CN113280385A - Range hood control method and range hood - Google Patents
Range hood control method and range hood Download PDFInfo
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- CN113280385A CN113280385A CN202110646102.0A CN202110646102A CN113280385A CN 113280385 A CN113280385 A CN 113280385A CN 202110646102 A CN202110646102 A CN 202110646102A CN 113280385 A CN113280385 A CN 113280385A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000779 smoke Substances 0.000 claims abstract description 181
- 239000003517 fume Substances 0.000 claims abstract description 13
- 239000004071 soot Substances 0.000 claims description 27
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 230000001276 controlling effect Effects 0.000 description 26
- 238000001514 detection method Methods 0.000 description 26
- 230000000875 corresponding effect Effects 0.000 description 12
- 239000002699 waste material Substances 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
Abstract
The invention discloses a control method of a range hood and the range hood, wherein the range hood comprises a fan, and the control method comprises the following steps: s1, obtaining the oil smoke concentration value Q after the fan is startednAnd acquiring a corresponding reference oil smoke concentration value; s2, determining the oil smoke concentration value QnDifference value delta Q from reference oil smoke concentration valuenGreater than a predetermined difference value DELTA Q0If so, controlling the wind speed of the fan to increase delta V, otherwise, reducing delta V; said Δ Q0Is more than or equal to 0. According to the oil fume concentration value Q in the inventionnDifference value delta Q from reference oil smoke concentration valuenThe wind speed of the fan is controlled, the influence of individual difference, assembly error and the like of the range hood on the wind speed control is avoided, and when the difference value is delta QnGreater than a predetermined difference value DELTA Q0Then, the current oil smoke concentration value Q is shownnThe air speed of the fan is controlled to be increased, so that the oil smoke can be discharged in time; on the contrary, when the difference value is Delta QnLess than a predetermined difference Δ Q0Then, the current oil smoke concentration value Q is shownnSmaller, the wind speed of the fan is controlled to be reduced at the moment, and the wind speed can be reducedThe energy consumption of the range hood is reduced.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment, and particularly relates to a control method of a range hood and the range hood.
Background
The range hood is a kitchen appliance for purifying kitchen environment and is arranged on the upper part of a stove. The power supply of the range hood is switched on, the motor is driven, so that the wind wheel rotates at a high speed, a negative pressure area is formed in a certain space range above the stove, and indoor oil fume is sucked into the range hood.
The oil fume gas is filtered by an oil screen of the range hood, the oil fume is separated for the first time, then the oil fume enters an air duct of the range hood, the oil fume is separated for the second time by the rotation of the impeller, the oil fume in the air cabinet is acted by centrifugal force, the oil mist is condensed into oil drops, the oil drops are collected to an oil cup through an oil way, and the purified smoke is finally discharged along a fixed passage.
At present, the range hood generally has a plurality of wind speed gears, and different wind speed gears are opened according to the concentration of generated oil smoke in the cooking process. Some products exist in the market, the intelligent function of the range hood can be increased, namely, a sensor is additionally arranged in the range hood to sense oil smoke. When the oil smoke is detected, different wind speed gears are automatically opened, so that the aim of discharging the oil smoke in time is fulfilled.
However, due to individual differences and assembly errors of the sensors and the fact that oil smoke is easily accumulated on the sensors, the oil smoke concentration detected by the sensors often does not accord with the actual oil smoke concentration, the detection result is inaccurate, and the wind speed controlled according to the detection result is inaccurate. The wind speed is too low, so that the oil smoke cannot be discharged in time; the range hood has large energy consumption due to overlarge wind speed.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to solve the technical problem that the existing range hood detects inaccurate oil smoke concentration and further causes inaccurate wind speed control according to the detection result, and provides a control method of the range hood and the range hood, so that the detection result of the range hood on the oil smoke concentration is more accurate, the wind speed control of the range hood is more accurate, the oil smoke discharge efficiency is improved, and the energy consumption is reduced.
