CN112013435B - Self-cleaning detection method of range hood based on direct current motor drive - Google Patents
Self-cleaning detection method of range hood based on direct current motor drive Download PDFInfo
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- CN112013435B CN112013435B CN201910462854.4A CN201910462854A CN112013435B CN 112013435 B CN112013435 B CN 112013435B CN 201910462854 A CN201910462854 A CN 201910462854A CN 112013435 B CN112013435 B CN 112013435B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 84
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 235000006694 eating habits Nutrition 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a self-cleaning detection method of a range hood based on direct current motor drive, which considers the problem that the direct current motors configured for various range hoods after leaving factory often have difference, and processes a quotient between a threshold current measured value obtained by processing and a factory current value of a range hood for test, and then processes a product of the quotient and the factory current value corresponding to the range hood after leaving factory, so that each obtained self-cleaning reminding current value is automatically adapted to the range hood after leaving factory requiring judgment and cleaning, thereby avoiding the idealized problem and inaccurate detection problem caused by ideally setting the same threshold value for cleaning conditions of different range hoods in the traditional method. Therefore, the self-cleaning reminding current value obtained by the range hood after leaving the factory is more targeted and personalized, and the problem of inaccuracy caused by self-cleaning reminding detection of the range hood due to different direct current motors is effectively solved.
Description
Technical Field
The invention relates to the field of range hoods, in particular to a range hood self-cleaning detection method based on direct current motor driving.
Background
In the current kitchen equipment field, the range hood has become an indispensable device more and more, and is accepted by the vast users. The range hood with the direct current motor is a popular range hood for users.
Due to the special working environment rich in oil smoke in the kitchen where the range hood is located, a large amount of pollutants (mainly oil stains) can be attached to the range hood after the range hood operates for a period of time, and the working efficiency of the range hood is seriously affected.
In order to timely judge the time when the range hood needs cleaning reminding, the method for judging the cleaning reminding of the range hood at present mainly comprises three methods:
the first method is that the operation time of a fan in the range hood is judged, when the operation time of the fan is greater than a set time threshold, the range hood is judged to need to be cleaned, and the range hood carries out cleaning function reminding at the moment;
secondly, a pollutant sensor is arranged at a fan of the range hood, the accumulated amount (mainly weight condition) of pollutants is sampled in real time, when the accumulated amount of the pollutants obtained by sampling is larger than a set threshold value, the range hood is judged to need to be cleaned, and the range hood carries out cleaning function reminding at the moment;
the third is to judge the amount of the fan pollutants by monitoring the air quantity of the air outlet of the range hood, namely when the fan impeller of the fan is in a clean state, the rotating speed of the fan is higher, and the air quantity of the air outlet is higher; when oil stain attachments on the fan impeller are more, the rotating speed of the impeller is lower, and the air quantity of the air outlet is lower; when the air quantity of the air outlet at the same gear is smaller than the set air quantity threshold value, the range hood is judged to need cleaning, and the range hood carries out cleaning function reminding at the moment.
Although the above three methods for determining the cleaning reminding of the range hood are also suitable for determining the cleaning reminding of the range hood with the dc motor, the above three methods have the following disadvantages:
the first method is to judge according to the running time of a fan of the range hood, but does not consider the catering habits of users. For example, in the same fan operation time, the amount of oil stain attached to a range hood used by a user who likes light foods is often obviously less than that of a range hood used by a user who likes greasy foods, so that under the condition of the same set time threshold, the users are reminded to clean too early or too late by the range hoods used by users with different eating habits, and the range hood cleaning reminding based on the method is not accurate enough;
the second method is to monitor the oil stain attachment amount on the range hood through a sensor, but the sensor needs to be powered in real time to achieve the effect of monitoring the range hood in real time, so that the method needs to consume higher hardware installation cost, consumes more electric quantity due to continuous power supply to the sensor, and does not meet the development target of green energy conservation.
