CN114234249B - Control method and device for identifying flue state - Google Patents
Control method and device for identifying flue state Download PDFInfo
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- CN114234249B CN114234249B CN202111555099.8A CN202111555099A CN114234249B CN 114234249 B CN114234249 B CN 114234249B CN 202111555099 A CN202111555099 A CN 202111555099A CN 114234249 B CN114234249 B CN 114234249B
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims description 10
- 238000003491 array Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The embodiment of the invention provides a control method and a device for identifying a flue state, which are applied to a range hood, wherein a motor is arranged on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the control method comprises the following steps: under different gear air volumes, current values of the motor under different working current errors are collected every preset time, so that a threshold current curve graph under different gear air volumes is constructed; acquiring an actual current graph group under different gear air volumes; obtaining a reference current according to an actual current curve graph group and a threshold current curve graph under different gear air volumes; collecting actual measurement current at the current moment, comparing the actual measurement current at the current moment with a reference current, and identifying the state of the flue according to a comparison result; therefore, whether the flue is unobstructed or not is accurately judged, and the judgment accuracy and the user experience are improved.
Description
Technical Field
The invention relates to the technical field of intelligent household appliances, in particular to a control method and a device for identifying a flue state.
Background
When residents use the range hood in the same time period, due to the fact that the pressure fluctuation of a flue of the range hood is large, the range hood is easy to be unsmooth in some families, and the range hood cannot be discharged.
At present, the motor of many range hoods is usually a single-phase asynchronous motor, the motor works by adopting alternating current voltage, in the working process, the current value of the motor can change along with the condition of whether a flue is unobstructed, when the flue is unobstructed, the motor rotates fast, and the working current of the motor is large; when the flue is blocked, the resistance of the motor is high, the rotating speed is reduced, and at the moment, the working current of the motor is reduced. The ac motor is also characterized in that the cold state and the hot state have great influence on the motor winding, the resistance of the motor winding gradually increases in the process from the cold state to the hot state, the working current of the motor gradually decreases, and the process of stabilizing the motor from the cold state to the hot state is particularly long, generally at least 1 hour or more. When a user uses the smoke machine, the smoke machine is always used from a cold state of the motor, and when the smoke machine is used, the motor is always finished when the heat state of the motor is not reached to a steady state.
Although some range hoods consider the influence of the cold state and the hot state of the motor on the motor winding, the working current change of the motor from the cold state to the hot state is expressed by adopting a simple exponential type formula, the scientificity is lacking, the influence of working current errors of the same type of motor is not considered, the result of detecting and judging the unobstructed flue is inaccurate, the speed can be regulated by mistake due to the judgment error, and the trouble is brought to the user.
Disclosure of Invention
In view of the above, the present invention aims to provide a control method and a device for identifying a flue state, which obtain a reference current by acquiring a threshold current curve graph and an actual current curve graph set under different gear air volumes; and identifying the state of the flue according to the comparison result of the actually measured current and the reference current at the current moment, thereby accurately judging whether the flue is unobstructed or not and improving the judgment accuracy and user experience.
In a first aspect, an embodiment of the present invention provides a control method for identifying a flue state, which is applied to a range hood, where a motor is provided on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the method includes:
collecting current values of the motor under different working current errors at intervals of preset time under different gear air volumes, so as to construct a threshold current curve graph under the different gear air volumes;
acquiring an actual current curve graph group under the air quantity of different gears;
obtaining a reference current according to the actual current curve graph group and the threshold current curve graph under the different gear air volumes;
and collecting actual measurement current at the current moment, comparing the actual measurement current at the current moment with the reference current, and identifying the state of the flue according to a comparison result.
Further, collecting current values of the motor under different working current errors at intervals of preset time under different gear air volumes, so that constructing a threshold current curve graph under the different gear air volumes comprises the following steps of repeatedly executing the following processes until the motor is traversed under each working current error:
when any one of the different gear air volumes is started, collecting current values of the motor under a first working current error at intervals of a first preset time to obtain a plurality of first current values of the motor;
fitting the first current values of the motor to obtain a threshold current curve chart under the current gear air quantity.
