation unit includes: the current air quantity comparison circuit is used for determining whether the current air quantity of the range hood is the same as the target air quantity; and the rotating speed calculating circuit is used for calculating the target rotating speed of the motor of the range hood based on the current working parameters under the condition that the current air quantity of the range hood is different from the target air quantity.
The control device for controlling the constant air volume of the range hood will be described in detail with reference to fig. 4.
Firstly, the acquisition unit mainly comprises a monitoring circuit 401 in the range hood, the first calculation unit comprises a wind resistance analysis circuit 402 and a wind quantity determination circuit 404, and the second calculation unit comprises a current wind quantity comparison circuit 403 and a rotating speed calculation circuit 405.
The control device for the constant air volume of the range hood comprises a monitoring circuit 401, an air resistance analysis circuit 402, a current air volume comparison circuit 403, an air volume determination circuit 404 and a rotating speed calculation circuit 405. The control device for the constant air volume of the range hood and external components transmit information, for example, relevant data are obtained from the pressure sensors 101 and 102 and the range hood operation program 300, and the control device for the constant air volume of the range hood transmits a motor rotating speed calculation instruction to the fan 500.
When the range hood is running, the two pressure sensors 101 and 102 provide the current back pressure of the common flue and the current outlet static pressure of the range hood pipeline to the monitoring circuit 401, and the range hood running program 300 provides the current fan gear and the current rotating speed of the range hood motor to the monitoring circuit 401. The monitoring circuit 401 calculates the current air volume according to the collected information, and sends the air volume and the gear information to the current air volume comparison circuit 403, the air volume comparison circuit firstly determines a target air volume value, the value is set by the system and is given by the user, and then the comparison result is sent out if the air volume meets the target air volume at the current gear. Meanwhile, the monitoring circuit 401 transmits the air volume, the rotating speed and the two pressure information to the wind resistance analysis circuit 402, and the analysis circuit calculates to obtain a wind resistance calculation formula of the current kitchen. The wind resistance analysis circuit 402 and the current wind volume comparison circuit 403 transmit the calculated result to the wind volume determination circuit 404, and the wind volume determination circuit 404 calculates the target wind volume of the range hood according to the difference of the target wind volume and the wind resistance condition, wherein the target wind volume can achieve the purpose of constant wind volume and ensure that the range hood does not overload during operation. The rotation speed calculation circuit 405 receives the target air volume obtained by the determination circuit, then calculates to obtain an adjusted rotation speed of the motor, and finally sends a rotation speed adjustment instruction to the fan 500.
Example three:
an embodiment of the present invention further provides an electronic device, including a memory and a processor, where the memory is used to store a program that supports the processor to execute the method described in the first embodiment, and the processor is configured to execute the program stored in the memory.
Referring to fig. 5, an embodiment of the present invention further provides an electronic device 100, including: the device comprises a processor 50, a memory 51, a bus 52 and a communication interface 53, wherein the processor 50, the communication interface 53 and the memory 51 are connected through the bus 52; the processor 50 is arranged to execute executable modules, such as computer programs, stored in the memory 51.
The Memory 51 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 53 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.
The bus 52 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
The memory 51 is used for storing a program, the processor 50 executes the program after receiving an execution instruction, and the method executed by the apparatus defined by the flow process disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 50, or implemented by the processor 50.
The processor 50 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 50. The Processor 50 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and completes the steps of the method in combination with the hardware thereof.
Example four:
the embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program performs the steps of the method in the first embodiment.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (17)
1. A method for controlling constant air volume of a range hood is characterized by comprising the following steps:
after the range hood acquires a constant air volume control command, acquiring initial working parameters of the range hood, wherein the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood;
calculating current working parameters based on the initial working parameters, wherein the current working parameters comprise the current air quantity of the range hood and the current resistance coefficient of a pipeline of the range hood;
if the current air volume of the range hood is different from the target air volume, calculating the target rotating speed of a motor of the range hood based on the current working parameters;
and controlling the motor of the range hood to work according to the target rotating speed so as to keep the air outlet speed of the range hood constant.
2. The method of claim 1, wherein calculating a current operating parameter based on the initial operating parameter comprises:
calculating the current air quantity of the range hood by using a relational expression of the air quantity and the rotating speed and the initial working parameters;
and calculating the current resistance coefficient of the pipeline of the range hood by using an outlet static pressure calculation formula, the current air quantity of the range hood and the initial working parameters.
3. The method of claim 2,
the relational expression of the air volume and the rotating speed is a quadratic function or a high-order function.
4. The method of claim 2,
the relational expression between the air volume and the rotating speed is Q ═ a × n2+ b + n + c, wherein Q is the air volume of the range hood, n is the rotating speed of the motor of the range hood, and a, b and c are constants;
the outlet static pressure calculation formula is P-K Q2And B, wherein P is the outlet static pressure of the range hood pipeline collected by the pressure sensor arranged at the outlet of the range hood, B is the back pressure of the common flue collected by the pressure sensor arranged at the range hood pipeline, and K is the resistance coefficient of the range hood pipeline.
5. The method according to claim 2, wherein if the current air volume of the range hood is different from the target air volume, calculating a target rotation speed of a motor of the range hood based on the current operating parameters comprises:
calculating a target outlet static pressure of the range hood pipeline based on the outlet static pressure calculation formula and the target air volume;
and calculating the target rotating speed of the motor of the range hood based on the target outlet static pressure and the outlet static pressure calculation formula.