In order to solve the technical problems, the invention adopts the technical scheme that:
a control method of a range hood comprises a fan,
s1, obtaining the oil smoke concentration value Q after the fan is startednAnd obtaining the corresponding reference oil smoke concentration value,
s2, determining the oil smoke concentration value QnDifference value delta Q from reference oil smoke concentration valuenGreater than a predetermined difference value DELTA Q0Controlling the wind speed of the fan to increase delta V, and conversely, decreasing delta V; said Δ Q0≥0。
Further, in the step S2,
if the first time of obtaining the oil smoke concentration value Q1If so, the reference oil smoke concentration value is a preset value;
if the nth time obtains the oil smoke concentration value QnIf the reference soot concentration value is a preset value, or the n-k times detected soot concentration value Qn-kOr the average value Q of the oil smoke concentration values detected from 1 st time to n-k times(Q1+Q2+……Qn-k)/(n-k)N is more than or equal to 2, k is more than or equal to 1 and less than n, and both n and k are integers.
Further, the Δ V and the | [ Δ ] Qn| are in positive correlation.
Further, the preset function Δ V ═ a | Δ QnI, the coefficient a is a positive number,
in the step S2, the difference value DeltaQ is calculatednAnd substituting the function to obtain the delta V.
Further, the step S2 includes:
s21, obtaining the difference value delta QnDifference DeltaQ from the previous onen-1The difference Δ Q' between;
s22, if the difference Δ Q' is 0, the control coefficient a is not changed; if the difference value delta Q' is greater than 0, the control coefficient A is increased; if the difference DeltaQ' is less than 0, the control coefficient A is decreased.
Further, the coefficient a is positively correlated with the difference Δ Q'.
Further, a preset difference value Δ QnA database corresponding to the value of deltav,
in the step S2, the difference value Delta Q is obtainednAnd acquiring corresponding delta V from the database.
Further, the step S1 is preceded by a step S0,
s0, presetting a fume concentration value Q0Obtaining the oil smoke concentration value Q, if Q > Q0Controlling the fan to be started;
preferably, a reference oil smoke concentration value is preset, and if the difference value delta Q between the obtained oil smoke concentration value Q and the reference oil smoke concentration value is larger than Q0And controlling the fan to be started.
Further, the wind speed of the fan is started to form a positive correlation with the oil smoke concentration value Q;
preferably, the wind speed of the fan is switched on includes low, medium, high and ultrahigh gears, and the range of the oil smoke concentration value corresponding to the low, medium, high and ultrahigh gears is preset, and the step S0 includes:
s01, obtaining the oil smoke concentration value Q,
s02, judging the range of the oil smoke concentration value Q, and controlling the wind speed gear of the fan to be the wind speed gear corresponding to the range of the oil smoke concentration value.
The invention also discloses a range hood controlled by the control method in any of the technical schemes.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
According to the oil fume concentration value Q in the inventionnDifference value delta Q from reference oil smoke concentration valuenThe wind speed of the fan is controlled, so that the influence of individual difference, assembly error and the like of the range hood on the wind speed control is avoided; when difference value DeltaQnGreater than a predetermined difference value DELTA Q0Then, the current oil smoke concentration value Q is shownnThe air speed of the fan is controlled to be increased, so that the oil smoke can be discharged in time; on the contrary, when the difference value is Delta QnLess than a predetermined difference Δ Q0Then, the current oil smoke concentration value Q is shownnSmaller, the wind speed of the fan is controlled to be reduced at the moment, and the energy consumption of the range hood can be reduced。
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a flow chart of a control method of the range hood of the present invention;
FIG. 2 is a flow chart of another control method of the range hood of the present invention;
FIG. 3 is a flow chart of another control method of the range hood of the present invention;
FIG. 4 is a flow chart of another control method of the range hood of the present invention;
fig. 5 is a flow chart of another control method of the range hood of the present invention.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, 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; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 5, the invention discloses a control method of a range hood. The range hood comprises a fan, and the control method of the range hood comprises the following steps:
s1, obtaining the oil smoke concentration value Q after the fan is startednAnd acquiring a corresponding reference oil smoke concentration value;
s2, determining the oil smoke concentration value QnDifference value delta Q from reference oil smoke concentration valuenGreater than a predetermined difference value DELTA Q0Controlling the wind speed of the fan to increase delta V, and conversely, decreasing delta V; said Δ Q0≥0。
According to the oil fume concentration value Q in the inventionnDifference value delta Q from reference oil smoke concentration valuenThe wind speed of the fan is controlled, and the influence of individual difference, assembly error and the like of the range hood on the wind speed control is avoided. When difference value DeltaQnGreater than a predetermined difference value DELTA Q0Then, the current oil smoke concentration value Q is shownnThe air speed of the fan is controlled to be increased, so that the oil smoke can be discharged in time; on the contrary, when the difference value is Delta QnLess than a predetermined difference Δ Q0Then, the current oil smoke concentration value Q is shownnAnd the air speed of the fan is controlled to be reduced, so that the energy consumption of the range hood can be reduced.