Further, the motor is traversed at each of the operating current errors, including a transition of the motor from a cold state to a hot state and/or from the hot state to a steady state.
Further, the method further comprises:
constructing a threshold current curve graph group under different gear air volumes according to the threshold current curve graphs under different gear air volumes;
and converting the threshold current curve graph groups under the air quantity of different gears into a plurality of threshold current arrays under the air quantity of different gears.
Further, the converting the set of threshold current graphs for different gear air volumes into the plurality of sets of threshold current for different gear air volumes includes repeatedly performing the following processing until each of the sets of threshold current graphs for different gear air volumes is traversed:
a first threshold current curve chart is arbitrarily selected from the threshold current curve chart sets under the air quantity of different gears;
extracting the first threshold current curve graph to obtain a plurality of first current values corresponding to the motor under a first working current error;
the plurality of first current values form a first threshold current array.
Further, the obtaining a reference current according to the actual current curve graph set and the threshold current curve graph under the different gear air volumes includes:
determining a lower limit coefficient corresponding to the motor under different working current errors according to the actual current curve graph group and the threshold current curve graph group constructed by the threshold current curve graph under different gear air volumes;
and obtaining the reference current according to the corresponding lower limit coefficient of the motor under different working current errors and each current value in the threshold current array.
Further, the determining the corresponding lower limit coefficient of the motor under different working current errors according to the actual current curve graph set and the threshold current curve graph set constructed by the threshold current curve graph under different gear air volumes includes:
obtaining a lower limit threshold current curve graph group under the different gear air volumes according to the actual current curve graph group and the threshold current curve graph group under the different gear air volumes;
and determining a lower limit coefficient corresponding to the motor under different working current errors according to the lower limit threshold current curve graph group under different gear air volumes.
Further, the comparing the measured current at the current time with the reference current, and identifying the state of the flue according to the comparison result includes:
determining a selected threshold current array;
obtaining a reference current corresponding to the current moment according to the selected threshold current array;
if the current time is smaller than the tN time, comparing the actually measured current at the current time with the reference current corresponding to the current time;
if the measured current at the current moment is larger than the reference current corresponding to the current moment, the flue is unobstructed;
if the measured current at the current moment is smaller than the reference current corresponding to the current moment, the flue is not unobstructed.
Further, the comparing the measured current at the current time with the reference current, and identifying the state of the flue according to the comparison result includes:
if the current moment is larger than the tN moment, obtaining a reference current corresponding to the tN moment according to the selected threshold current array;
comparing the actual measured current at the current moment with the reference current corresponding to the tN moment;
if the actual measured current at the current moment is larger than the reference current corresponding to the tN moment, the flue is unobstructed;
if the measured current at the current moment is smaller than the reference current corresponding to the tN moment, the flue is not unobstructed.
Further, the method further comprises:
if the measured current at the current moment is smaller than the reference current corresponding to the current moment, starting timing under the condition that the measured current at the current moment is larger than or equal to the reference current corresponding to the current moment for the first time;
in a first preset delay time, if the measured current at the current moment is smaller than the reference current corresponding to the current moment, resetting a timer, re-timing and determining that the flue is not smooth;
and if the measured current at the current moment is greater than or equal to the reference current corresponding to the current moment, the flue is unobstructed.
Further, the method further comprises:
if the measured current at the current moment is smaller than the reference current corresponding to the tN moment, starting timing under the condition that the measured current at the current moment is larger than or equal to the reference current corresponding to the tN moment for the first time;
in a second preset delay time, if the measured current at the current moment is smaller than the reference current corresponding to the tN moment, resetting the timer, re-timing, and determining that the flue is not smooth;
and if the actually measured current at the current moment is larger than the reference current corresponding to the tN moment, the flue is unobstructed.
