CN106383080A - Automatic monitor for dust on filter net of air purifier - Google Patents
Automatic monitor for dust on filter net of air purifier Download PDFInfo
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- CN106383080A CN106383080A CN201611003293.4A CN201611003293A CN106383080A CN 106383080 A CN106383080 A CN 106383080A CN 201611003293 A CN201611003293 A CN 201611003293A CN 106383080 A CN106383080 A CN 106383080A
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- 239000000428 dust Substances 0.000 title claims abstract description 57
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000001143 conditioned effect Effects 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 241000238876 Acari Species 0.000 description 1
- 208000006083 Hypokinesia Diseases 0.000 description 1
- 206010039085 Rhinitis allergic Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 201000010105 allergic rhinitis Diseases 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses an automatic monitor for dust on a filter net of an air purifier. The automatic monitor comprises an array type photoelectric sensor, a signal modulating circuit, a multi-channel ADC (Analog-Digital Converter), a processor, a display module, an input module, a sound-light alarm module, a clock module and a power supply module, wherein the input module is used for inputting a dust threshold value to the processor; the clock module is used for inputting a monitoring signal to the processor at a preset time point; the array type photoelectric sensor is arranged on a to-be-detected filter net and is used for outputting a modulated dust strength signal to the processor after processing a dust strength signal of the filter net through the signal modulating circuit and the multi-channel ADC in sequence; the processor is used for judging whether the modulated dust strength signal exceeds the preset dust threshold value or not when the modulated dust strength signal and a monitoring signal are received, driving the sound-light alarm module to alarm if the modulated dust strength signal exceeds the preset dust threshold value, and outputting the modulated dust strength signal to the display module. According to the automatic monitor disclosed by the invention, the dust on the filter net of the air purifier can be automatically monitored.
Description
Technical Field
The invention relates to the technical field of air purifiers, in particular to an automatic dust monitor for a filter screen of an air purifier.
Background
With the continuous change of global climate and the frequent occurrence of various extreme climates, the air purifier has become an essential household appliance in daily life of people. However, a large amount of dust, bacteria and mold can be gathered on the filter screen inside the frequently used air purifier, which is not beneficial to ventilation and influences the heating or cooling effect, and is even more adverse to the health of human body. The Chinese disease control center data show that if the air purifier is seriously polluted, the air purifier can cause sub-health state and various diseases. However, the problem is not paid enough attention to people, and many people do not have the habit of cleaning the filter screen frequently.
With the improvement of living standard of people, people pay more attention to health. At present, air pollution is serious, and indoor air quality is more and more valued by people. The air purifier mainly plays a role in filtering nets, and the filtering nets have certain service life. The filter screen can not only accumulate dirt and dust, but also breed a large amount of bacteria, mould, mites and the like under the action of condensed water due to proper temperature and humidity. When the filter screen is opened, the dust and germs are blown out by the filter screen and enter the human body along with the respiratory tract, so that the human body is dizzy and hypodynamia, suffers from cold and allergic rhinitis, and even induces asthma. The indoor environment and the health division of the national environmental science society are combined with the Shanghai family safety, and the household air purifiers in Shanghai, Beijing, Shenzhen and the like are subjected to indoor investigation, so that 88% of the total bacterial count of the filter screen exceeds the standard, 84% of the total mould count of the filter screen exceeds the standard, and the highest bacteria detected on the filter screen can reach 91259/cm 2. In order to avoid excessive use of the filter screen, it is common practice to count the usage time of the filter screen, and once the usage time exceeds the expected service life, the user will be prompted to replace the filter screen. The method is simple to realize and has obvious defects; because the air quality of the use environment is neglected, in the environment with better air quality, the filter screen can be continuously used when the possible use time reaches a preset value, and the replacement causes waste at the moment; however, in an environment with poor air quality, the filter screen reaches the use limit, but the air purifier still cannot remind people, and the health of people is endangered.
