CN116818724A - Method and device for detecting filter screen of air purifier - Google Patents
Method and device for detecting filter screen of air purifier Download PDFInfo
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Abstract
A method and a device for detecting a filter screen of an air purifier are provided, wherein a plurality of ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen; when detecting, firstly, the ultraviolet lamp is turned off, the ultraviolet intensity of the inner side and the outer side of the filter screen is detected, first data A is calculated, then the ultraviolet lamp is turned on, the ultraviolet intensity of the inner side and the outer side of the filter screen is detected, second data B is calculated, and I A-B I is compared with a standard value to judge whether the filter screen needs to be replaced or not. According to the application, the ultraviolet light sensors are arranged at a plurality of point positions on the single side of the filter screen, the detection result is averaged after abnormal values are removed, the influence caused by faults of the single sensor can be eliminated, and meanwhile, the condition that judgment is inaccurate due to different dust contents in each area of the filter screen is reduced. Through the measurement of the ultraviolet intensity difference value, the interference of light intensity attenuation caused by long-term use of the ultraviolet lamp on the detection result can be eliminated, meanwhile, the interference of external light intensity fluctuation on the detection result is eliminated, and the accuracy and the reliability of the detection of the filter screen are improved.
Description
Technical Field
The application relates to the field of air purifiers, in particular to a method and a device for detecting a filter screen of an air purifier.
Background
With the improvement of the social and economic level, people have been increasingly concerned about indoor air quality, and an air purifier is used as a device for improving indoor air quality and has become a necessary household appliance for many families. Air cleaners are often equipped with a filter screen as a consumable component that needs to be replaced when the dust holding capacity reaches a limit.
The detection of the light transmittance of the filter screen is taken as a simple and effective detection method, and the service condition of the filter screen can be intuitively reflected. However, by detecting the intensity of the light transmitted through the filter screen by the internal light source outside the filter screen or detecting the intensity of the light reflected by the filter screen by the internal light source inside the filter screen, the method for detecting the intensity of the light on one side of the filter screen as described above cannot consider the attenuation of the intensity of the light caused by the long-term use of the ultraviolet lamp sterilization module, so that erroneous judgment is easy to occur, and the filter screen is wasted. Meanwhile, the method for detecting the single measuring point of the light intensity of the filter screen cannot consider the influence of uneven dust content of each area on light transmittance and the influence of sensor faults in the use process of the filter screen, so that inaccurate detection of the filter screen is easily caused, the filter screen is wasted due to early replacement, or the performance of the air purifier is reduced due to too late replacement of the filter screen.
Disclosure of Invention
The application mainly aims to overcome the defect that the filter screen detection method in the prior art is easy to misjudge, and provides the filter screen detection method and device for the air purifier, which can improve the accuracy and reliability of filter screen detection.
The application adopts the following technical scheme:
the filter screen detection method of the air purifier is characterized in that a plurality of ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen in advance, and the detection method comprises the following steps:
1) Acquiring and storing an initial state of an ultraviolet lamp of the air purifier;
2) Closing ultraviolet lamps on the inner side of the filter screen, and respectively collecting light intensity data of ultraviolet light sensors on the outer side and the inner side of the filter screen to calculate to obtain first data;
3) Turning on ultraviolet lamps at the inner side of the filter screen, respectively collecting light intensity data of ultraviolet light sensors at the outer side and the inner side of the filter screen, and calculating to obtain second data;
4) Calculating an absolute value C of a difference value between the first data and the second data, comparing the absolute value C with a preset standard value C1, and prompting the filter screen to be replaced if C is more than or equal to C1; if C is less than C1, the filter screen does not need to be replaced;
5) Reading the initial state of the ultraviolet lamp and recovering the ultraviolet lamp.
Preferably, in step 1), the initial state of the external light includes on or off; the ultraviolet light intensity data of the ultraviolet light sensors on the inner side and the outer side of the filter screen are detected and stored.