In a second aspect, an embodiment of the present invention provides a control device for identifying a flue state, which is applied to a range hood, where a motor is provided on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the device includes:
the acquisition unit is used for acquiring current values of the motor under different working current errors at intervals of preset time under different gear air volumes, so as to construct a threshold current curve graph under the different gear air volumes;
the actual current curve graph group acquisition unit is used for acquiring the actual current curve graph groups under the different gear air quantities;
the reference current acquisition unit is used for acquiring reference current according to the actual current curve graph group and the threshold current curve graph under the different gear air volumes;
and the comparison unit is used for collecting the actual measurement current at the current moment, comparing the actual measurement current at the current moment with the reference current, and identifying the state of the flue according to the comparison result.
In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, and a processor, where the memory stores a computer program executable on the processor, and where the processor implements a method as described above when executing the computer program.
In a fourth aspect, embodiments of the present invention provide a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the method as described above.
The embodiment of the invention provides a control method and a device for identifying a flue state, which are applied to a range hood, wherein a motor is arranged on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the control method comprises the following steps: under different gear air volumes, current values of the motor under different working current errors are collected every preset time, so that a threshold current curve graph under different gear air volumes is constructed; acquiring an actual current graph group under different gear air volumes; obtaining a reference current according to an actual current curve graph group and a threshold current curve graph under different gear air volumes; collecting actual measurement current at the current moment, comparing the actual measurement current at the current moment with a reference current, and identifying the state of the flue according to a comparison result; obtaining a reference current by obtaining a threshold current curve graph and an actual current curve graph set under different gear air volumes; and identifying the state of the flue according to the comparison result of the actually measured current and the reference current at the current moment, thereby accurately judging whether the flue is unobstructed or not and improving the judgment accuracy and user experience.
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 above objects, features and advantages of the present invention more 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 that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a control method for recognizing flue status according to a first embodiment of the present invention;
fig. 2 is a graph showing a trend of motor current with time according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a set of threshold current graphs for high-level and low-level air flows according to the first embodiment of the present invention;
FIG. 4 is a graph of actual current and a graph of threshold current at a constant air volume according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a control device for identifying a flue state according to a second embodiment of the present invention.
Icon:
1-an acquisition unit; 2-an actual current graph group acquisition unit; 3-a reference current acquisition unit; 4-comparison unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, 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 embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to facilitate understanding of the present embodiment, the following describes embodiments of the present invention in detail.
Embodiment one:
fig. 1 is a flowchart of a control method for identifying a flue state according to an embodiment of the present invention.
Referring to fig. 1, the method is applied to a range hood, a motor is arranged on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the method comprises the following steps:
step S101, under different gear air volumes, current values of the motor under different working current errors are collected every preset time, so that a threshold current curve graph under different gear air volumes is constructed;
step S102, acquiring an actual current curve graph group under different gear air volumes;
step S103, obtaining a reference current according to an actual current curve graph group and a threshold current curve graph under different gear air volumes;
step S104, collecting actual measurement current at the current moment, comparing the actual measurement current at the current moment with a reference current, and identifying the state of the flue according to the comparison result.
The effect of the cold and hot states of the motor needs to be taken into account when detecting the motor current. Referring to fig. 2, a trend of the operating current of the motor from a cold state to a hot state at a low-stage air volume and a high-stage air volume is shown as time-dependent. When the air quantity is low, the motor rotating speed is low, and the overall motor current is low; when the air quantity is high, the motor rotating speed is high, the overall motor current is high, but the change trend of the motor current along with time is the same.
Further, the different gear air volumes include one or more of a high-grade air volume, a low-grade air volume and a quick-fried gear, and the step S101 includes the following steps, and the following processes are repeatedly executed until the motor is traversed under each working current error:
step S201, when any one of air volumes of different gears is started, current values under a first working current error of the motor are acquired every first preset time, and a plurality of first current values of the motor are obtained;
step S202, fitting a plurality of first current values of the motor to obtain a threshold current curve chart under the current gear air quantity.
Further, the motor is traversed at each operating current error, including the motor going from a cold state to a hot state and/or from a hot state to a steady state.
Further, the method comprises the following steps:
step S301, constructing a threshold current curve graph group under different gear air volumes according to threshold current curve graphs under different gear air volumes;
step S302, converting the threshold current curve graph sets under different gear air volumes into a plurality of threshold current arrays under different gear air volumes.
