CN105913752A - Air purifier demonstration and scoring method and device - Google Patents

Air purifier demonstration and scoring method and device Download PDF

Info

Publication number
CN105913752A
CN105913752A CN201610381960.6A CN201610381960A CN105913752A CN 105913752 A CN105913752 A CN 105913752A CN 201610381960 A CN201610381960 A CN 201610381960A CN 105913752 A CN105913752 A CN 105913752A
Authority
CN
China
Prior art keywords
pollutant
demonstration
air purifier
scoring
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610381960.6A
Other languages
Chinese (zh)
Other versions
CN105913752B (en
Inventor
吴忠标
郭国良
周剑峰
吕文韬
单云霞
郭森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Industrial Technology Research Institute of ZJU
Industrial Technology Research Institute of ZJU
Original Assignee
Industrial Technology Research Institute of ZJU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrial Technology Research Institute of ZJU filed Critical Industrial Technology Research Institute of ZJU
Priority to CN201610381960.6A priority Critical patent/CN105913752B/en
Publication of CN105913752A publication Critical patent/CN105913752A/en
Application granted granted Critical
Publication of CN105913752B publication Critical patent/CN105913752B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
    • G09B25/02Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00Subject matter not provided for in other groups of this subclass
    • G01M99/008Subject matter not provided for in other groups of this subclass by doing functionality tests

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses an air purifier demonstration and scoring method and device. The method comprises the following steps of gas distribution, testing, subjective scoring and data comprehensive processing, and finally a comprehensive purifying performance index P value of an air purifier is obtained, wherein P is no less than zero and no more than 1, the smaller the P value is, the poorer the purifying performance is, and the larger the P value is, the higher the purifying performance is. The calculation method of the P value is shown in the specification. The air purifier demonstration and scoring method has the advantages that the demonstration result is relatively comprehensive, and the scoring accuracy is relatively high. The invention further discloses an air purifier demonstration and scoring device.