Preferably, in step 2), the data M1 is obtained by collecting and processing the light intensity data of the ultraviolet light sensor outside the filter screen, the data N1 is obtained by collecting and processing the light intensity data of the ultraviolet light sensor inside the filter screen, and the first data a=m1-N1.
Preferably, in step 2), a plurality of light intensity data of the ultraviolet light sensor outside the filter screen are collected, and the range of the plurality of light intensity data is compared with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data M1;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors outside the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data M1, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data M1.
Preferably, in step 2), a plurality of light intensity data of the ultraviolet light sensor inside the filter screen are collected, and the range of the plurality of light intensity data is compared with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data N1;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors on the inner side of the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data N1, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data N1.
Preferably, in step 3), the data M2 is obtained by collecting and processing the light intensity data of the ultraviolet light sensor outside the filter screen, the data N2 is obtained by collecting and processing the light intensity data of the ultraviolet light sensor inside the filter screen, and the second data b=m2-N2.
Preferably, in step 3), a plurality of light intensity data of the ultraviolet light sensor outside the filter screen are collected, and the range of the plurality of light intensity data is compared with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data M2;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors outside the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data M2, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data M2.
Preferably, in step 3), a plurality of light intensity data of the ultraviolet light sensor inside the filter screen are collected, and the range of the plurality of light intensity data is compared with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data N2;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors on the inner side of the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data N2, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data N2.
Preferably, the preset standard value C1 is determined through testing according to the thickness and the material of the filter screen, the measured preset standard value C1 is subjected to data fitting by Matlab to obtain a fitting curve of the filter screen material and the thickness to the preset standard value C1, and the preset standard value C1 of the selected filter screen is obtained from the fitting relation curve.
A filter screen detection device of an air purifier is characterized in that the filter screen detection method of the air purifier is adopted to judge whether the filter screen needs to be replaced or not, comprising the following steps of
The ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen of the air purifier and are used for collecting light intensity data;
the data processing judging module is used for calculating the acquired light intensity data to obtain first data and second data, comparing an absolute value C of a difference value between the first data and the second data with a preset standard value C1, and prompting the replacement of a filter screen if C is more than or equal to C1; if C is less than C1, the filter screen does not need to be replaced;
the data storage module is used for storing the initial state of the ultraviolet lamp, the first data, the second data and the preset standard value.
As can be seen from the above description of the present application, compared with the prior art, the present application has the following advantages:
1. according to the application, the ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen, when the filter screen is detected, the ultraviolet light is firstly turned off, the light intensity data of the inner side and the outer side of the filter screen are detected, the first data A is calculated, then the ultraviolet light is turned on, the light intensity data of the inner side and the outer side of the filter screen are detected, the second data B is calculated, the absolute value A-B is compared with the standard value, and whether the filter screen needs to be replaced or not is judged, and the detection method is simple and easy to realize.
2. According to the application, the ultraviolet light sensors are arranged at a plurality of point positions on the single side of the filter screen, the detection result is averaged after abnormal values are removed, the influence caused by faults of the single sensor can be eliminated, and meanwhile, the condition that judgment is inaccurate due to different dust contents in each area of the filter screen is reduced.
3. According to the application, through the measurement of the ultraviolet intensity difference, the interference of light intensity attenuation caused by long-term use of the ultraviolet lamp as a sterilization module on the detection result can be eliminated, and meanwhile, the interference of external light intensity fluctuation on the detection result is eliminated, so that the accuracy and reliability of filter screen detection are improved.
Drawings
FIG. 1 is a flow chart of the present application;
fig. 2 is a schematic diagram of selecting a preset standard value.
The application is further described in detail below with reference to the drawings and the specific examples.
Detailed Description
The application is further described below by means of specific embodiments.