Further, step S302 includes the step of repeatedly performing the following processing until each threshold current graph for different gear air volumes is traversed:
step S401, arbitrarily selecting a first threshold current curve chart from a threshold current curve chart set under different gear air volumes;
step S402, extracting a first threshold current curve graph to obtain a plurality of first current values corresponding to the motor under the first working current error;
in step S403, the plurality of first current values form a first threshold current array.
Specifically, the different gear air volumes include one or more of a high-grade air volume, a low-grade air volume and a quick-fried gear, and the high-grade air volume and the low-grade air volume are taken as examples for illustration.
Under the condition that a flue of the range hood is unobstructed, detecting and recording a motor current value (the current value is converted by the MCU through AD) at intervals of preset time by the MCU of the range hood, constructing a threshold current curve graph group under different gear air volumes according to the recorded motor current value, converting the threshold current curve graph group under different gear air volumes into a plurality of threshold current arrays under different gear air volumes, and storing the threshold current curve graph group into the MCU or a memory. Considering that the consistency of the direct current resistance parameters and the working current parameters of the motors of the same type is not good, the general maximum error is +/-10%, so that the threshold current curve graphs cannot be determined by extracting one motor, and a plurality of threshold current curve graphs are required to be established on the high-grade air quantity and the low-grade air quantity to form a threshold current curve graph group so as to more accurately measure and judge whether the flue is unobstructed.
Referring to fig. 3, the working current errors of the selection motor are-10%, -5%, 0%, 5% and 10%, respectively, and the selection motor is respectively installed into the whole machine, and under the condition that the flue is unobstructed, the creation of the threshold current curve graph group under the high-grade air quantity and the creation of the threshold current curve graph group under the low-grade air quantity are carried out, and the finer the working current error of the motor is, the more curves in the graph group are, and the more accurate the measurement and judgment of whether the flue is unobstructed are carried out. The above-described division of the operating current error is not limited, and more divisions are also possible.
After the high-grade air quantity or the low-grade air quantity is started from the cold state of the motor, when the motor enters a steady state from the cold state to the hot state and from the hot state, collecting current values of the motor under a first working current error every a first preset time t, obtaining a plurality of first current values of the motor, namely N first current values, wherein the last recorded current value is the current value entering the steady state for the first time. Where tN-t (N-1) = Δt, the recorded time points are t1, t2 … tN. And repeatedly executing the steps after the current value under the first working current error is obtained, so as to obtain the current value under the second working error, and finally obtaining the threshold current graphs corresponding to all the working current errors under different air volumes.
Fitting a plurality of first current values of the motor to obtain a threshold current curve graph under the current gear air quantity, so that 5 threshold current curve graphs are arranged under the high-grade air quantity; under low-gear air quantity, 5 threshold current graphs are also provided; the threshold current curve is fitted according to the current value actually tested, and cannot be expressed by a simple function, the fitted threshold current time point is consistent with the time point of recording the actually measured current value, namely t1 and t2 … tN, and the time interval is tN-t (N-1) = Δt. The more the value N is, the smaller the time interval Deltat is, the denser the collected points are, and the closer the fitted current curve graph is to reality when the steady state is firstly entered from the cold state to the hot state and from the hot state.
Since the motor current changes from cold state to hot state, although the overall trend is from large to small to stable, the actual current waveform will fluctuate up and down along the fitted typical threshold current waveform, for example, using a motor with an error of 5%, the smoke machine MCU detects and records the motor current value in real time at a certain air volume gear, and fits the typical threshold current graph according to the recorded current value, referring specifically to fig. 4.
In addition, the plurality of threshold current arrays are converted from the threshold current graph sets. Under high-grade air quantity, the form of the threshold current array is An [ ] = { Gn1, gn2, gn3 … GnM }; under low-gear air quantity, the form of the threshold current array is Bn [ ] = { Dn1, dn2, dn3 … DnM }; gnM is the current value of the motor extracted from the high-grade air volume lower threshold current curve chart, dnM is the current value of the motor extracted from the low-grade air volume lower threshold current curve chart, N is the number of arrays, and M is the number of current values extracted from the threshold current curve chart, wherein M is equal to N (N is the number of actually measured current values of the motor).
