CN115540139A - Air purifier and method and device for detecting service life of filter screen of air purifier - Google Patents

Air purifier and method and device for detecting service life of filter screen of air purifier Download PDF

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Publication number
CN115540139A
CN115540139A CN202211166303.1A CN202211166303A CN115540139A CN 115540139 A CN115540139 A CN 115540139A CN 202211166303 A CN202211166303 A CN 202211166303A CN 115540139 A CN115540139 A CN 115540139A
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air purifier
current
pollutant
initial
filter screen
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Chinese (zh)
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陈腾
汪龙海
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Maiborui New Material Technology Chongqing Co ltd
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Maiborui New Material Technology Chongqing Co ltd
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Priority to CN202211166303.1A priority Critical patent/CN115540139A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F24F11/526—Indication arrangements, e.g. displays giving audible indications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/64—Airborne particle content
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention provides an air purifier and a method and a device for detecting the service life of a filter screen of the air purifier, wherein the method for detecting the service life of the filter screen of the air purifier comprises the following steps; acquiring the space volume of the space where the air purifier is located; detecting a plurality of initial pollutant concentrations of the spatial volume in a preset unit time, and detecting a plurality of current pollutant concentrations of the spatial volume in the preset unit time if the operation time of the air purifier reaches a preset time; calculating an initial pollutant CADR value and a current pollutant CADR value; and comparing the initial pollutant CADR value with the current pollutant CADR value to obtain a current ratio, and if the current ratio reaches a set threshold value, giving an alarm by the air purifier, wherein the alarm is used for reminding the filter screen to be replaced. The data that this scheme detected the acquisition mainly are the data in air purifier place space, and the data of gathering in big space are more accurate, calculate it and be used for judging whether need changing of filter screen, also more objective accuracy.

Description

Air purifier and method and device for detecting service life of filter screen of air purifier
Technical Field
The invention relates to the technical field of air purifiers, in particular to an air purifier and a method and a device for detecting the service life of a filter screen of the air purifier.
Background
With the development of society, people can see the shadow of the air purifier on more and more occasions due to the improvement of the life quality. The air purifier can effectively filter, adsorb and decompose various pollutants in the air, improves the air cleanliness and ensures the respiratory health of people. The filter screen is as air purifier's core component, needs to change when air quality reduces, otherwise air purifier's filter effect will worsen or even produce secondary pollution.
The service life of the filter screen is preset by a common manufacturer when the common manufacturer leaves a factory, and the simple calculation mode can not truly reflect the service life of the filter screen through the weighting timing of the operation gear of the air purifier, for example, the air purifier is not started for a long time for use, the filtering performance of the filter screen is always in a decay state, and the weighting timing method can not judge the decay condition when the air purifier is not started. The above methods cannot truly reflect the service life of the filter screen, cannot determine when the filter screen needs to be replaced, and are easily influenced by the precision of the sensor to cause misjudgment.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an air purifier and a method and device for detecting the lifetime of a filter screen thereof, which are used to solve the problem of inaccurate judgment of when the filter screen of the air purifier needs to be replaced in the prior art.
In a first aspect, to achieve the above and other related objects, the present invention provides a method for detecting a lifetime of a filter screen of an air purifier, comprising:
acquiring the space volume of the space where the air purifier is located;
detecting a plurality of initial pollutant concentrations of the space volume in a preset unit time, and detecting a plurality of current pollutant concentrations of the space volume in the preset unit time if the operation time of the air purifier reaches a preset time;
calculating an initial pollutant CADR value according to the space volume, the initial pollutant concentrations and the preset unit time, and calculating a current pollutant CADR value according to the space volume, the current pollutant concentrations and the preset unit time;
and comparing the initial pollutant CADR value with the current pollutant CADR value to obtain a current ratio, and when the current ratio reaches a set threshold value, sending an alarm by the air purifier, wherein the alarm is used for reminding of replacing the filter screen.
Optionally, obtaining a volume of space in which the air purifier is located comprises:
acquiring a plane point cloud picture of a space where the air purifier is located through radar scanning, and converting the area of the space where the air purifier is located through the plane point cloud picture; and detecting the height of the space where the air purifier is located through a distance measuring sensor, and calculating the space volume according to the area and the height.