Description

Air purifier demonstration and methods of marking and device
Technical field
The present invention relates to testing techniques of equipment field, especially relate to a kind of air purifier demonstration and methods of marking.This Invention further relates to a kind of air purifier demonstration and scoring apparatus.
Background technology
The time having more than 80% all one's life of people is spent, along with in interior decoration, automobile in indoor (containing in car) environment Decorations, atmospheric haze etc. constantly affect the indoor air quality of people, and air purifier starts to progress into the room internal ring of people Border, to improve indoor air quality.Wherein, indoor air quality has reacted the concentration of indoor pollutant, and it directly influences people Sensory experience, and be directly connected to the healthy of people.Comprehensive pollution substrate concentration and human body are experienced, ASHRAE Tissue proposes the definition of good indoor air quality: " do not have known pollutant to reach generally acknowledged institute of authoritative institution in air The adverse concentration index determined, and the vast majority of people's (>=80%) being in this air do not has meaning with thumb down to this ". It is pollutant levels and the combination of human body impression that this definition embodies indoor air quality.Dirt in aforementioned air quality Dye substrate concentration relies primarily on specialty detection measuring apparatus, and the sensory experience of air quality is mainly heard by range estimation, nose and determines.
General, people, by the casing of fixed volume, demonstrate sky by the method for range estimation air quality change The clean-up effect of gas purifier.Such as, Authorization Notice No. is the Chinese utility model patent of CN 2458684Y: air purifier Demonstration box, discloses the inverted transparent demonstration box of a kind of opening, and employing smoking device is as polluter, by the method for range estimation The displaying depurator removal effect to particulate matter directly perceived.But, the method is only to the pollutant demonstration effect that can be arrived by visual observation Really, for the air pollutants (such as formaldehyde, toluene, ammonia etc.) that indoor are main, because mostly cannot the most directly being observed and nothing Method obtains demonstrating effect.And pollution concentration is unknown, depurator performance cannot be shown by the method for detection removal efficiency, It is difficult to obtain the most accurately expressing.The most such as, Application No.: 200910084439.6 Chinese invention patent applications: Yi Zhonghuan Border test chamber can open the indoor air pollutants concentration change before and after depurator by the test equipment of specialty by detection, Evaluate the performance of air cleaning.But, the subjectivity that air purifier is brought is improved effect and is difficult to intuitively and accurately be recognized by people Know, and test environment is expensive with equipment price, brings obstacle to the promotion and application of depurator.
In sum, existing demenstration method and device evaluation method are the most single, lack the shortcomings such as detection by quantitative means, lead Cause demonstration result is unilateral and lacks accuracy.
Summary of the invention
It is an object of the invention to provide a kind of air purifier demonstration and methods of marking, it is the most complete that it has demonstration result Face, the feature that scoring accuracy is higher.The invention also discloses a kind of air purifier demonstration and scoring apparatus.
First technical scheme of the present invention is:
Air purifier demonstration and methods of marking,
Said method comprising the steps of: distribution, test, subjective scoring, aggregation of data process, and finally obtain depurator Comprehensive purifying performance index P value;
0≤P≤1, and the least purifying property of P value is the poorest, the biggest purifying property of P value is the strongest;
The computational methods of described P value are:
Wherein:
A represents pollutant levels, the pollutant levels recorded for pollutant sensor or tester;
A represents that pollutant subjective sensation divides, and by the way of seeing, hearing, pollutant is carried out subjectivity for user
A represents that pollutant subjective sensation divides, and by the way of seeing, hearing, pollutant is carried out subjective scoring for user, and Subjective sensation stepping is set as n shelves, and n >=3 grade, and it is 1 point that pollutant 1 grade are then marked, and pollutant n shelves are then marked and divided for n, pollutes Substrate concentration is the highest, marks the highest;Meanwhile, when pollutant are particulate matter or other macroscopic pollutant, eyes are used to see The mode seen is marked, and when pollutant are the pollutant having abnormal flavour, marks by the way of nose is heard;
T represents demonstration and the time evaluated;
I represents demonstration and evaluates the different pollutant used;
FA represents objective evaluation factor, and span is that 0.7-0.9, fa represent subjective assessment factor, and span is 0.1-0.3, and fA+fa=1.0.
The air purifier demonstration of the present invention with the advantage of methods of marking is: demonstration result is more comprehensive, accuracy of marking Higher.The demonstration of this air purifier and methods of marking evaluate the comprehensive purifying energy of depurator by comprehensive purifying performance index P Power, and comprehensive purifying performance index P is made up of subjective purifying property and objective purifying property two parts, subjective purifying property passes through The change of subjective feeling air quality obtains, and objective purifying property is obtained by the means of testing of sensor, thus more comprehensive, Make scoring accuracy higher.
Second technical scheme of the present invention is:
Air purifier demonstration and scoring apparatus,
Described device includes air distribution system, test system, marking system and data handling system;
Wherein:
This air distribution system includes pollutant generator and connects the gas distributor of this pollutant generator;
This test system includes at least 2 demonstration boxs;
This marking system includes pollutant sensor or the tester being positioned in demonstration box, and and demonstration box match Subjective scoring device;
This aggregation of data processing system includes data statistics computing unit and display unit;
And:
This gas distributor has at least 2 gas outlets, and gas outlet connects demonstration box two-by-two by gas passage;
At least one demonstration box does not places depurator, places identical or different depurator in remaining demonstration box;
Demonstration box uses transparent material to make;
Pollutant sensor or tester signal are connected to this aggregation of data processing system;
Subjective scoring device signal is connected to this aggregation of data processing system.
Described pollutant sensor or tester are particulate matter sensors, formaldehyde sensor, benzene homologues sensor, TVOC biography Sensor.
Described demonstration box is provided with the check valve of a smelling the odour.
The air purifier demonstration of the present invention with the advantage of scoring apparatus is: easy to use, data are the most accurate.This air The objective data of depurator demonstration and scoring apparatus is directly processed by aggregation of data processing system, and display comprehensive purifying Performance index P, more convenient.Meanwhile, subjective observation is achieved by comparison, makes scoring tend to objectify, improves data Accuracy.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is air purifier demonstration and the flow chart of methods of marking of embodiments of the invention 1;
Fig. 2 is air purifier demonstration and the connection block diagram of scoring apparatus of embodiments of the invention 2.
In figure:
10, air distribution system, 11, pollutant generator, 12, gas distributor;