There are 5 graphs on the high-grade air volume, so there are 5 arrays, respectively A1[ ] (motor working current error is-10%), A2[ ] (motor working current error is-5%), A3[ ] (motor working current error is 0%), A4[ ] (motor working current error is 5%), A5[ ] (motor working current error is 10%); there are also 5 arrays on the low-gear air volume, respectively B1[ ] (motor working current error is-10%), B2[ ] (motor working current error is-5%), B3[ ] (motor working current error is 0%), B4[ ] (motor working current error is 5%), B5[ ] (motor working current error is 10%); the 10 arrays are stored in the MCU or memory.
Further, step S103 includes the steps of:
step S501, determining a corresponding lower limit coefficient of the motor under different working current errors according to an actual current curve graph set and a threshold current curve graph set constructed by a threshold current curve graph under different gear air volumes;
and obtaining the reference current according to the corresponding lower limit coefficient of the motor under different working current errors and each current value in the threshold current array.
Further, step S501 includes the steps of:
step S601, obtaining a lower limit threshold current curve graph group under different gear air volumes according to an actual current curve graph group and a threshold current curve graph group under different gear air volumes;
step S602, determining a corresponding lower limit coefficient of the motor under different working current errors according to a lower limit threshold current curve diagram set under different gear air volumes.
Specifically, different actual current curve images and threshold current curve sets are corresponding to different gear air volumes, the actual current curve sets comprise a plurality of actual current curves, and the threshold current curve sets comprise a plurality of threshold current curves. When the working current error of the motor is-10% under the condition of fixed air quantity, the corresponding actual current curve graph and the threshold current curve graph are adopted, wherein the actual current curve graph fluctuates on the threshold current curve graph, and the current values corresponding to the trough of each period on the actual current curve graph are connected, so that the lower limit threshold current curve graph is formed. And determining a lower limit coefficient according to the lower limit threshold current curve graph.
And determining the lower limit coefficient to ensure that the actually measured motor current is greater than or equal to the lower limit threshold current under the condition that the flue is unobstructed. According to the lower limit threshold current waveform diagram, each trough current value and a corresponding acquisition time point are found, according to the typical threshold current diagram, a typical threshold current value is found at the corresponding acquisition time point, then trough coefficients of each period are calculated, trough coefficients = trough current values +.typical threshold current values, and then the smallest trough coefficient is found from the trough coefficients, at the moment, the lower limit coefficient is the smallest trough coefficient, and the lower limit coefficient is not limited to the smallest trough coefficient but can be smaller than the smallest trough coefficient.
Further, step S104 includes the steps of:
step S701, determining a selected threshold current array;
specifically, the reference current is obtained according to the corresponding lower limit coefficient of the motor under different working current errors and each current value in the threshold current array. The reference current is a reference value for determining whether the flue is open.
After determining the reference current, determining a selected threshold current array according to the reference current. Before the actual shipment, the selected threshold current array needs to be determined. When the range hood is smooth and is in low-grade air quantity or high-grade air quantity, the motor starts running time from a cold state to a time t1 (the first time point when the MCU collects motor current), the MCU of the range hood measures the initial current value of the motor, and a selected threshold current array is determined according to which interval of the initial current value is in the reference current.
Step S702, obtaining a reference current corresponding to the current moment according to the selected threshold current array;
step S703, if the current time is less than the tN time, comparing the actual measured current at the current time with the reference current corresponding to the current time;
step S704, if the actual measured current at the current moment is larger than the reference current corresponding to the current moment, the flue is unobstructed;
step S705, if the actually measured current at the current moment is smaller than the reference current corresponding to the current moment, the flue is not smooth.
Further, step S104 further includes the steps of:
step S801, if the current moment is greater than the tN moment, obtaining a reference current corresponding to the tN moment according to the selected threshold current array;
step S802, comparing the actual measured current at the current moment with a reference current corresponding to the tN moment;
step S803, if the actual measured current at the current moment is larger than the reference current corresponding to the tN moment, the flue is unobstructed;
in step S804, if the measured current at the current time is less than the reference current corresponding to the tN time, the flue is not unobstructed.