Optionally, detect in the preset unit interval a plurality of initial pollutant concentrations of space volume, if air purifier's length of operation reaches and predetermines length of time, detect in the preset unit interval a plurality of current pollutant concentrations of space volume, include:
the air purifier is used for the first time and/or after a filter screen is replaced, and a plurality of initial pollutant concentrations of the space volume in the preset unit time are detected and obtained through a pollutant sensor; each of the plurality of initial contaminant concentrations and the plurality of current contaminant concentrations includes a value of an on state and an off state of the air purifier.
Optionally, detect in the preset unit interval a plurality of initial pollutant concentrations of space volume, if air purifier's length of operation reaches and predetermines length of time, detect in the preset unit interval a plurality of current pollutant concentrations of space volume, include:
the contaminants in the initial contaminant concentration and the current contaminant concentration include one or more of particulate matter, TVOC, formaldehyde, toluene, ammonia.
Optionally, detect in the preset unit interval a plurality of initial pollutant concentrations of space volume, if air purifier's length of operation reaches and predetermines length of time, detect in the preset unit interval a plurality of current pollutant concentrations of space volume, include:
pollutants include particulate matter and TVOC in the initial pollutant concentration with in the current pollutant concentration, through particulate matter concentration sensor in predetermine unit interval detect many times and obtain a plurality of initial particulate matter concentrations and a plurality of current particulate matter concentration, through TVOC sensor in predetermine unit interval detect many times and obtain a plurality of initial TVOC concentrations and a plurality of current TVOC concentrations.
Optionally, calculating an initial pollutant CADR value according to the volume of space, the plurality of initial pollutant concentrations, and the preset unit time, and calculating a current pollutant CADR value according to the volume of space, the current pollutant concentrations, and the preset unit time includes:
calculating an initial particulate matter CADR value according to the space volume, the plurality of initial particulate matter concentrations and the preset unit time, and calculating a current particulate matter CADR value according to the space volume, the plurality of current particulate matter concentrations and the preset unit time; calculating an initial TVOC CADR value according to the space volume, the plurality of initial TVOC concentrations and the preset unit time, and calculating a current TVOC CADR value according to the space volume, the plurality of current TVOC concentrations and the preset unit time.
Optionally, compare initial pollutant CADR value and current pollutant CADR value and obtain current ratio, work as current ratio reaches the settlement threshold value, and air purifier sends the warning, the warning is used for reminding to change the filter screen, include:
the method comprises the steps of comparing an initial particulate matter CADR value with a current particulate matter CADR value to obtain a current particulate matter ratio, comparing the initial TVOC CADR value with the current TVOC CADR value to obtain a current TVOC ratio, and when the current particulate matter ratio and/or the current TVOC ratio reach a set threshold value, sending an alarm by the air purifier, wherein the alarm is used for reminding of replacing a filter screen.
Optionally, air purifier sends the warning, the warning is used for reminding the change filter screen, include:
the alarm mode is one or more of sound alarm, text broadcast, light flicker and vibration.
In a second aspect, the invention accordingly provides an air purifier comprising: the method for detecting the service life of the filter screen of the air purifier adopts any one of the methods, the air purifier comprises the filter screen and a machine body, the top of the machine body is provided with a radar and a distance measuring sensor, and the side part of the machine body is provided with a pollutant sensor.
In a third aspect, the present invention also provides an apparatus for detecting a lifetime of a filter screen of an air purifier, including:
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring the space volume of the space where the air purifier is located, detecting a plurality of initial pollutant concentrations of the space volume in a preset unit time, and detecting a plurality of current pollutant concentrations of the space volume in the preset unit time if the operation time of the air purifier reaches a preset time;
a calculation module, configured to calculate an initial pollutant CADR value according to the space volume, the plurality of initial pollutant concentrations, and the preset unit time, and calculate a current pollutant CADR value according to the space volume, the current pollutant concentrations, and the preset unit time;
and the judging module is used for comparing the initial pollutant CADR value with the current pollutant CADR value to obtain a current ratio, when the current ratio reaches a set threshold value, the air purifier gives an alarm, and the alarm is used for reminding of replacing the filter screen.