In the present application, the terms "first," "second," "third," and the like are used merely to distinguish between similar objects and not necessarily to describe a particular sequence or order, nor are they to be construed as indicating or implying a relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", "front" and "rear", etc. are used for convenience of description of the present application based on the directions or positional relationships shown in the drawings, and are not intended to indicate or imply that the apparatus must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, in the description of the present application, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The application relates to an air purifier which comprises a filtering component, a filter screen, an ultraviolet lamp and the like, wherein the ultraviolet lamp can be arranged on the inner side of the filter screen and is used for ultraviolet sterilization. Based on this, the application provides a method for detecting a filter screen of an air purifier, wherein a plurality of ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen in advance, the plurality of ultraviolet light sensors arranged on the inner side of the filter screen can be used for detecting the light intensity data on the inner side of the filter screen, and the plurality of ultraviolet light sensors arranged on the outer side of the filter screen can be used for detecting the light intensity data on the outer side of the filter screen.
In the application, the ultraviolet light sensor can be a photodiode, a phototriode, a photoresistor or and the like, and the ultraviolet light sensor can be powered by a power module of the air purifier. The specific position of the ultraviolet light sensor on the inner side or the outer side of the filter screen can follow the principle of convenient maintenance and cleaning to maintain the sensitivity and accuracy, the typical position can be detected according to the filter screen determined by experiments, the number can be selected according to practical situations, and the method is not limited herein. According to the application, the plurality of ultraviolet light sensors are arranged at the typical positions of the single side of the filter screen, so that abnormal values caused by faults of the single ultraviolet light sensor can be removed, and meanwhile, the influence of uneven dust content in each area of the filter screen on the overall condition evaluation of the filter screen can be reduced.
Referring to fig. 1, in the detection method of the present application, the difference a is calculated by turning off the ultraviolet lamp inside the filter screen and detecting the intensity of the ultraviolet ray inside and outside the filter screen; then, an ultraviolet lamp on the inner side of the filter screen is turned on, the ultraviolet intensity of the inner side and the outer side of the filter screen is detected, and a difference B is calculated; comparing the I A-B I with a preset standard value to judge whether the filter screen needs to be replaced or not, wherein the method specifically comprises the following steps:
1) The initial state of the ultraviolet lamp of the air purifier is obtained and stored.
In this step, the initial state of the exterior light includes on or off; the ultraviolet light intensity data of the ultraviolet light sensors on the inner side and the outer side of the filter screen are detected and stored.
2) And closing the ultraviolet lamp at the inner side of the filter screen, respectively collecting the light intensity data of the ultraviolet light sensors at the outer side and the inner side of the filter screen, and calculating to obtain first data, wherein the light intensity data is ultraviolet light intensity.
In the step, after the ultraviolet lamp at the inner side of the filter screen is turned off, the light intensity data of the ultraviolet light sensor at the outer side of the filter screen is collected and processed to obtain data M1, the light intensity data of the ultraviolet light sensor at the inner side of the filter screen is collected and processed to obtain data N1, and then the first data A=M1-N1.
Further, for the data M1, the specific calculation method is as follows:
collecting a plurality of light intensity data of an ultraviolet light sensor at the outer side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data M1;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors outside the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data M1, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data M1.
For data N1, the specific calculation method is as follows:
collecting a plurality of light intensity data of an ultraviolet light sensor at the inner side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data N1;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors on the inner side of the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data N1, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data N1.
3) And opening an ultraviolet lamp at the inner side of the filter screen, respectively acquiring light intensity data of ultraviolet light sensors at the outer side and the inner side of the filter screen, and calculating to obtain second data, wherein the light intensity data in the step is also ultraviolet light intensity.
In the step, after the ultraviolet lamp at the inner side of the filter screen is turned on, the light intensity data of the ultraviolet light sensor at the outer side of the filter screen is collected and processed to obtain data M2, the light intensity data of the ultraviolet light sensor at the inner side of the filter screen is collected and processed to obtain data N2, and then the second data B=M2-N2.
Further, for the data M2, the specific calculation method is as follows:
collecting a plurality of light intensity data of an ultraviolet light sensor at the outer side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data M2;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors outside the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data M2, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data M2.
Further, for the data N2, the specific technical manner is as follows:
collecting a plurality of light intensity data of an ultraviolet light sensor at the inner side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data N2;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors on the inner side of the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data N2, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data N2.