Specifically, when the motor is in different states, the method for identifying whether the flue is unobstructed is the same. The motor is in an on state, is closed after being started and operated for a period of time, is opened after a period of time, and is switched between a high-grade air quantity and a low-grade air quantity in the operation process of the motor.
If the current time is smaller than the tN time, comparing the actually measured current at the current time with the reference current corresponding to the current time, specifically: and obtaining the reference current corresponding to the current moment according to the selected threshold current array. For example, in low-gear air volume, the selected threshold current array is B4[ ] (motor working current error is 5%), and the lower limit coefficient is Y4 (motor current tolerance is 5%). If the current time is t5, the acquired actually measured current is higher than the reference current D45×Y4 of the time point of t3, and the flue is judged to be unobstructed; if the current time is t8, the acquired actual measured current is lower than the reference current D48×Y4 of the time point of t8, and the flue is judged to be not smooth.
If the current time is greater than the tN time, obtaining a reference current corresponding to the tN time according to the selected threshold current array, specifically: and judging that the flue is unobstructed by the collected reference current D4N x Y4 at the time point when the actual measured current is higher than tN. When the flue is not smooth, the collected actual measured current is lower than the reference current at the same time point, but the actual measured motor current still fluctuates in real time, and only the current waveform moves downwards as a whole.
Further, the method comprises the following steps:
step S901, if the measured current at the current time is less than the reference current corresponding to the current time, starting timing when the measured current at the current time is greater than or equal to the reference current corresponding to the current time for the first time;
step S902, in a first preset delay time, if the measured current at the current moment is smaller than the reference current corresponding to the current moment, resetting the timer, re-timing, and determining that the flue is not smooth;
in step S903, if the measured current at the current time is greater than or equal to the reference current corresponding to the current time, the flue is unobstructed.
Further, the method comprises the following steps:
step S904, if the measured current at the current moment is smaller than the reference current corresponding to the tN moment, starting timing when the measured current at the current moment is larger than or equal to the reference current corresponding to the tN moment for the first time;
step S905, in a second preset delay time, if the actual measured current at the current moment is smaller than the reference current corresponding to the tN moment, resetting the timer, re-timing, and determining that the flue is not smooth;
in step S906, if the measured current at the present moment is greater than the reference current corresponding to the tN moment, the flue is unobstructed.
Here, the range hood is realized by switching the high-grade air quantity and the low-grade air quantity aiming at the speed regulation of the motor. After the actually measured current of the motor is detected, the actually measured current is compared with a set threshold current, so that the switching between the high-grade air quantity and the low-grade air quantity is realized. When the actually measured current is greater than or equal to the set threshold current, the flue is unobstructed, the low-grade air quantity is cut, and otherwise, the high-grade air quantity is cut. Actually, the actually measured current of the motor fluctuates in real time, and the set threshold current fluctuates up and down, so that the high-grade air quantity and the low-grade air quantity are frequently switched, and the user is bothered.
Based on this, a delay time is introduced on the basis of the reference current. When the measured current is smaller than the reference current at the same time point or the reference current at the time tN, judging that the flue is not smooth, and then when the measured current is larger than or equal to the reference current at the same time point for the first time, starting timing, if the measured current value is lower than the reference current at the same time point or the reference current at the time tN due to the fluctuation of the flue pressure within the preset delay time, resetting the timer at the moment, and re-timing, wherein the fluctuation of the flue pressure is larger, so that the judgment of whether the flue is not smooth is kept; if the measured current value is always larger than or equal to the reference current at the same time point or the reference current at the time tN in the preset delay time, then the flue can be judged to be unobstructed. The preset delay time can be set or fixed. The method for identifying whether the flue is unobstructed can effectively prevent frequent switching or frequent back and forth speed regulation of high-grade air quantity and low-grade air quantity.
The judging process of the smoke machine under the high-grade air quantity is the same as the judging process under the low-grade air quantity, and the description is omitted here.
Embodiment two:
fig. 5 is a schematic diagram of a control device for identifying a flue state according to a second embodiment of the present invention.