In the scheme realized by the air purifier and the method and the device for detecting the service life of the filter screen of the air purifier, the initial CADR value of the air purifier and the current CADR value at intervals of a preset time are calculated according to the space volume of the air purifier and the pollutant concentration obtained by multiple detections, whether the service life of the filter screen reaches the replacement standard or not is judged according to the attenuation of the CADR values, and if the service life of the filter screen reaches the replacement standard, an alarm is sent to remind of replacing the filter screen; the data detected and obtained by the method is mainly the data of the space where the air purifier is located, but not the data near the filter screen or on the air purifier, the data collected in the large space is more accurate, and the data is calculated to judge whether the filter screen needs to be replaced, so that the method is more objective and accurate; the service life of the filter screen of the air purifier can be accurately judged, the filter screen can be timely replaced on the premise of not wasting the filter screen, and the air in the space volume can be kept with better quality.
Drawings
Fig. 1 is a schematic structural diagram of an air purifier according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for detecting the lifetime of a filter screen of an air purifier according to an embodiment of the present invention;
FIG. 3 is a block diagram of an apparatus for detecting the lifetime of a filter screen of an air purifier according to an embodiment of the present invention;
fig. 4 is a block diagram of an apparatus for detecting the life of a filter screen of an air purifier according to an embodiment of the present invention.
Description of reference numerals
Air purifier 100, filter screen 110, lidar 120, range sensor 130, particulate matter sensor 140, TVOC sensor 150, control module 160, storage unit 161, processing unit 162.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Other advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure herein, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings and preferred embodiments. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
In the following description, numerous details are set forth to provide a more thorough explanation of embodiments of the present invention, however, it will be apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details, and in other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring embodiments of the present invention.
Firstly, in the technical field of air purifiers, the national standard GB/T18801-2015 air purifier was published in 2015 at 9, 15 days, and the national standard defines four core indexes affecting the purifying effect of the air purifier, namely CADR (clean air volume), CCM (cumulative purification amount), energy efficiency level and noise standard, and the GB/T18801-2015 air purifier is currently in execution.
The CADR Chinese name clean air output ratio is the ratio of clean air output by the air purifier obtained by testing according to strict test standards, the higher the CADR value is, the higher the purification efficiency of the air purifier is, and the numerical value is usually used for representing the purification efficiency of the air purifier.
Fig. 1 is an air purifier 100 according to an exemplary embodiment of the present application, the air purifier 100 including a screen 110 and a body, the body having a radar and ranging sensor 130 disposed at a top thereof and a pollutant TVOC sensor 150 disposed at a side thereof. The radar arranged at the top of the air purifier 100 body is the laser radar 120, the laser radar 120 can be used for surveying and mapping a plane point cloud picture of the space where the air purifier 100 is located, and the area of the space is obtained through collection and conversion of the plane point cloud picture; the distance measuring sensor 130 arranged at the side of the body of the air purifier 100 is an ultrasonic distance measuring sensor 130, and the height of the space is obtained by adding the value measured upwards by the ultrasonic distance measuring sensor 130 to the height of the body; the space is usually a room, and the volume of the space can be calculated by the area and the height in the horizontal direction. It should be noted that the pollutant sensor is referred to as a generic term, and may actually include one or more sensors, such as one or more of the particle sensor 140, the TVOC sensor 150, the formaldehyde sensor, the toluene sensor, and the ammonia sensor; in the present embodiment, the particulate matter sensor 140 and the TVOC sensor 150 are provided in the fuselage.
The term "TVOC" is an English abbreviation for "Total Volatile Organic Compounds", and means a Total Volatile Organic compound. TVOC is an organic substance with saturated vapor pressure of more than 133.32Pa at room temperature, the boiling point of the TVOC is 50-250 ℃, the TVOC exists in the air in an evaporation form at normal temperature, and the TVOC has toxicity, irritation, carcinogenicity and special smell, can affect the skin and mucous membrane and cause acute damage to human body. TVOC mainly comes from combustion products such as coal and natural gas, smoke of smoking, heating, cooking and the like indoors, adhesive, coating, paint, plate material, wallpaper and the like in building and decorative materials, furniture, household appliances, furniture, cleaning agent, emission of human body and the like, and the TVOC has more than thousands of indoor TVOC.