The third method is to arrange an air quantity sensor at an air outlet, and the problems of high cost and high energy consumption are also faced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a range hood self-cleaning detection method based on direct current motor driving in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the self-cleaning detection method of the range hood based on the direct current motor drive is characterized by comprising the following steps 1-8:
step 1, selecting N identical range hoods as test range hoods; wherein N is more than or equal to 1;
step 2, respectively obtaining straight-axis current values corresponding to N test range hoods when the test range hoods operate at preset gears to obtain N straight-axis current values; the straight-axis current value corresponding to the extractor hood for the ith test when the extractor hood operates at the preset gear is marked as Id (i), and i is more than or equal to 1 and less than or equal to N;
step 3, respectively carrying out filtering treatment on the obtained N straight-axis current values to obtain N filtered current values, and taking the average value of the N filtered current values as a delivery current value of the range hood for testing; wherein, the filtered current value corresponding to the straight-axis current value Id (I) is marked as ID (I), and the factory current value of the range hood for test is marked as ITesting and leaving factory：
ITesting and leaving factory＝(ID(1)+ID(2)+…+ID(N))/N，1≤i≤N；
Step 4, obtaining a threshold current measured value of the range hood for testing; wherein the threshold current measurement value is labeled IThreshold value；
Step 5, when the range hood same as the range hood for testing leaves the factory, acquiring a straight-axis current value corresponding to the range hood for testing after leaving the factory when the range hood is powered on for the first time and operates at the preset gear, and taking the current value obtained after filtering the straight-axis current value as the leaving-factory current value of the range hood after leaving the factory; wherein the direct current mark corresponding to the factory-leaving range hood is IdAfter leaving factoryThe delivery current value of the range hood after delivery is marked as IDAfter leaving factory；
Step 6, obtaining a self-cleaning reminding current value for the range hood after leaving the factory according to the obtained threshold current measurement value, the factory current value of the range hood for testing and the factory current value of the range hood after leaving the factory; wherein, the self-cleaning reminding current of the factory-leaving range hoodThe value is marked as ICleaning reminder：
ICleaning reminder＝(IThreshold value/ITesting and leaving factory)×IDAfter leaving factory；
Step 7, acquiring a real-time current value of the extractor hood when the extractor hood leaves a factory;
step 8, when the obtained real-time current value is greater than or equal to the self-cleaning reminding current value and the maintaining time of the real-time current value reaches a preset time, judging that a self-cleaning condition occurs, and starting self-cleaning reminding of the range hood; otherwise, go to step 7.
In an improved manner, the range hood self-cleaning detection method based on the direct current motor drive further comprises the following steps: and when the times of the self-cleaning condition reach the preset times, starting the self-cleaning reminding or self-cleaning operation of the range hood.
Further, in the method for detecting self-cleaning of a range hood driven by a direct current motor, the process for obtaining the threshold current measurement value of the range hood for testing includes the following steps a to a 3:
step a1, starting the oil smoke suction work of the range hood for test;
a2, when the oil stain on the test range hood is judged to reach the degree of cleaning, operating the test range hood at the preset gear;
step a3, obtaining a direct axis current value corresponding to the test range hood when the test range hood operates at the preset gear, and taking the current value after the direct axis current value is subjected to filtering processing as a threshold current measurement value of the test range hood.
Preferably, in the range hood self-cleaning detection method based on the direct current motor drive, the preset gear is a first gear.
In a further improvement, in the range hood self-cleaning detection method based on the direct current motor drive, the direct axis current values in the step 3 and the step 5 are processed by a first-order linear filtering algorithm.
Compared with the prior art, the invention has the advantages that:
firstly, the self-cleaning detection method of the range hood driven by the direct current motor considers that the direct current motors configured for each range hood after leaving the factory often have difference problems, the obtained threshold current measurement value and the factory current value of the range hood for testing are processed in a quotient mode, then the obtained quotient value and the factory current value corresponding to the range hood after leaving the factory are processed in a product mode, each obtained self-cleaning reminding current value is automatically adapted to the range hood after leaving the factory which needs to be judged for cleaning, and therefore the problems that the traditional cleaning detection method is ideal and inaccurate in detection due to the fact that the same threshold value (the same operation time threshold value or the same oil stain accumulation threshold value) is ideally set for cleaning conditions of different range hoods are solved. Therefore, the self-cleaning reminding current value obtained by the range hood after leaving the factory is more targeted and personalized, and the problem of inaccuracy caused by self-cleaning reminding detection of the range hood due to different direct current motors is effectively solved;
secondly, the self-cleaning detection method of the range hood does not need to additionally install a sensor for detecting the oil stain amount and continuously supply power to the sensor, so that the energy consumption is effectively reduced, and the cost for detecting the oil stain amount is reduced.