Referring to fig. 5, applied to a range hood, on which a motor is provided, different operation current errors of the motor are selected and are within a preset range, the apparatus includes:
the acquisition unit 1 is used for acquiring current values of the motor under different working current errors at intervals of preset time under different gear air volumes, so as to construct a threshold current curve graph under different gear air volumes;
the actual current curve graph group acquisition unit 2 is used for acquiring actual current curve graph groups under different gear air volumes;
a reference current obtaining unit 3, configured to obtain a reference current according to the actual current graph set and the threshold current graph under different gear air volumes;
and the comparison unit 4 is used for collecting the actual measurement current at the current moment, comparing the actual measurement current at the current moment with the reference current, and identifying the state of the flue according to the comparison result.
The embodiment of the invention provides a control method and a device for identifying a flue state, which are applied to a range hood, wherein a motor is arranged on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the control method comprises the following steps: under different gear air volumes, current values of the motor under different working current errors are collected every preset time, so that a threshold current curve graph under different gear air volumes is constructed; acquiring an actual current graph group under different gear air volumes; obtaining a reference current according to an actual current curve graph group and a threshold current curve graph under different gear air volumes; collecting actual measurement current at the current moment, comparing the actual measurement current at the current moment with a reference current, and identifying the state of the flue according to a comparison result; obtaining a reference current by obtaining a threshold current curve graph and an actual current curve graph set under different gear air volumes; and identifying the state of the flue according to the comparison result of the actually measured current and the reference current at the current moment, thereby accurately judging whether the flue is unobstructed or not and improving the judgment accuracy and user experience.
The embodiment of the invention also provides electronic equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the control method for identifying the flue state provided by the embodiment when executing the computer program.
The embodiment of the invention also provides a computer readable medium with non-volatile program code executable by a processor, wherein the computer readable medium stores a computer program, and the computer program executes the steps of the control method for identifying the flue state in the embodiment when being executed by the processor.
The computer program product provided by the embodiment of the present invention includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to perform the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment and will not be described herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific 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.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. The control method for identifying the state of the flue is characterized by being applied to a range hood, wherein a motor is arranged on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the method comprises the following steps:
collecting current values of the motor under different working current errors at intervals of preset time under different gear air volumes, so as to construct a threshold current curve graph under the different gear air volumes;
acquiring an actual current curve graph group under the air quantity of different gears;
obtaining a reference current according to the actual current curve graph group and the threshold current curve graph under the different gear air volumes;
and collecting actual measurement current at the current moment, comparing the actual measurement current at the current moment with the reference current, and identifying the state of the flue according to a comparison result.
2. The method according to claim 1, wherein the step of collecting current values of the motor at different operating current errors at intervals of a preset time under different gear air volumes, so as to construct a threshold current graph under the different gear air volumes comprises repeating the following processes until the motor is traversed at each operating current error:
when any one of the different gear air volumes is started, collecting current values of the motor under a first working current error at intervals of a first preset time to obtain a plurality of first current values of the motor;
fitting the first current values of the motor to obtain a threshold current curve chart under the current gear air quantity.
3. A control method for identifying flue conditions according to claim 2, wherein the motor is traversed at each of the operating current errors, including the process of the motor going from a cold state to a hot state and/or from the hot state to a steady state.
4. The control method for recognizing a flue state according to claim 1, characterized in that the method further comprises:
constructing a threshold current curve graph group under different gear air volumes according to the threshold current curve graphs under different gear air volumes;
and converting the threshold current curve graph groups under the air quantity of different gears into a plurality of threshold current arrays under the air quantity of different gears.
5. The method of claim 4, wherein converting the set of threshold current profiles for different gear amounts of air into the plurality of sets of threshold current for different gear amounts of air comprises repeating the following until each of the sets of threshold current for different gear amounts of air is traversed:
a first threshold current curve chart is arbitrarily selected from the threshold current curve chart sets under the air quantity of different gears;
extracting the first threshold current curve graph to obtain a plurality of first current values corresponding to the motor under a first working current error;
the plurality of first current values form a first threshold current array.