As an embodiment of the present invention, as shown in fig. 1, a control method of a range hood includes the following control steps:
s11, starting the fan and presetting a difference value delta Q0And a reference soot concentration value;
s12, acquiring oil smoke concentration value Qn；
S21, calculating QnDifference value delta Q from reference oil smoke concentration valuen；
S22, judging the difference value delta QnWhether it is greater than a predetermined difference value Delta Q0；
S23, if yes, controlling the wind speed of the fan to increase by delta V;
otherwise, judging the difference value delta QnWhether or not it is less than a preset difference value Delta Q0If so, controlling the wind speed of the fan to be reduced by delta V, otherwise, repeating the steps S12 to S23 until the range hood is closed.
In this embodiment, the reference soot concentration value may be preset before the range hood leaves the factory. Specifically, the range hood is tested before leaving the factory, the range hood is used for detecting the oil smoke with known concentration to obtain an actual detection value, and the actual detection value is used for subtracting the known concentration to obtain a preset reference oil smoke concentration value.
Different range hoods may have different concentration values of reference oil smoke due to individual differences of components and installation positions of the components, and need to be separately tested and preset.
In this embodiment, if the difference is Δ QnGreater than a predetermined difference value DELTA Q0Showing the current oil smoke concentration value QnAnd at the moment, the wind speed of the fan is controlled to be increased by delta V, so that the oil smoke can be discharged in time. If the difference is DeltaQnLess than a predetermined difference Δ Q0Showing the current oil smoke concentration value QnAnd at the moment, the wind speed of the fan is controlled to be reduced by delta V, so that the oil smoke can be discharged in time, and the waste of energy caused by overlarge wind speed is avoided.
As another embodiment of the present invention, in step S2,
if the 1 st acquisition of the oil smoke concentration value Q1If so, the reference oil smoke concentration value is a preset value;
if the nth time obtains the oil smoke concentration value QnIf so, the reference oil smoke concentration value is the oil smoke concentration value Q detected at the n-k timesn-kN is more than or equal to 2, k is more than or equal to 1 and less than n, and both n and k are integers.
In this embodiment, the reference soot concentration value is the soot concentration value Q detected at the n-k timesn-kWherein n is more than or equal to 2, k is more than or equal to 1 and less than n, and both n and k are integers. Namely, the reference oil smoke concentration value is the previously detected oil smoke concentration value. The oil smoke concentration value Q obtained by calculationnDifference value delta Q from previously detected oil smoke concentration valuenAnd the change rule of the current oil smoke concentration can be more accurately shown.
In this embodiment, if Δ QnGreater than a predetermined difference value DELTA Q0The oil smoke concentration is larger, at the moment, the air speed of the fan is controlled to be increased, and the oil smoke discharge efficiency can be further improved. On the contrary, if Δ QnLess than a predetermined difference Δ Q0The oil smoke concentration is small, and at the moment, the air speed of the fan is controlled to be reduced, so that energy consumption can be saved.