Therefore, pollution of the filter screen becomes one of the main factors harming the family health. However, this problem is not appreciated by people at present. After the air purifier is used for a long time, the air filter net arranged at the position of the air inlet can be stuck with a lot of dust, so that air in the filter net is blocked or unsmooth, and the working effect of the air purifier is influenced. At present, most air purifiers need to take down a filter screen for manual cleaning after being used for a period of time. For users who are not familiar with the structure of the air purifier and who cannot finish manual cleaning of the air purifier, the work becomes a burden when the air purifier is used, or only professional persons can be entrusted to assist operation, or the problem that the filter screen after long-term use has secondary pollution to the air environment is ignored, and the air purifier is continuously used without cleaning. It is known that if the air purifier is used daily and not cleaned regularly, many bacteria and fine dust will stay on the filter net, causing great harm to human body and shortening the life of the machine. The prior art also lacks a device for automatically monitoring dust on a filter screen.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the automatic dust monitor for the filter screen of the air purifier.
The invention adopts the following technical scheme for solving the technical problems:
the automatic dust monitor for the filter screen of the air purifier comprises an array type photoelectric sensor, a signal conditioning circuit, a multi-channel analog-to-digital converter, a processor, a display module, an input module, an acousto-optic alarm module, a clock module and a power module; the device comprises a power module, an input module, a clock module, a signal conditioning circuit, a multi-channel analog-to-digital converter, a processor and an audible and visual alarm module, wherein the power module is used for supplying power, the input module is used for inputting a dust threshold value to the processor, the clock module is used for inputting a monitoring signal to the processor at a preset time point, the array type photoelectric sensor is arranged on a filter screen to be detected, the dust intensity signal on the filter screen is processed by the signal conditioning circuit and the multi-channel analog-to-digital converter in sequence and then outputs a conditioned dust intensity signal to the processor, the processor is used for judging whether the conditioned dust intensity signal exceeds the set dust threshold value or not when the conditioned dust intensity signal and the monitoring signal are received, if the conditioned dust; wherein,
the array type photoelectric sensor comprises N photoelectric sensor chips, the signal conditioning circuit comprises N identical sub-circuits, the input end of each sub-circuit is connected with the output end of one photoelectric sensor chip, and the output end of each sub-circuit is connected with one input end of the multi-channel analog-to-digital converter; each sub-circuit comprises a pre-amplification circuit, a double-operational-amplifier band-pass filter, an intermediate-stage amplification circuit, a second-order low-pass filter and an isolation amplification circuit which are connected in sequence; the power supply module comprises a lithium battery, a control circuit, a charging circuit, a short-circuit protection circuit, a temperature and over-discharge protection circuit, a voltage output circuit and an electric quantity display circuit; the charging circuit is connected with the control circuit and the lithium battery respectively, the lithium battery is connected with the short-circuit protection circuit and the control circuit respectively, the short-circuit protection circuit is connected with the temperature and over-discharge protection circuit, the temperature and over-discharge protection circuit is connected with the voltage output circuit, and the control circuit is connected with the electric quantity display circuit and the temperature and over-discharge protection circuit respectively; n is an integer greater than 0.
As a further optimization scheme of the automatic dust monitor for the filter screen of the air purifier, N is 2.
As a further optimization scheme of the automatic dust monitor for the filter screen of the air purifier, the processor is an MSP430F149 single chip microcomputer of TI company.
As a further optimization scheme of the automatic dust monitor for the filter screen of the air purifier, the model of the photoelectric sensor chip is HOA 2498-003.
As a further optimization scheme of the automatic dust monitor for the filter screen of the air purifier, the multichannel analog-to-digital converter is an AD7195 digital-to-analog converter.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
(1) the dust detection device can automatically detect the dust of the filter screen, and can alarm and monitor when the dust exceeds a dust threshold;
(2) the invention accurately monitors the dust intensity on the filter screen in real time through the array type photoelectric sensor;
(3) the invention utilizes the display module to remind the cleaning, realizes the automatic cleaning reminding and ensures that a user can clean in time; the invention has the characteristics of low power consumption, miniaturization, portability, low cost, high stability and strong practicability.