6. The method for controlling flue state recognition according to claim 1, wherein obtaining the reference current according to the actual current graph set and the threshold current graph under the different gear air volumes includes:
determining a lower limit coefficient corresponding to the motor under different working current errors according to the actual current curve graph group and the threshold current curve graph group constructed by the threshold current curve graph under different gear air volumes;
and obtaining the reference current according to the corresponding lower limit coefficient of the motor under different working current errors and each current value in the threshold current array.
7. The method for controlling flue state recognition according to claim 6, wherein determining the lower limit coefficient corresponding to the motor under different working current errors according to the actual current curve set and the threshold current curve set constructed by the threshold current curve set under the different gear air volumes comprises:
obtaining a lower limit threshold current curve graph group under the different gear air volumes according to the actual current curve graph group and the threshold current curve graph group under the different gear air volumes;
and determining a lower limit coefficient corresponding to the motor under different working current errors according to the lower limit threshold current curve graph group under different gear air volumes.
8. The method according to claim 1, wherein comparing the measured current at the present time with the reference current, and identifying the status of the stack based on the comparison result, comprises:
determining a selected threshold current array;
obtaining a reference current corresponding to the current moment according to the selected threshold current array;
if the current time is smaller than the tN time, comparing the actually measured current at the current time with the reference current corresponding to the current time;
if the measured current at the current moment is larger than the reference current corresponding to the current moment, the flue is unobstructed;
if the measured current at the current moment is smaller than the reference current corresponding to the current moment, the flue is not unobstructed.
9. The method according to claim 8, wherein comparing the measured current at the present time with the reference current, and identifying the status of the stack based on the comparison result, comprises:
if the current moment is larger than the tN moment, obtaining a reference current corresponding to the tN moment according to the selected threshold current array;
comparing the actual measured current at the current moment with the reference current corresponding to the tN moment;
if the actual measured current at the current moment is larger than the reference current corresponding to the tN moment, the flue is unobstructed;
if the measured current at the current moment is smaller than the reference current corresponding to the tN moment, the flue is not unobstructed.
10. The control method for identifying a stack condition according to claim 8, further comprising:
if the measured current at the current moment is smaller than the reference current corresponding to the current moment, starting timing under the condition that the measured current at the current moment is larger than or equal to the reference current corresponding to the current moment for the first time;
in a first preset delay time, if the measured current at the current moment is smaller than the reference current corresponding to the current moment, resetting a timer, re-timing and determining that the flue is not smooth;
and if the measured current at the current moment is greater than or equal to the reference current corresponding to the current moment, the flue is unobstructed.
11. The control method for identifying a stack condition according to claim 8, further comprising:
if the measured current at the current moment is smaller than the reference current corresponding to the tN moment, starting timing under the condition that the measured current at the current moment is larger than or equal to the reference current corresponding to the tN moment for the first time;
in a second preset delay time, if the measured current at the current moment is smaller than the reference current corresponding to the tN moment, resetting the timer, re-timing, and determining that the flue is not smooth;
and if the actually measured current at the current moment is larger than the reference current corresponding to the tN moment, the flue is unobstructed.
12. A control device for recognizing a flue state, which is characterized in that the control device is applied to a range hood, a motor is arranged on the range hood, different working current errors of the motor are selected, and the different working current errors are within a preset range, and the device comprises:
the acquisition unit is used for acquiring current values of the motor under different working current errors at intervals of preset time under different gear air volumes, so as to construct a threshold current curve graph under the different gear air volumes;
the actual current curve graph group acquisition unit is used for acquiring the actual current curve graph groups under the different gear air quantities;
the reference current acquisition unit is used for acquiring reference current according to the actual current curve graph group and the threshold current curve graph under the different gear air volumes;
and the comparison unit is used for collecting the actual measurement current at the current moment, comparing the actual measurement current at the current moment with the reference current, and identifying the state of the flue according to the comparison result.
13. An electronic device comprising a memory, a processor, the memory having stored thereon a computer program executable on the processor, characterized in that the processor implements the method of any of the preceding claims 1 to 11 when the computer program is executed.
14. A computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the method of any one of claims 1 to 11.
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