As an implementation manner of this embodiment, as shown in fig. 2, the control method of the range hood includes the following control steps:
s11, starting the fan and presetting a difference value delta Q0And a reference soot concentration value;
s12, acquiring oil smoke concentration value Q for the 1 st time1；
S21, calculating Q1Difference value delta Q from reference oil smoke concentration valuen；
S22, judging the difference value delta QnWhether it is greater than a predetermined difference value Delta Q0；
S23, if yes, controlling the wind speed of the fan to increase by delta V;
otherwise, judging the difference value delta QnWhether or not it is less than a preset difference value Delta Q0If so, controlling the wind speed of the fan to be reduced by delta V, otherwise, executing the step S24;
s24, acquiring oil smoke concentration value Q againn；
S25, calculating QnAnd Q1Difference value Δ Q ofn(ii) a And repeating the steps S22 to S25 until the range hood is closed.
In this embodiment, the first time of obtaining the soot concentration value Q1Then, the reference oil smoke concentration value is a preset value to ensure the difference value delta Q obtained in the 1 st timenIs not affected by the shadow of the range hoodAnd sounding is carried out, so that the accuracy of wind speed control is ensured.
When the oil smoke concentration value Q is obtained againnThen, the oil smoke concentration value Q obtained in the 1 st time1For reference of the concentration value of the oil fume, the difference value Delta Q is obtainednGreater than a predetermined difference value DELTA Q0And (3) when the oil smoke concentration value is larger than the oil smoke concentration value detected at the 1 st time, controlling the wind speed of the fan to increase delta V, and facilitating timely discharging the oil smoke.
On the contrary, when the obtained difference value is Delta QnLess than a predetermined difference Δ Q0And meanwhile, the oil smoke concentration value is smaller than the oil smoke concentration value detected at the 1 st time, the wind speed of the fan is controlled to be reduced by delta V, and the energy consumption of the range hood is reduced.
As another implementation manner of this embodiment, as shown in fig. 3, the method for controlling a range hood includes the following steps:
s11, starting the fan and presetting a difference value delta Q0And a reference soot concentration value;
s12, acquiring oil smoke concentration value Q for the 1 st time1；
S21, calculating Q1Difference value delta Q from reference oil smoke concentration valuen；
S22, judging the difference value delta QnWhether it is greater than a predetermined difference value Delta Q0；
S23, if yes, controlling the wind speed of the fan to increase by delta V;
otherwise, judging the difference value delta QnWhether or not it is less than a preset difference value Delta Q0If so, controlling the wind speed of the fan to be reduced by delta V, otherwise, executing the step S24;
s24, acquiring oil smoke concentration value Q againnRecording the previously obtained oil smoke concentration value Qn-1；
S25, calculating QnAnd Qn-1Difference value Δ Q ofn(ii) a And repeating the steps S22 to S25 until the range hood is closed.
In this embodiment, the first time of obtaining the soot concentration value Q1Then, the reference oil smoke concentration value is a preset value to ensure the difference value delta Q obtained in the 1 st timenThe wind speed control device is not influenced by the range hood, and the accuracy of wind speed control is ensured.
When the oil smoke concentration value Q is obtained againnThe oil smoke concentration value Q is obtained in the (n-1) th timen-1Is a reference soot concentration value. When the obtained difference value DeltaQnGreater than a predetermined difference value DELTA Q0And when the concentration value of the oil smoke is larger than that of the oil smoke detected at the previous time, the wind speed of the fan is controlled to be increased by delta V, and the oil smoke is discharged in time.
On the contrary, when the obtained difference value is Delta QnLess than a predetermined difference Δ Q0And when the concentration value of the oil smoke is smaller than the concentration value of the oil smoke detected at the previous time, controlling the wind speed of the fan to reduce delta V and reducing the energy consumption of the range hood.
In this embodiment, when the nth time obtains the soot concentration value QnIn the process, the oil smoke concentration value detected at the 2 nd, 3 rd and 4 th times of 4 … … k can be used as a reference oil smoke concentration value, wherein k is less than n, and a plurality of selectable schemes are provided for the control method of the invention.