Fig. 2 is a flowchart illustrating a method for detecting a lifetime of a filter screen of an air purifier according to an exemplary embodiment of the present application, which may use the air purifier shown in fig. 1, it should be understood that the method may also use other air purifiers and be specifically performed by other air purifiers in an environment, and the present embodiment is not limited to the implementation environment and the device to which the method is applied.
In an exemplary embodiment, as shown in fig. 2, a method for detecting a lifetime of a filter screen of an air purifier at least includes steps S210 to S240, which are described in detail as follows:
step S210, acquiring the space volume of the space where the air purifier is located;
wherein, the air purifier shown in fig. 1 can be used as the air purifier, and the space can be a room used by the air purifier. In a specific implementation process, scanning and acquiring a plane point cloud picture of a space where an air purifier is located through a laser radar arranged at the top of the air purifier, and converting the area of the space in the horizontal direction through the plane point cloud picture; and detecting the height of the space where the air purifier is located through an ultrasonic ranging sensor arranged at the top of the air purifier, and multiplying the area and the height to obtain the space volume of the space where the air purifier is located.
Step S220, detecting a plurality of initial pollutant concentrations of the space volume in preset unit time, and detecting a plurality of current pollutant concentrations of the space volume in preset unit time if the operation time of the air purifier reaches preset time;
in a specific implementation, the pollutants in the initial pollutant concentration and the current pollutant concentration comprise one or more of common indoor air pollutants such as particulate matters, TVOC, formaldehyde, toluene, ammonia gas and the like; the concentration of the corresponding pollutant is detected through the corresponding pollutant sensor arranged on the air purifier body, and the concentration value of the corresponding pollutant in each time is obtained.
Optionally, the air purifier is used for the first time and/or after a filter screen is replaced, and a plurality of initial pollutant concentrations of the space volume in the preset unit time are obtained through detection of a pollutant sensor;
wherein, the concentration numerical value of pollutant needs to acquire a plurality of concentration numerical values of predetermineeing the unit interval, for example will predetermine the unit interval and set for t minute (min), when air purifier used for the first time, and when using for the first time after changing the filter screen each time, need acquire from initial pollutant concentration c when t =0 0 And recording the contaminant concentration once every preset unit time until the initial contaminant concentration c at t = t t (ii) a Setting the preset time length to be n days, and after the operation time length of the air purifier reaches n days, acquiring the current pollutant concentration c from t =0 0 And is recorded every preset unit timeContaminant concentration up to the then prevailing contaminant concentration c at t = t t 。
In this embodiment, according to the calculation formula provided in GB/T18801-2015 "air purifier", the attenuation constant of the air purifier during use can be calculated, and the change of the pollutants over time conforms to the change trend of the exponential function, and is expressed by the formula:
c t ＝c 0 e -kt
in the formula: c. C t -contaminant concentration at time t = t;
c 0 -contaminant concentration at time t = 0;
k is the decay constant;
t is time;
wherein, c t To c 0 And t is obtained by detecting a pollutant sensor, and is preset unit time.
Optionally, in a specific implementation, the plurality of initial pollutant concentrations and the plurality of current pollutant concentrations each include values of an on state and an off state of the air purifier.
For example, at the time of initial use of the air purifier, and at the time of initial use after each replacement of the filter mesh, in the off state of the air purifier, the initial contaminant concentration c from t =0 is obtained 0 And recording the contaminant concentration once every preset unit time until the initial contaminant concentration c at t = t t And obtaining the concentration c of the pollutant at the time when t =0 needs to be obtained in the off state of the air purifier after the running time of the air purifier reaches n days 0 And recording the concentration of the pollutant once every preset unit time until the current pollutant concentration c when t = t t The partial data is obtained for calculating the natural attenuation constant of the contaminant in a manner that is referenced to the above equation.