Detailed Description
The technical scheme of the invention is further explained in detail as follows:
as used herein, the singular forms "a", "an", "the" and "the" may include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
An automatic dust monitor for a filter screen of an air purifier comprises an array type photoelectric sensor, a signal conditioning circuit, a multi-channel analog-to-digital converter, a processor, a display module, an input module, an audible and visual alarm module, a clock module and a power module; the device comprises a power module, an input module, a clock module, a signal conditioning circuit, a multi-channel analog-to-digital converter, a processor and an audible and visual alarm module, wherein the power module is used for supplying power, the input module is used for inputting a dust threshold value to the processor, the clock module is used for inputting a monitoring signal to the processor at a preset time point, the array type photoelectric sensor is arranged on a filter screen to be detected, the dust intensity signal on the filter screen is processed by the signal conditioning circuit and the multi-channel analog-to-digital converter in sequence and then outputs a conditioned dust intensity signal to the processor, the processor is used for judging whether the conditioned dust intensity signal exceeds the set dust threshold value or not when the conditioned dust intensity signal and the monitoring signal are received, if the conditioned dust; wherein,
the array type photoelectric sensor comprises N photoelectric sensor chips, the signal conditioning circuit comprises N identical sub-circuits, the input end of each sub-circuit is connected with the output end of one photoelectric sensor chip, and the output end of each sub-circuit is connected with one input end of the multi-channel analog-to-digital converter; each sub-circuit comprises a pre-amplification circuit, a double-operational-amplifier band-pass filter, an intermediate-stage amplification circuit, a second-order low-pass filter and an isolation amplification circuit which are connected in sequence; the power supply module comprises a lithium battery, a control circuit, a charging circuit, a short-circuit protection circuit, a temperature and over-discharge protection circuit, a voltage output circuit and an electric quantity display circuit; the charging circuit is connected with the control circuit and the lithium battery respectively, the lithium battery is connected with the short-circuit protection circuit and the control circuit respectively, the short-circuit protection circuit is connected with the temperature and over-discharge protection circuit, the temperature and over-discharge protection circuit is connected with the voltage output circuit, and the control circuit is connected with the electric quantity display circuit and the temperature and over-discharge protection circuit respectively; n is an integer greater than 0.
And the N is 2.
The processor is an MSP430F149 single chip microcomputer of TI company.
The model of the photoelectric sensor chip is HOA 2498-003.
The multichannel analog-to-digital converter is an AD7195 digital-to-analog converter.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all should be considered as belonging to the protection scope of the invention.
Claims (5)
1. An automatic dust monitor for a filter screen of an air purifier is characterized by comprising an array type photoelectric sensor, a signal conditioning circuit, a multi-channel analog-to-digital converter, a processor, a display module, an input module, an acousto-optic alarm module, a clock module and a power module; the device comprises a power module, an input module, a clock module, a signal conditioning circuit, a multi-channel analog-to-digital converter, a processor and an audible and visual alarm module, wherein the power module is used for supplying power, the input module is used for inputting a dust threshold value to the processor, the clock module is used for inputting a monitoring signal to the processor at a preset time point, the array type photoelectric sensor is arranged on a filter screen to be detected, the dust intensity signal on the filter screen is processed by the signal conditioning circuit and the multi-channel analog-to-digital converter in sequence and then outputs a conditioned dust intensity signal to the processor, the processor is used for judging whether the conditioned dust intensity signal exceeds the set dust threshold value or not when the conditioned dust intensity signal and the monitoring signal are received, if the conditioned dust; wherein,
the array type photoelectric sensor comprises N photoelectric sensor chips, the signal conditioning circuit comprises N identical sub-circuits, the input end of each sub-circuit is connected with the output end of one photoelectric sensor chip, and the output end of each sub-circuit is connected with one input end of the multi-channel analog-to-digital converter; each sub-circuit comprises a pre-amplification circuit, a double-operational-amplifier band-pass filter, an intermediate-stage amplification circuit, a second-order low-pass filter and an isolation amplification circuit which are connected in sequence; the power supply module comprises a lithium battery, a control circuit, a charging circuit, a short-circuit protection circuit, a temperature and over-discharge protection circuit, a voltage output circuit and an electric quantity display circuit; the charging circuit is connected with the control circuit and the lithium battery respectively, the lithium battery is connected with the short-circuit protection circuit and the control circuit respectively, the short-circuit protection circuit is connected with the temperature and over-discharge protection circuit, the temperature and over-discharge protection circuit is connected with the voltage output circuit, and the control circuit is connected with the electric quantity display circuit and the temperature and over-discharge protection circuit respectively; n is an integer greater than 0.