As another embodiment of the present invention, as shown in FIG. 4, the reference soot concentration value is the average value Q of the soot concentration values detected from 1 st to n-k times(Q1+Q2+……Qn-k)/(n-k)。
The method specifically comprises the following control steps:
s11, starting the fan and presetting a difference value delta Q0And a reference soot concentration value;
s12, acquiring oil smoke concentration value Q for the 1 st time1；
S21, calculating Q1Difference value delta Q from reference oil smoke concentration valuen；
S22, judging the difference value delta QnWhether it is greater than a predetermined difference value Delta Q0；
S23, if yes, controlling the wind speed of the fan to increase by delta V;
otherwise, judging the difference value delta QnWhether or not it is less than a preset difference value Delta Q0If so, controlling the wind speed of the fan to be reduced by delta V, otherwise, executing the step S24;
s24, acquiring oil smoke concentration value Q againn(ii) a Calculating the average value Q of the oil smoke concentration values detected from 1 st time to n-1 st time(Q1+Q2+……Qn-1)/(n-1)；
S25、Calculating QnAnd Q(Q1+Q2+……Qn-1)/(n-1)Difference value Δ Q ofn(ii) a And repeating the steps S22 to S25 until the range hood is closed.
In this embodiment, the average value Q of the previously detected soot concentration values(Q1+Q2+……Qn-1)/(n-1)As the reference oil smoke concentration value, the adverse effect on the wind speed control of the invention caused by inaccurate or large deviation of the detection result of the individual oil smoke concentration value is avoided.
When Δ QnGreater than Δ Q0Then, the current oil smoke concentration value Q is shownnThe value of the concentration of the oil smoke is larger than the average value of the concentration of the oil smoke detected in advance, namely the current concentration of the oil smoke is larger, and the air speed of the fan is controlled to be increased, so that the oil smoke can be removed as soon as possible, and the accumulation of the oil smoke is reduced. When Δ QnLess than DeltaQ0Then, the current oil smoke concentration value Q is shownnAnd the air speed of the fan is controlled and reduced, and the energy consumption of the range hood is further reduced.
As another embodiment of the present invention, the wind speed variation Δ V and Δ Q of the wind turbine aren| are in positive correlation. At Δ QnGreater than Δ Q0In the case of (1), Δ QnThe larger the wind speed is, the larger the increase amount Δ V of the wind speed of the fan is. At Δ QnLess than DeltaQ0In the case of (1), Δ QnThe smaller the wind speed, the larger the reduction quantity delta V of the wind speed of the fan. In this embodiment Δ V follows Δ Q0The adaptability is increased or reduced, the oil smoke can be discharged in time, and the increase of the wind speed can not be overlarge, so that the energy consumption of the range hood is avoided from being overlarge.
As an embodiment of this embodiment, as shown in fig. 5, the preset function Δ V ═ a | Δ Q is set as shown in fig. 5nAnd the coefficient A is a positive number. In the step S2, the difference value DeltaQ is calculatednSubstituting into said function, the increase or decrease Δ V of the wind speed is obtained.
Specifically, the method comprises the following control steps:
s11, starting the fan and presetting a difference value delta Q0And a reference soot concentration value;
s12, acquiring oil smoke concentration value Q for the 1 st time1；
S21, calculating Q1Difference value delta Q from reference oil smoke concentration valuen；
S22, judging the difference value delta QnWhether it is greater than a predetermined difference value Delta Q0；
S23, if yes, the difference value delta QnSubstituting Δ V ═ a | Δ QnIn the step I, obtaining delta V, and controlling the wind speed of the fan to increase the delta V;
otherwise, judging the difference value delta QnWhether or not it is less than a preset difference value Delta Q0If yes, the difference value Delta Q is calculatednSubstituting Δ V ═ a | Δ QnIn |, obtaining Δ V, and controlling the wind speed of the fan to reduce Δ V, otherwise, executing the step S24;
s24, acquiring oil smoke concentration value Q againnRecording the previously obtained oil smoke concentration value Qn-1；
S25, calculating QnAnd Qn-1Difference value Δ Q ofn(ii) a And repeating the steps S22 to S25 until the range hood is closed.
In the present embodiment, Δ V ═ a | Δ QnThe delta V obtained by the operation formula of the embodiment can discharge the oil smoke as soon as possible, and the waste of energy caused by overlarge wind speed is avoided.