In the application, the set value compared with the extremely poor light intensity data can be determined according to the actual test, and the set value is in the range of the difference value caused by uneven dust content of the filter screen at each part, so as to eliminate obvious abnormal values caused by the faults of a single ultraviolet light sensor.
4) Calculating an absolute value C of a difference value between the first data and the second data, comparing the absolute value C with a preset standard value C1, and prompting the filter screen to be replaced if C is more than or equal to C1; if C is less than C1, the filter screen does not need to be replaced.
According to the application, the preset standard value C1 is determined through testing according to the thickness and the material of the filter screen, the C1 value of a plurality of groups of filter screens with different thicknesses and materials when the dust content reaches the replacement standard can be tested in an experimental environment, and the data quantity needs to meet the data fitting condition. And carrying out data fitting on the measured preset standard value C1 by Matlab to obtain a fitting curve of the filter screen material and the thickness to the preset standard value C1, and obtaining the preset standard value C1 of the selected filter screen from the relation curve obtained by fitting, see figure 1.
5) Reading the initial state of the ultraviolet lamp, and recovering the ultraviolet lamp, namely controlling the ultraviolet lamp to return to the initial state.
In the application, the filter screen detection can be automatically started once after the air purifier is operated for a set time period (for example, 24 hours) in an accumulated mode, and if the detection result is that the filter screen is not required to be replaced, the filter screen detection time of the air purifier is reset. Or the screen detection may be manually initiated as desired.
In practical application, can be with the information display who suggests to change the filter screen on air purifier's control panel, still can send the information that suggests to change the filter screen to user terminal.
Based on the above, the application also provides a filter screen detection device of an air purifier, which adopts the filter screen detection method of the air purifier to judge whether the filter screen needs to be replaced, comprising the following steps:
and the ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen of the air purifier and are used for collecting light intensity data, namely ultraviolet light intensity.
The data processing judging module is used for calculating the acquired light intensity data to obtain first data and second data, comparing the absolute value C of the difference value of the first data and the second data with a preset standard value C1, and prompting the replacement of the filter screen if C is more than or equal to C1; if C is less than C1, the filter screen does not need to be replaced.
The data storage module is used for storing the initial state of the ultraviolet lamp, the first data, the second data and a preset standard value.
Furthermore, the application can also comprise a control module which is connected with the data processing judging module, the ultraviolet lamp, the data storage module and the ultraviolet sensor lamp, wherein the control module controls the ultraviolet lamp to be turned on or off, and the interference of light intensity attenuation caused by long-term use of the ultraviolet lamp as a sterilizing module on a detection result is eliminated by making difference between the intensity of ultraviolet rays in and outside a filter screen before and after the ultraviolet lamp is turned on. The application can also comprise a communication module and a control panel, wherein the communication module can also establish connection communication with a user terminal in a digital circuit and wireless communication mode to realize remote monitoring and alarming of the state of the filter screen, and the control panel can be used for displaying information for prompting the replacement of the filter screen.
The foregoing is merely illustrative of specific embodiments of the present application, but the design concept of the present application is not limited thereto, and any insubstantial modification of the present application by using the design concept shall fall within the scope of the present application.
Claims (10)
1. The filter screen detection method of the air purifier is characterized in that a plurality of ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen in advance, and the detection method comprises the following steps:
1) Acquiring and storing an initial state of an ultraviolet lamp of the air purifier;
2) Closing ultraviolet lamps on the inner side of the filter screen, and respectively collecting light intensity data of ultraviolet light sensors on the outer side and the inner side of the filter screen to calculate to obtain first data;
3) Turning on ultraviolet lamps at the inner side of the filter screen, respectively collecting light intensity data of ultraviolet light sensors at the outer side and the inner side of the filter screen, and calculating to obtain second data;
4) Calculating an absolute value C of a difference value between the first data and the second data, comparing the absolute value C with a preset standard value C1, and prompting the filter screen to be replaced if C is more than or equal to C1; if C is less than C1, the filter screen does not need to be replaced;
5) Reading the initial state of the ultraviolet lamp and recovering the ultraviolet lamp.