Drawings
Fig. 1 is a schematic flow chart of a self-cleaning detection method of a range hood based on direct current motor driving in the embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Referring to fig. 1, the present embodiment provides a self-cleaning detection method for a range hood based on dc motor driving, where the self-cleaning detection method for a range hood includes the following steps 1 to 8:
step 1, selecting N identical range hoods as test range hoods; wherein N is more than or equal to 1; for example, in this embodiment, 10 identical range hoods are selected, that is, N is 10;
step 2, respectively obtaining straight-axis current values corresponding to N test range hoods when the test range hoods operate at preset gears to obtain N straight-axis current values; the straight-axis current value corresponding to the extractor hood for the ith test when the extractor hood operates at the preset gear is marked as Id (i), and i is more than or equal to 1 and less than or equal to N; in addition, the term "direct axis current" is common knowledge of those skilled in the art and will not be described herein;
specifically, after 10 test range hoods are selected, the obtained straight-axis current values corresponding to the test range hoods are Id (1), Id (2), Id (3), Id (4), Id (5), Id (6), Id (7), Id (8), Id (9) and Id (10), respectively; in this embodiment, the first gear of the range hood is taken as the preset gear;
step 3, respectively carrying out filtering treatment on the obtained N straight-axis current values to obtain N filtered current values, and taking the average value of the N filtered current values as a delivery current value of the range hood for testing; wherein, the filtered current value corresponding to the straight-axis current value Id (I) is marked as ID (I), and the factory current value of the range hood for test is marked as ITesting and leaving factory：
ITesting and leaving factory＝(ID(1)+ID(2)+…+ID(N))/N，1≤i≤N；
That is, the factory current value I of the 10 test range hoods selected in this embodiment is obtained after the processing of the 10 test range hoodsTesting and leaving factoryThat is (ID (1) + ID (2) + … + ID (10))/10;
step 4, obtaining a threshold current measured value of the range hood for testing; wherein the threshold current measurement value is marked as IThreshold value(ii) a For example, in the present embodiment, the threshold current measurement value of the range hood for test is obtained through the following steps a1 to a 3:
step a1, starting the oil smoke suction work of the range hood for test;
a2, when the oil stain on the test range hood is judged to reach the degree of cleaning, operating the test range hood at a preset gear; for example, in step a2, it can be determined by observation whether the oil stain on the range hood to be tested has reached the level required to be cleaned;
step a3, obtaining a direct axis current value corresponding to the test range hood when operating at a preset gear, and taking the current value after filtering the direct axis current value as a threshold current measurement value of the test range hood.
Step 5, when the range hood same as the range hood for testing leaves the factory, acquiring a straight-axis current value corresponding to the range hood which leaves the factory and is electrified for the first time and operates at a preset gear, and taking the current value obtained after filtering the straight-axis current value as the leaving-factory current value of the range hood which leaves the factory; wherein the direct current mark corresponding to the factory-leaving range hood is IdAfter leaving factoryThe delivery current value of the range hood after delivery is marked as IDAfter leaving factory(ii) a It should be noted that, the direct axis current values in the step 5 and the step 3 are both processed by a first-order linear filtering algorithm to obtain corresponding filtered current values;
step 6, obtaining a threshold current measurement value IThreshold valueAnd the delivery current value I of the range hood for testTesting and leaving factoryAnd the delivery current value D of the range hood after deliveryAfter leaving factoryObtaining a self-cleaning reminding current value for the range hood after leaving the factory; wherein, the self-cleaning reminding current value of the factory-leaving range hood is marked as ICleaning reminder：
ICleaning reminder＝(IThreshold value/ITesting and leaving factory)×IDAfter leaving factory；
The factory current value of the range hood after factory delivery is specific to the range hood which has been shipped, for example, the range hood which has been installed in a user kitchen;
in this embodiment, considering that there are often differences in dc motors configured for each range hood after leaving the factory, even if the current input by each dc motor lock is the same, the rotational speeds of the fans driven by the dc motors are also different, and there will be differences in general. Based on the specificity of the DC motor configured for each range hood, the obtained threshold current measurement value and the factory current value of the range hood for testing are processed in a quotient way, then the quotient obtained is multiplied by the delivery current value corresponding to the range hood after delivery, so that each obtained self-cleaning reminding current value is automatically adapted to the factory-leaving range hood needing to be judged for cleaning treatment, thereby avoiding the problems of idealization and inaccurate detection caused by ideally setting the same threshold (the same running time threshold or the same oil stain accumulation threshold) for the cleaning conditions of different range hoods in the traditional method, therefore, the self-cleaning reminding current value obtained by the range hood after leaving the factory is more targeted and personalized, and the problem of inaccuracy caused by self-cleaning reminding detection of the range hood due to different direct current motors is effectively solved. Of course, different range hoods after leaving the factory will have self-cleaning reminding current values which are suitable for judging whether self-cleaning reminding needs to be executed after being started, and the defect that the traditional range hood based on the running time starts the self-cleaning reminding too early or too late due to the light or greasy eating habits of different users is also overcome.
Step 7, acquiring a real-time current value of the extractor hood when the extractor hood leaves a factory during operation; for example, the real-time current value of the range hood after leaving the factory is marked as IAfter leaving the factory, t；t>0；
Step 8, when the obtained real-time current value IAfter leaving the factory, tGreater than or equal to self-cleaning reminding current value ICleaning reminderAnd the real-time current value IAfter leaving the factory, tWhen the maintaining time reaches the preset time, judging that a self-cleaning condition occurs, and starting the self-cleaning prompt of the range hood; otherwise, go to step 7.