As another embodiment of the present invention, the step S2 includes:
obtaining a difference value DeltaQnDifference DeltaQ from the previous onen-1The difference Δ Q' between; wherein the previous difference Δ Qn-1The oil smoke concentration value Q detected at the previous detection momentn-1Difference value with reference oil smoke concentration value;
if the difference value delta Q' is equal to 0, the control coefficient A is unchanged; if the difference value delta Q' is greater than 0, the control coefficient A is increased; if the difference DeltaQ' is less than 0, the control coefficient A is decreased.
The method specifically comprises the following steps:
s11, starting the fan and presetting a difference value delta Q0And a reference soot concentration value;
s12, acquiring oil smoke concentration value Q for the 1 st time1；
S21, calculating Q1Difference value delta Q from reference oil smoke concentration valuen；
S22, judging the difference value delta QnWhether it is greater than a predetermined difference value Delta Q0；
S23, if Δ QnIs greater than a predetermined difference value DeltaQ0Calculating the difference value DeltaQnDifference DeltaQ from the previous onen-1The difference between Δ Q',
when the difference DeltaQ' is equal to 0, the difference DeltaQ is setnSubstituting Δ V ═ a | Δ QnIn |, Δ V is obtained,
when the difference DeltaQ' is greater than 0, the difference DeltaQ is measurednSubstituting Δ V ═ (a + Δa) | Δ QnIn |, Δ V is obtained,
when the difference DeltaQ' is less than 0, the difference DeltaQ is setnSubstituting Δ V ═ (a- Δ a) | Δ QnIn the step I, obtaining delta V, and controlling the wind speed of the fan to increase the delta V;
if Δ QnIs less than a predetermined difference value DeltaQ0Calculating the difference value DeltaQnDifference DeltaQ from the previous onen-1The difference between Δ Q',
when the difference DeltaQ' is equal to 0, the difference DeltaQ is setnSubstituting Δ V ═ a | Δ QnIn |, Δ V is obtained;
when the difference DeltaQ' is greater than 0, the difference DeltaQ is measurednSubstituting Δ V ═ (a + Δa) | Δ QnIn |, Δ V is obtained;
when the difference DeltaQ' is less than 0, the difference DeltaQ is setnSubstituting Δ V ═ (a- Δ a) | Δ QnIn |, Δ V is obtained;
controlling the wind speed of the fan to reduce delta V; otherwise, executing step S24;
s24, acquiring oil smoke concentration value Q againnRecording the previously obtained oil smoke concentration value Qn-1；
S25, calculating QnAnd Qn-1Difference value Δ Q ofn(ii) a And repeating the steps S22 to S25 until the range hood is closed.
In the present embodiment, the difference Δ QnGreater than a predetermined difference value DELTA Q0If the difference value DeltaQ' is greater than 0, the oil smoke concentration value is increased, and the increase of the oil smoke concentration value is increased; at this time, the control coefficient a is increased so that the calculation is performedThe obtained delta V is larger, and the high-efficiency reduction of the concentration of the oil smoke is facilitated. On the contrary, if the value of the oil smoke concentration is less than 0, the value of the oil smoke concentration is increased, but the increment of the value of the oil smoke concentration is smaller, and at the moment, the coefficient A is controlled to be reduced, so that the calculated value of the delta V is relatively smaller, and the waste of wind energy caused by too large increase of wind speed is avoided.
As an implementation manner of this embodiment, the coefficient a is in positive correlation with the difference Δ Q'. The arrangement mode can not only enable oil smoke to be discharged in time, but also avoid the waste of wind energy caused by overlarge wind speed.
As another embodiment of the present invention, the difference Δ Q is presetnA database corresponding to Δ V, and in step S2, a difference Δ Q is obtained from the databasenThe corresponding wind speed increase amount Δ V is obtained from the database.
In the present embodiment, each Δ QnThe wind speed variation quantity delta V is corresponding to the wind speed variation quantity delta V, and the wind speed can be controlled and adjusted in real time according to the actual oil smoke concentration value, so that the accumulation of oil smoke is avoided, and the waste of wind energy is avoided.