20, test system, 21, demonstration box;
30, marking system, 31, pollutant sensor or tester, 32, subjective scoring device;
Detailed description of the invention
Embodiment 1
As shown in Figure 1: air purifier demonstration and methods of marking, comprise the following steps: distribution, test, subjective scoring, number According to integrated treatment, finally obtain the comprehensive purifying performance index P value of depurator.
0≤P≤1, and the least purifying property of P value is the poorest, the biggest purifying property of P value is the strongest;
The computational methods of P value are:
Wherein:
A represents pollutant levels, the pollutant levels recorded for pollutant sensor or tester.
A represents that pollutant subjective sensation divides, and by the way of seeing, hearing, pollutant is carried out subjective scoring for user.Main Perception feels that stepping is set as n shelves, and n >=3 grade, and it is 1 point that pollutant 1 grade are then marked, and pollutant n shelves are then marked and divided for n, pollutant Concentration is the highest, marks the highest.Meanwhile, when pollutant are particulate matter or other macroscopic pollutant, use eyes viewing Mode mark;When pollutant are the pollutant having abnormal flavour, mark by the way of nose is heard.
T represents demonstration and the time evaluated.
I represents demonstration and evaluates the different pollutant used.
FA represents objective evaluation factor, and span is that 0.7-0.9, fa represent subjective assessment factor, and span is 0.1-0.3, and fA+fa=1.0.(the most here illustrating specifically how to carry out the value of fA and fa).
So, Ai is the concentration representing certain specific pollutants, and after Ati represents the unlatching depurator demonstration t time, certain is special Determine the concentration of pollutant.
Embodiment 2
Air purifier demonstration and methods of marking described in embodiment 1 can be demonstrated by air purifier and scoring apparatus It is achieved.
Air purifier demonstration and methods of marking described in embodiment 1 can be demonstrated by air purifier and scoring apparatus It is achieved.
As shown in Figure 2, the demonstration of this air purifier and scoring apparatus include air distribution system 10, test system 20, scoring system System 30 and data handling system 40.
Concretely:
This air distribution system 10 includes pollutant generator 11 and connects the gas distributor 12 of this pollutant generator 11. This pollutant generator 11 is a casing sealed, and is placed with different polluter, and this casing passes through gas in this casing Pipeline is connected with power source, and this power source can be prelum such that it is able to promote its internal gas to discharge.Aforementioned dirt Dye source can be light medicated cigarette, formalin, benzene homologues solution, paint, glue etc. can the material of volatile pollutants voluntarily.
This test system 20 includes at least 2 demonstration boxs 21.Demonstration box 21 uses the transparent materials such as glass to make, in order to Observe.Can be provided with the check valve of a smelling the odour on demonstration box 21, opening check valve can be directly in demonstration box 21 Gas carries out hearing gas operation.
This marking system 30 includes being positioned over the pollutant sensor in demonstration box 21 or tester 31, and and demonstration box The subjective scoring device 32 that 21 match.This pollutant sensor or tester 31 can be particulate matter sensors, formaldehyde sensor, benzene It is thing sensor, TVOC sensor.This subjective scoring device 32 is used for user according to impression to the pollution condition in demonstration box 21 Give a mark.
This aggregation of data processing system 40 includes data statistics computing unit 41 and display unit 42.Obviously, in embodiment 1 The algorithm burning of P value in this data statistics computing unit 41.
More specifically:
This gas distributor 12 has at least 2 gas outlets, and gas outlet connects demonstration box 21 two-by-two by gas passage.
At least one demonstration box 21 does not places depurator using as comparison, place in remaining demonstration box identical or different only Change device.
Pollutant sensor or tester 31 signal are connected to this aggregation of data processing system 40;Subjective scoring device 32 signal It is connected to this aggregation of data processing system 40.That is, the data statistics computing unit 41 of this aggregation of data processing system 40 is according to receipts To data message carry out statistics and computing, final result is shown at display unit 42.
So, pollutant are produced by pollutant generator 11, and are delivered to each uniformly by gas distributor 12 Demonstration box 21.Then detection data are transferred to this data statistics computing unit 41 by pollutant sensor or tester 31, use Pollution condition in demonstration box 21 is marked by person according to subjective observation, and pollutant levels are the highest, marks the highest, then will comment Point result is delivered to this data statistics computing unit 41 by this subjective scoring device 32.The data of this aggregation of data processing system 40 Statistical computation unit 41 carries out statistics and computing according to the data message received, and final result is given by display unit 42 Display.
Owing in each demonstration box, experiment condition and pollutant levels are consistent, and a device includes multiple demonstration box, and wraps Containing a blank sample, test in conjunction with several evaluation methods simultaneously, make testing result the most objective and accurate.
Embodiment 3
Method described in 1 and the device of embodiment 2 in conjunction with the embodiments, concrete work measures as follows.
Take 3 demonstration boxs, be respectively set as No. 1 demonstration box, No. 2 demonstration boxs 2 and No. 3 demonstration boxs.No. 1 demonstration box is as sky White comparison, inside is not placed air purifier, is put into depurator A, put into depurator B in No. 3 demonstration boxs in No. 2 demonstration boxs.Dirty Dye thing sensor uses TVOC sensor and PM2.5 sensor.
In pollutant generator, put into a certain amount of paint solution, will pollutant generator be occurred by small blast fan Pollutant by gas distributor send into 3 demonstration boxs, after stablizing 1 minute, read sensing data, C1 is 0.91mg/m3, C2 is 0.93mg/m3, C3 is 0.91mg/m3.Open demonstration
5 volunteers please hear abnormal flavour in demonstration box by hearing QI KOU respectively, and the registration of pollutant taste is divided into 4 grades, with 1 It is highest level 4 grades that number demonstration box hears the taste that smelly mouth smells, and cleans in gas taste is 1 grade and use subjective scoring outside demonstration box Device is to its appraisal result such as following table.
Objective evaluation factor fA, value is 0.8, and subjective assessment factor fa value is 0.2;
P 0 = Σ 0 i A i - At i A i * f A + Σ 0 i a i - at i a i * f a = ( ( 0.91 - 0.90 ) / 0.91 ) * 0.8 + 0 = 0.008
P A = Σ 0 i A i - At i A i * f A + Σ 0 i a i - at i a i * f a = ( ( 0.91 - 0.32 ) / 0.91 ) * 0.8 + ( ( 3 - 1.2 ) / 3 ) * 0.2 = 0.639
P B = Σ 0 i A i - At i A i * f A + Σ 0 i a i - at i a i * f a = ( ( 0.91 - 0.82 ) / 0.91 ) * 0.8 + ( ( 3 - 2.4 ) / 3 ) * 0.2 = 0.119.
The concentration after can directly reading purification equipment and display device and comprehensive purifying performance is calculated from data statistics As a result, from result can the removal ability that judge depurator of science directly perceived, also can observe depurator A to the purification of paint from Pollutant levels are all better than depurator B to abnormal flavour.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilization Equivalent structure or equivalence flow process that description of the invention and accompanying drawing content are made convert, or it is relevant to be directly or indirectly used in other Technical field, be the most in like manner included in the scope of patent protection of the present invention.