6. The method of claim 5, wherein calculating a target speed of the range hood motor based on the target outlet static pressure and the outlet static pressure calculation formula comprises:
calculating an ideal resistance coefficient of the range hood pipeline when the back pressure of the common flue is 0 based on the target air volume and the target outlet static pressure;
and calculating the target rotating speed of the motor of the range hood based on the ideal resistance coefficient of the pipeline of the range hood.
7. The method of claim 6, wherein calculating an ideal drag coefficient for the range hood duct when the back pressure of the common flue is 0 based on the target air volume and the target outlet static pressure comprises:
and calculating an ideal resistance coefficient of the pipeline of the range hood by using the target air volume, the target outlet static pressure and a wind resistance calculation formula.
8. The method of claim 7,
the wind resistance calculation formula is that K is P/Q2。
9. The method of claim 7, wherein calculating a target rotational speed of the range hood motor based on an ideal drag coefficient of the range hood duct comprises:
based on the ideal resistance coefficient of the pipeline of the range hood, calculating intersection data of the range hood, wherein the intersection data comprise: the intersection point rotating speed of the motor of the range hood, the intersection point air quantity of the range hood and the intersection point outlet static pressure of the pipeline of the range hood;
and calculating the target rotating speed based on the intersection point data of the range hood.
10. The method of claim 9, wherein calculating intersection data for the range hood based on the ideal drag coefficient for the range hood duct comprises:
and simultaneously calculating intersection point data of the range hood by using the ideal resistance coefficient and the target function of the pipeline of the range hood and using a Fisher algorithm, wherein the target function comprises: the relational expression of the air quantity and the rotating speed, the wind resistance calculation formula and the relational expression of the pressure and the rotating speed, wherein the air quantity and the rotating speed are calculated according to the relational expressionThe relation between pressure and rotating speed is P ═ e ^ n2+ g n + h, wherein e, g and h are constants.
11. The method of claim 1, further comprising:
and if the current air volume of the range hood is the same as the target air volume, controlling the motor of the range hood to work according to the current rotating speed.
12. The utility model provides a controlling means of permanent amount of wind of lampblack absorber which characterized in that includes: a collecting unit, a first calculating unit, a second calculating unit and a control unit, wherein,
the acquisition unit is used for acquiring initial working parameters of the range hood after the range hood acquires a constant air volume control command, wherein the initial working parameters comprise the current rotating speed of a motor of the range hood, the current back pressure of a common flue and the current outlet static pressure of a pipeline of the range hood;
the first calculation unit is used for calculating current working parameters based on the initial working parameters, wherein the current working parameters comprise the current air quantity of the range hood and the current resistance coefficient of a pipeline of the range hood;
the second calculating unit is used for calculating the target rotating speed of the motor of the range hood based on the current working parameters under the condition that the current air volume of the range hood is different from the target air volume;
and the control unit is used for controlling the motor of the range hood to work according to the target rotating speed so as to ensure that the air outlet speed of the range hood is constant.
13. The apparatus of claim 12, wherein the acquisition unit comprises:
and the monitoring circuit is used for acquiring the current back pressure of the common flue sent by the first pressure sensor, the current outlet static pressure of the range hood pipeline sent by the second pressure sensor and the current rotating speed of the range hood motor sent by the range hood running program after the range hood obtains the constant air volume control command.
14. The apparatus of claim 12, wherein the first computing unit comprises: a wind resistance analyzing circuit and an air quantity determining circuit, wherein,
the wind resistance analysis circuit is used for calculating the current resistance coefficient of the pipeline of the range hood based on the initial working parameters;
and the air volume determining circuit is used for calculating the current air volume of the range hood based on the initial working parameters.
15. The apparatus of claim 12, wherein the second computing unit comprises: a current air quantity comparison circuit and a rotating speed calculation circuit, wherein,
the current air quantity comparison circuit is used for determining whether the current air quantity of the range hood is the same as the target air quantity;
and the rotating speed calculating circuit is used for calculating the target rotating speed of the motor of the range hood based on the current working parameters under the condition that the current air quantity of the range hood is different from the target air quantity.
16. An electronic device comprising a memory for storing a program that enables a processor to perform the method of any of claims 1 to 11 and a processor configured to execute the program stored in the memory.
17. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, is adapted to carry out the method of any one of the preceding claims 1 to 11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110133299.8A CN112833438A (en) | 2021-01-29 | 2021-01-29 | Method and device for controlling constant air volume of range hood |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110133299.8A CN112833438A (en) | 2021-01-29 | 2021-01-29 | Method and device for controlling constant air volume of range hood |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834176A (en) * | 2021-08-18 | 2021-12-24 | 杭州洲钜电子科技有限公司 | Constant air volume curve calibration method, control terminal of equipment and readable storage medium |
| WO2024088013A1 (en) * | 2022-10-27 | 2024-05-02 | 广东澄一科技有限公司 | Range hood |
-
2021
- 2021-01-29 CN CN202110133299.8A patent/CN112833438A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834176A (en) * | 2021-08-18 | 2021-12-24 | 杭州洲钜电子科技有限公司 | Constant air volume curve calibration method, control terminal of equipment and readable storage medium |
| WO2024088013A1 (en) * | 2022-10-27 | 2024-05-02 | 广东澄一科技有限公司 | Range hood |
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