As another embodiment of the present invention, the step S1 is preceded by a step S0,
s0, presetting a fume concentration value Q0Obtaining the oil smoke concentration value Q, if Q > Q0Controlling the fan to be started; otherwise, the fan is controlled to keep a closed state.
In this embodiment, after the oil smoke concentration value that acquires reaches the default, also after the oil smoke concentration in the environment reaches certain degree, control fan opens, effectively discharges the oil smoke in the environment, has realized the intelligent start-up of fan, has promoted user experience.
As an implementation manner of this embodiment, a reference soot concentration value is preset, and if a difference Δ Q between an obtained soot concentration value Q and the reference soot concentration value is greater than the preset soot concentration value Q0And controlling the fan to be started.
The reference oil smoke concentration value in the embodiment is a factory-leaving set value, and different range hoods may have different reference oil smoke concentration values due to individual differences of components and installation positions, and need to be individually tested and preset.
In the present embodiment, the difference Δ Q is compared with a predetermined soot concentration value Q0The fan is controlled to be started, so that the range hood is prevented from having adverse effects on oil smoke detection results, and the air speed controlled according to the oil smoke detection results is more accurate.
As another implementation manner of this embodiment, the wind speed at which the fan is turned on has a positive correlation with the soot concentration value Q. Specifically, the larger the oil smoke concentration value Q is, the larger the wind speed at which the fan is turned on is.
In the embodiment, the wind speed of the fan is in positive correlation with the oil smoke concentration value Q, so that the range hood can discharge oil smoke and cannot waste wind energy.
As another implementation manner of this embodiment, the wind speed of the fan includes low, medium, high and ultrahigh gears, preset ranges of soot concentration values corresponding to the low, medium, high and ultrahigh gears,
step S1 includes:
s01, obtaining the oil smoke concentration value Q,
and S02, judging the range of the current oil smoke concentration value Q, and controlling the wind speed gear of the fan to be the wind speed gear corresponding to the range of the oil smoke concentration value.
Further specifically, if the obtained oil smoke concentration value Q belongs to the interval of 0-12, controlling the fan to be started, and controlling the wind speed to be a low gear; if the obtained oil smoke concentration value Q belongs to the range of 13-23, controlling the fan to be started, and setting the wind speed to be a middle gear; if the obtained oil smoke concentration value Q belongs to the interval of 24-34, controlling the fan to be started, and controlling the air speed to be at a high level; and if the acquired oil smoke concentration value Q belongs to the range of 35-99, controlling the fan to be started, and enabling the wind speed to be an ultrahigh gear.
In this embodiment, according to the oil smoke concentration value range in which the oil smoke concentration value Q is located, the gear of the corresponding fan is selected, so that the selection of the fan gear is more reasonable.
The invention also provides a range hood which is controlled by adopting the control method in any one of the embodiments or by adopting the control method combined with the embodiments.
The range hood avoids the interference of components of the range hood on oil smoke detection, so that the detected oil smoke concentration value can more accurately represent the current oil smoke concentration. The wind speed of the fan controlled according to the oil smoke concentration is more accurate, so that the oil smoke can be discharged in time, and the waste of wind energy can be avoided.
As an embodiment of the present invention, a range hood includes:
the fan is used for forming a negative pressure environment;
the oil smoke detection device is used for detecting an oil smoke concentration value;
and the control system is electrically connected or in communication connection with the oil smoke detection device and the fan and is used for controlling the on-off and the wind speed of the fan according to the oil smoke concentration detected by the oil smoke detection device.
In this embodiment, according to the oil smoke concentration value control fan that oil smoke detection device detected open, close and the wind speed for the intelligent degree of control of fan is higher, and controls more accurately.
Further, the oil smoke detection device is a photoelectric sensor. The photoelectric sensor is a sensor using a photoelectric element as a detection element.