Optionally, in a specific implementation process, the pollutants in the initial pollutant concentration and the current pollutant concentration include particulate matter and TVOC, multiple initial particulate matter concentrations and multiple current particulate matter concentrations are obtained through multiple detections by the particulate matter concentration sensor in the preset unit time, and multiple initial TVOC concentrations and multiple current TVOC concentrations are obtained through multiple detections by the TVOC sensor in the preset unit time.
The concentration of particulate matters and TVOC in pollutants is mainly detected, and corresponding numerical values are obtained through calculation and used for calculating the CADR value in the next step.
Step S230, calculating an initial pollutant CADR value according to the space volume, the initial pollutant concentrations and the preset unit time, and calculating a current pollutant CADR value according to the space volume, the current pollutant concentrations and the preset unit time;
wherein, the CADR value calculation method refers to a calculation formula provided by the national standard GB/T18801-2015 of the air purifier.
Q＝60*(Ke-Kn)*V
In the formula: q-is a CADR value;
ke-is the total attenuation constant of the pollutants;
kn-is the natural attenuation constant of the pollutant;
v-is the space volume;
wherein, V is obtained in step S210, ke is obtained by calculating the concentration of the pollutant detected in step S220, and Kn is preset in a program or calculated by detecting the concentration of the pollutant in the closed state of the air purifier in step S220.
Optionally, in a specific embodiment, an initial particulate matter CADR value is calculated according to the space volume, the plurality of initial particulate matter concentrations, and the preset unit time, and a current particulate matter CADR value is calculated according to the space volume, the plurality of current particulate matter concentrations, and the preset unit time; and calculating an initial TVOC CADR value according to the space volume, the plurality of initial TVOC concentrations and the preset unit time, and calculating a current TVOC CADR value according to the space volume, the plurality of current TVOC concentrations and the preset unit time.
In the pollutant in space promptly, specifically utilized particulate matter and TVOC's concentration numerical value, calculated initial particulate matter CADR value, current particulate matter CADR value to and initial TVOC CADR value, current TVOC CADR value for follow-up condition of filter screen judges among the air purifier.
And S240, comparing the initial pollutant CADR value with the current pollutant CADR value to obtain a current ratio, and when the current ratio reaches a set threshold value, giving an alarm by the air purifier, wherein the alarm is used for reminding of replacing the filter screen.
Optionally, in a specific implementation process, the initial particulate matter CADR value is compared with the current particulate matter CADR value to obtain a current particulate matter ratio, the initial TVOC CADR value is compared with the current TVOC CADR value to obtain a current TVOC ratio, and when the current particulate matter ratio and/or the current TVOC ratio reaches a set threshold, the air purifier gives an alarm, and the alarm is used for reminding of replacing the filter screen.
For example, the threshold value of the air cleaner is preset to 50%, and the initial particulate matter CADR value of the air cleaner is determined to be 500m by detection and calculation 3 And h, after the air purifier runs for a preset time, determining the current particulate matter CADR value of the air purifier to be 240m through detection and calculation 3 H is used as the reference value. At the moment, the current ratio obtained by comparing the initial CADR value with the current CADR value is 48 percent and is lower than the set threshold value 50 percent, the filter screen is judged to reach the service life, and the air purifier gives an alarm to remind a user to replace the filter screen.
Optionally, in the implementation process, the alarm mode is one or more of sound alarm, text broadcast, light flashing and vibration. For example, through the display lamp on the air purifier with certain frequency scintillation, "please change the filter screen" of text report through loudspeaker on the air purifier, send certain frequency's alarm sound through loudspeaker on the air purifier, vibrate through certain part on the air purifier, above mode can select one or more and remind to the user in time changes the filter screen.