2. The automatic monitor for dust on filter screen of air purifier as claimed in claim 1, wherein N is 2.
3. The automatic monitor of claim 1, wherein the processor is an MSP430F149 single chip microcomputer from TI corporation.
4. The automatic monitor for dust on filter screen of air purifier as claimed in claim 1, wherein the photoelectric sensor chip is of type HOA 2498-003.
5. The automatic monitor for dust on filter screen of air purifier as claimed in claim 1, wherein the multi-channel analog-to-digital converter is AD7195 digital-to-analog converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003293.4A CN106383080A (en) | 2016-11-15 | 2016-11-15 | Automatic monitor for dust on filter net of air purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003293.4A CN106383080A (en) | 2016-11-15 | 2016-11-15 | Automatic monitor for dust on filter net of air purifier |
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| Publication Number | Publication Date |
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| CN106383080A true CN106383080A (en) | 2017-02-08 |
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| CN201611003293.4A Pending CN106383080A (en) | 2016-11-15 | 2016-11-15 | Automatic monitor for dust on filter net of air purifier |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100017151A1 (en) * | 2008-07-21 | 2010-01-21 | International Business Machines Corporation | Detecting A Fouled Air Filter In A Computer Equipment Enclosure |
| CN203067032U (en) * | 2013-01-24 | 2013-07-17 | 华北科技学院 | Coal mine dust detecting system |
| CN203083905U (en) * | 2013-03-04 | 2013-07-24 | 南京铁道职业技术学院 | Portable PM (particulate matter)-2.5 dust particle detection instrument |
| CN203720586U (en) * | 2014-01-14 | 2014-07-16 | 南京信息工程大学 | Air conditioner cooling fin dust automation monitor based on ARM inner core |
| CN105216692A (en) * | 2015-08-27 | 2016-01-06 | 无锡伊佩克科技有限公司 | A kind of anti-child based on stabilized power source forgets the safety reminding device in car |
| CN105628565A (en) * | 2014-10-31 | 2016-06-01 | 陕西高华知本化工科技有限公司 | Dust detector |
-
2016
- 2016-11-15 CN CN201611003293.4A patent/CN106383080A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100017151A1 (en) * | 2008-07-21 | 2010-01-21 | International Business Machines Corporation | Detecting A Fouled Air Filter In A Computer Equipment Enclosure |
| CN203067032U (en) * | 2013-01-24 | 2013-07-17 | 华北科技学院 | Coal mine dust detecting system |
| CN203083905U (en) * | 2013-03-04 | 2013-07-24 | 南京铁道职业技术学院 | Portable PM (particulate matter)-2.5 dust particle detection instrument |
| CN203720586U (en) * | 2014-01-14 | 2014-07-16 | 南京信息工程大学 | Air conditioner cooling fin dust automation monitor based on ARM inner core |
| CN105628565A (en) * | 2014-10-31 | 2016-06-01 | 陕西高华知本化工科技有限公司 | Dust detector |
| CN105216692A (en) * | 2015-08-27 | 2016-01-06 | 无锡伊佩克科技有限公司 | A kind of anti-child based on stabilized power source forgets the safety reminding device in car |
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Application publication date: 20170208 |
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