The photoelectric sensor comprises a detection light emitting device and a detection light receiving device, wherein the detection light emitting device emits detection light, the detection light receiving device receives the detection light, the intensity of the received detection light changes after the received detection light is refracted by a substance to be measured (such as oil smoke concentration), and then the intensity signal of the light is further converted into an electric signal by virtue of a photoelectric element.
The photoelectric detection method has the advantages of high precision, quick response, non-contact and the like, and the sensor has the advantages of multiple measurable parameters, simple structure and flexible and various forms.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A control method of a range hood comprises a fan and is characterized in that:
s1, obtaining the oil smoke concentration value Q after the fan is startednAnd acquiring a corresponding reference oil smoke concentration value;
s2, if the obtained oil smoke concentration value QnDifference value delta Q from reference oil smoke concentration valuenGreater than a predetermined difference value DELTA Q0Controlling the wind speed of the fan to increase delta V, and conversely, decreasing delta V; said Δ Q0≥0。
2. The control method of a range hood according to claim 1, characterized in that: in the step S2, in the above step,
if the 1 st acquisition of the oil smoke concentration value Q1If so, the reference oil smoke concentration value is a preset value;
if the nth time obtains the oil smoke concentration value QnIf the reference soot concentration value is a preset value, or the n-k times detected soot concentration value Qn-kOr the average value Q of the oil smoke concentration values detected from 1 st time to n-k times(Q1+Q2+……Qn-k)/(n-k)N is more than or equal to 2, k is more than or equal to 1 and less than n, and both n and k are integers.
3. The control method of a range hood according to claim 1, characterized in that: the delta V and the delta Qn| are in positive correlation.
4. The control method of a range hood according to claim 3, wherein: presetting function delta V ═ A | delta QnI, the coefficient a is a positive number,
in the step S2, the difference value DeltaQ is calculatednAnd substituting the function to obtain the delta V.
5. The control method of a range hood according to claim 4, wherein: the step S2 includes:
s21, obtaining the difference value delta QnDifference DeltaQ from the previous onen-1The difference Δ Q' between;
s22, if the difference Δ Q' is 0, the control coefficient a is not changed; if the difference value delta Q' is greater than 0, the control coefficient A is increased; if the difference DeltaQ' is less than 0, the control coefficient A is decreased.
6. The control method of a range hood according to claim 5, wherein: the coefficient A is in positive correlation with the difference value delta Q'.
7. The control method of a range hood according to claim 3, wherein: predetermined difference value DeltaQnA database corresponding to the value of deltav,
in the step S2, the difference value Delta Q is obtainednAnd acquiring corresponding delta V from the database.
8. The control method of a range hood according to claim 1, characterized in that: the step S1 is preceded by a step S0,
s0, presetting a fume concentration value Q0Obtaining the oil smoke concentration value Q, if Q > Q0Controlling the fan to be started;
preferably, a reference oil smoke concentration value is preset, and if the difference value delta Q between the obtained oil smoke concentration value Q and the reference oil smoke concentration value is larger than Q0And controlling the fan to be started.
9. The control method of a range hood according to claim 8, wherein: the wind speed of the fan is in positive correlation with the oil smoke concentration value Q;
preferably, the wind speed of the fan is in positive correlation with the difference value delta Q;
preferably, the wind speed of the fan is switched on includes low, medium, high and ultrahigh gears, and the range of the oil smoke concentration value corresponding to the low, medium, high and ultrahigh gears is preset, and the step S0 includes:
s01, acquiring an oil smoke concentration value Q;
s02, judging the range of the oil smoke concentration value Q, and controlling the wind speed gear of the fan to be the wind speed gear corresponding to the range of the oil smoke concentration value.
10. A range hood, its characterized in that: controlled by the control method of any one of claims 1 to 9.
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| CN202110646102.0A CN113280385A (en) | 2021-06-10 | 2021-06-10 | Range hood control method and range hood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704861A (en) * | 2022-03-29 | 2022-07-05 | 广东万和热能科技有限公司 | Control method and device of range hood and range hood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704861A (en) * | 2022-03-29 | 2022-07-05 | 广东万和热能科技有限公司 | Control method and device of range hood and range hood |
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