In some embodiments, a device for detecting a lifetime of a filter screen of an air purifier is provided, where the device corresponds to the method in the foregoing embodiments one to one, as shown in fig. 3, fig. 3 is a schematic structural diagram of a device for detecting a lifetime of a filter screen of an air purifier shown in an exemplary embodiment of the present application, and includes an obtaining module 301, a calculating module 302, and a determining module 303, where each functional module is described in detail as follows:
the acquisition module 301 is configured to acquire a space volume of a space where the air purifier is located, detect a plurality of initial pollutant concentrations of the space volume in a preset unit time, and detect a plurality of current pollutant concentrations of the space volume in the preset unit time if an operation time of the air purifier reaches a preset time;
a calculating module 302, configured to calculate an initial pollutant CADR value according to the space volume, the plurality of initial pollutant concentrations, and the preset unit time, and calculate a current pollutant CADR value according to the space volume, the current pollutant concentrations, and the preset unit time;
and the judging module 303 is used for comparing the initial pollutant CADR value with the current pollutant CADR value to obtain a current ratio, when the current ratio reaches a set threshold value, the air purifier gives an alarm, and the alarm is used for reminding of replacing the filter screen.
Optionally, in a specific implementation process, as shown in fig. 4, fig. 4 is a detailed structural schematic diagram of a device for detecting a service life of a filter screen of an air purifier according to an exemplary embodiment of the present application, where the device includes a laser radar 401, an ultrasonic distance measuring sensor 402, a particulate matter sensor 403, a TVOC sensor 404, a processor 405, a storage unit 406, and an alarm unit 407, and each functional module is described in detail as follows:
the laser radar 401 is used for scanning and acquiring a plane point cloud chart of a space where the air purifier is located, and converting the area of the space in the horizontal direction through the plane point cloud chart;
an ultrasonic distance measuring sensor 402 for detecting the height of the space in which the air purifier is located
A particulate matter sensor 403 for detecting the concentration of particulate matter in the space;
a TVOC sensor 404 for detecting the concentration of TVOC in the space
A processor 405, configured to process various data of operations;
a storage unit 406 for recording and storing data detected and calculated each time;
and an alarm unit 407, configured to start an alarm program.
It should be noted that the device for detecting the lifetime of the filter screen of the air purifier provided in the foregoing embodiment and the method for detecting the lifetime of the filter screen of the air purifier provided in the foregoing embodiment belong to the same concept, wherein the specific manner in which each module and unit perform operations has been described in detail in the method embodiment, and is not described herein again. In practical applications, the road condition apparatus provided in the above embodiment may distribute the above functions by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules to complete all or part of the above described functions, which is not limited herein.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A method for detecting the service life of a filter screen of an air purifier is characterized by comprising the following steps:
acquiring the space volume of the space where the air purifier is located;
detecting a plurality of initial pollutant concentrations of the space volume in a preset unit time, and detecting a plurality of current pollutant concentrations of the space volume in the preset unit time if the operation time of the air purifier reaches a preset time;
calculating an initial pollutant CADR value according to the space volume, the plurality of initial pollutant concentrations and the preset unit time, and calculating a current pollutant CADR value according to the space volume, the current pollutant concentrations and the preset unit time;
and comparing the initial pollutant CADR value with the current pollutant CADR value to obtain a current ratio, and when the current ratio reaches a set threshold value, sending an alarm by the air purifier, wherein the alarm is used for reminding of replacing the filter screen.
2. The method for detecting the service life of the filter screen of the air purifier according to claim 1, wherein the method comprises the following steps: obtain the space volume in air purifier place space, include:
acquiring a plane point cloud picture of a space where the air purifier is located through radar scanning, and converting the area of the space where the air purifier is located through the plane point cloud picture; and detecting the height of the space where the air purifier is located through a distance measuring sensor, and calculating the space volume according to the area and the height.
3. The method for detecting the service life of the filter screen of the air purifier as recited in claim 1, wherein: detect in the preset unit interval a plurality of initial pollutant concentrations of space volume, if air purifier's length of operation reaches and predetermines length of time, detect in the preset unit interval a plurality of current pollutant concentrations of space volume include:
the air purifier is used for the first time and/or after a filter screen is replaced, and a plurality of initial pollutant concentrations of the space volume in the preset unit time are detected and obtained through a pollutant sensor; a plurality of the initial contaminant concentrations and a plurality of the current contaminant concentrations each comprise a numerical value of an on state and an off state of the air purifier.