2. The method for detecting a filter screen of an air purifier as recited in claim 1, wherein: in step 1), the initial state of the external light comprises on or off; the ultraviolet light intensity data of the ultraviolet light sensors on the inner side and the outer side of the filter screen are detected and stored.
3. The method for detecting a filter screen of an air purifier as recited in claim 1, wherein: in the step 2), the data M1 is obtained by collecting and processing the light intensity data of the ultraviolet light sensor outside the filter screen, the data N1 is obtained by collecting and processing the light intensity data of the ultraviolet light sensor inside the filter screen, and the first data a=m1-N1.
4. A method of detecting a filter screen of an air cleaner as recited in claim 3, wherein: step 2) collecting a plurality of light intensity data of an ultraviolet light sensor at the outer side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data M1;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors outside the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data M1, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data M1.
5. A method of detecting a filter screen of an air cleaner as recited in claim 3, wherein: step 2) collecting a plurality of light intensity data of an ultraviolet light sensor on the inner side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data N1;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors on the inner side of the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data N1, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data N1.
6. The method for detecting a filter screen of an air purifier as recited in claim 1, wherein: in the step 3), the light intensity data of the ultraviolet light sensor at the outer side of the filter screen is collected and processed to obtain data M2, the light intensity data of the ultraviolet light sensor at the inner side of the filter screen is collected and processed to obtain data N2, and the second data b=m2-N2.
7. The method for detecting a filter screen of an air purifier as recited in claim 6, wherein: step 3) collecting a plurality of light intensity data of an ultraviolet light sensor at the outer side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data M2;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors outside the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data M2, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data M2.
8. The method for detecting a filter screen of an air purifier as recited in claim 6, wherein: step 3) collecting a plurality of light intensity data of an ultraviolet light sensor on the inner side of the filter screen, and comparing the range of the plurality of light intensity data with a set value:
if the range is smaller than or equal to the set value, taking the average value of the light intensity data to obtain data N2;
if the range is greater than the set value, firstly calculating an average value of the light intensity data of all the ultraviolet light sensors on the inner side of the filter screen, calculating the absolute value of the difference value between the light intensity data of each ultraviolet light sensor and the average value, and eliminating one light intensity data with the maximum absolute value; and solving the total range of the rest light intensity data, if the total range is smaller than or equal to a set value, calculating the average value of the light intensity data to obtain data N2, and if the total range is larger than the set value, repeating the step of eliminating the abnormal value until the total range is smaller than the set value, and calculating the average value to obtain data N2.
9. The method for detecting a filter screen of an air purifier as recited in claim 1, wherein: the preset standard value C1 is determined through testing according to the thickness and the material of the filter screen, the measured preset standard value C1 is subjected to data fitting by Matlab, a fitting curve of the filter screen material and the thickness to the preset standard value C1 is obtained, and the preset standard value C1 of the selected filter screen is obtained from the relation curve obtained through fitting.
10. A screen detecting apparatus of an air cleaner, wherein the screen detecting method of an air cleaner according to any one of claims 1 to 9 is used to determine whether replacement of a screen is required, comprising
The ultraviolet light sensors are respectively arranged on the inner side and the outer side of the filter screen of the air purifier and are used for collecting light intensity data;
the data processing judging module is used for calculating the acquired light intensity data to obtain first data and second data, comparing an absolute value C of a difference value between the first data and the second data with a preset standard value C1, and prompting the replacement of a filter screen if C is more than or equal to C1; if C is less than C1, the filter screen does not need to be replaced;
the data storage module is used for storing the initial state of the ultraviolet lamp, the first data, the second data and the preset standard value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118067665A (en) * | 2024-04-19 | 2024-05-24 | 山东骏田农业装备有限公司 | Smoke discharge detection system for tractor smoke intensity experiment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118067665A (en) * | 2024-04-19 | 2024-05-24 | 山东骏田农业装备有限公司 | Smoke discharge detection system for tractor smoke intensity experiment |
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