Of course, the present embodiment may also set a self-cleaning reminding or self-cleaning operation to start the range hood when the number of times of the self-cleaning condition reaches a preset number of times. For example, once the number of times of the self-cleaning condition is judged to reach 10 times, the self-cleaning reminding action of the range hood is started or the self-cleaning operation is executed according to the requirement.
Claims (4)
1. The self-cleaning detection method of the range hood based on the direct current motor drive is characterized by comprising the following steps 1-8:
step 1, selecting N identical range hoods as test range hoods; wherein N is more than or equal to 1;
step 2, respectively obtaining straight-axis current values corresponding to N test range hoods when the test range hoods operate at preset gears to obtain N straight-axis current values; the straight-axis current value corresponding to the extractor hood for the ith test when the extractor hood operates at the preset gear is marked as Id (i), and i is more than or equal to 1 and less than or equal to N;
step 3, respectively carrying out filtering treatment on the obtained N straight-axis current values to obtain N filtered current values, and taking the average value of the N filtered current values as a delivery current value of the range hood for testing; wherein, the filtered current value corresponding to the straight-axis current value Id (I) is marked as ID (I), and the factory current value of the range hood for test is marked as ITesting and leaving factory：
ITesting and leaving factory＝(ID(1)+ID(2)+…+ID(N))/N，1≤i≤N；
Step 4, obtaining a threshold current measured value of the range hood for testing; wherein the threshold current measurement value is labeled IThreshold value(ii) a The threshold current measurement value is a current value of a straight-axis current value which corresponds to the range hood for test when the range hood for test operates at a preset gear and is subjected to filtering processing; the process for obtaining the threshold current measurement value of the range hood for testing comprises the following steps a to a 3:
step a1, starting the oil smoke suction work of the range hood for test;
a2, when the oil stain on the test range hood is judged to reach the degree of cleaning, operating the test range hood at a preset gear;
a3, acquiring a straight-axis current value corresponding to the test range hood when the test range hood operates at a preset gear, and taking the current value obtained after filtering the straight-axis current value as a threshold current measurement value of the test range hood;
step 5, obtaining the range hood same as the range hood for test after the range hood leaves the factoryThe range hood after leaving the factory is electrified for the first time and corresponds to a straight-axis current value when the range hood runs at the preset gear, and the current value obtained after filtering the straight-axis current value is used as the factory current value of the range hood after leaving the factory; wherein the direct current mark corresponding to the factory-leaving range hood is IdAfter leaving factoryThe delivery current value of the range hood after delivery is marked as IDAfter leaving factory；
Step 6, obtaining a self-cleaning reminding current value for the range hood after leaving the factory according to the obtained threshold current measurement value, the factory current value of the range hood for testing and the factory current value of the range hood after leaving the factory; wherein, the self-cleaning reminding current value of the factory-leaving range hood is marked as ICleaning reminder：
ICleaning reminder＝(IThreshold value/ITesting and leaving factory)×IDAfter leaving factory；
Step 7, acquiring a real-time current value of the extractor hood when the extractor hood leaves a factory;
step 8, when the obtained real-time current value is greater than or equal to the self-cleaning reminding current value and the maintaining time of the real-time current value reaches a preset time, judging that a self-cleaning condition occurs, and starting self-cleaning reminding of the range hood; otherwise, go to step 7.
2. The self-cleaning detection method of the range hood based on the direct current motor driving as claimed in claim 1, further comprising: and when the times of the self-cleaning condition reach the preset times, starting the self-cleaning reminding or self-cleaning operation of the range hood.
3. The self-cleaning detection method for the range hood based on the direct current motor driving as claimed in claim 1 or 2, wherein the preset gear is a first gear.
4. The self-cleaning detection method of the range hood based on the direct current motor driving as claimed in claim 1 or 2, wherein the direct axis current values in the steps 3 and 5 are processed by a first-order linear filtering algorithm.
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| CN108006735A (en) * | 2017-06-07 | 2018-05-08 | 宁波方太厨具有限公司 | A kind of range hood and its impeller use state detection, maintenance reminding method |
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2019
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|---|---|---|---|---|
| EP0094360A1 (en) * | 1982-05-11 | 1983-11-16 | Aktiebolaget Electrolux | Indicator in an air filter |
| CN105509116A (en) * | 2016-01-15 | 2016-04-20 | 广东万家乐燃气具有限公司 | Range hood with oil stain detection function |
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Denomination of invention: A Self Cleaning Detection Method for Range Hood Based on DC Motor Drive Effective date of registration: 20231102 Granted publication date: 20211126 Pledgee: Bank of China Limited Ningbo Hangzhou Bay New Area sub branch Pledgor: NINGBO FOTILE KITCHEN WARE Co.,Ltd. Registration number: Y2023980063518 |
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