4. The method for detecting the service life of the filter screen of the air purifier as recited in claim 1, wherein: detect in the preset unit interval a plurality of initial pollutant concentrations of space volume, if air purifier's length of operation reaches and predetermines length of time, detect in the preset unit interval a plurality of current pollutant concentrations of space volume include:
the contaminants in the initial contaminant concentration and the current contaminant concentration include one or more of particulate matter, TVOC, formaldehyde, toluene, ammonia.
5. The method for detecting the service life of the filter screen of the air purifier according to claim 4, wherein the method comprises the following steps: detect in the preset unit interval a plurality of initial pollutant concentrations of space volume, if air purifier's length of operation reaches and predetermines length of time, detect in the preset unit interval a plurality of current pollutant concentrations of space volume include:
pollutants include particulate matter and TVOC in the initial pollutant concentration with in the current pollutant concentration, through particulate matter concentration sensor in predetermine unit interval detect many times and obtain a plurality of initial particulate matter concentrations and a plurality of current particulate matter concentration, through TVOC sensor in predetermine unit interval detect many times and obtain a plurality of initial TVOC concentrations and a plurality of current TVOC concentrations.
6. The method for detecting the service life of the filter screen of the air purifier as recited in claim 5, wherein: calculating an initial pollutant CADR value according to the volume of space, the plurality of initial pollutant concentrations, and the preset unit time, and calculating a current pollutant CADR value according to the volume of space, the current pollutant concentrations, and the preset unit time, including:
calculating an initial particulate matter CADR value according to the space volume, the plurality of initial particulate matter concentrations and the preset unit time, and calculating a current particulate matter CADR value according to the space volume, the plurality of current particulate matter concentrations and the preset unit time; calculating an initial TVOC CADR value according to the space volume, the plurality of initial TVOC concentrations and the preset unit time, and calculating a current TVOC CADR value according to the space volume, the plurality of current TVOC concentrations and the preset unit time.
7. The method for detecting the service life of the filter screen of the air purifier as recited in claim 6, wherein: compare initial pollutant CADR value and current pollutant CADR value and obtain current ratio, work as current ratio reaches the settlement threshold value, and air purifier sends the warning, the warning is used for reminding to change the filter screen, include:
the method comprises the steps of comparing an initial particulate matter CADR value with a current particulate matter CADR value to obtain a current particulate matter ratio, comparing the initial TVOC CADR value with the current TVOC CADR value to obtain a current TVOC ratio, and when the current particulate matter ratio and/or the current TVOC ratio reach a set threshold value, sending an alarm by the air purifier, wherein the alarm is used for reminding of replacing a filter screen.
8. The method for detecting the service life of the filter screen of the air purifier as recited in claim 1, wherein: air purifier sends the warning, the warning is used for reminding to change the filter screen, include:
the alarm mode is one or more of sound alarm, text broadcast, light flicker and vibration.
9. An air purifier, characterized in that, it adopts the method for detecting the service life of the filter screen of the air purifier according to any one of claims 1-8, the air purifier comprises a filter screen and a machine body, the top of the machine body is provided with a radar and a distance measuring sensor, and the side of the machine body is provided with a pollutant sensor.
10. The utility model provides an air purifier filter screen life-span detects's device which characterized in that includes:
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring the space volume of the space where the air purifier is located, detecting a plurality of initial pollutant concentrations of the space volume in a preset unit time, and detecting a plurality of current pollutant concentrations of the space volume in the preset unit time if the operation time of the air purifier reaches a preset time;
a calculation module, configured to calculate an initial pollutant CADR value according to the space volume, the plurality of initial pollutant concentrations, and the preset unit time, and calculate a current pollutant CADR value according to the space volume, the current pollutant concentration, and the preset unit time;
and the judging module is used for comparing the initial pollutant CADR value with the current pollutant CADR value to obtain a current ratio, when the current ratio reaches a set threshold value, the air purifier gives an alarm, and the alarm is used for reminding of replacing the filter screen.
CN202211166303.1A 2022-09-23 2022-09-23 Air purifier and method and device for detecting service life of filter screen of air purifier Pending CN115540139A (en)

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