Claims (4)

1. air purifier demonstration and methods of marking, it is characterised in that:
Said method comprising the steps of: distribution, test, subjective scoring, aggregation of data process, and finally obtain the comprehensive of depurator Purifying property indices P value;
0≤P≤1, and the least purifying property of P value is the poorest, the biggest purifying property of P value is the strongest;
The computational methods of described P value are:
Wherein:
A represents pollutant levels, the pollutant levels recorded for pollutant sensor or tester;
A represents that pollutant subjective sensation divides, and for user, pollutant carries out by the way of seeing, hearing subjective scoring, and subjective Sensation stepping is set as n shelves, and n >=3 grade, and it is 1 point that pollutant 1 grade are then marked, and pollutant n shelves are then marked and divided for n, and pollutant are dense Spend the highest, mark the highest;Meanwhile, when pollutant are particulate matter or other macroscopic pollutant, use eyes viewing Mode is marked, and when pollutant are the pollutant having abnormal flavour, marks by the way of nose is heard;
T represents demonstration and the time evaluated;
I represents demonstration and evaluates the different pollutant used;
FA represents objective evaluation factor, and span is that 0.7-0.9, fa represent subjective assessment factor, and span is 0.1- 0.3, and fA+fa=1.0.
2. air purifier demonstration and scoring apparatus, it is characterised in that:
Described device includes air distribution system, test system, marking system and data handling system;
Wherein:
This air distribution system includes pollutant generator and connects the gas distributor of this pollutant generator;
This test system includes at least 2 demonstration boxs;
This marking system includes pollutant sensor or the tester being positioned in demonstration box, and the subjectivity matched with demonstration box Scorer;
This aggregation of data processing system includes data statistics computing unit and display unit;
And:
This gas distributor has at least 2 gas outlets, and gas outlet connects demonstration box two-by-two by gas passage;
At least one demonstration box does not places depurator, places identical or different depurator in remaining demonstration box;
Demonstration box uses transparent material to make;
Pollutant sensor or tester signal are connected to this aggregation of data processing system;
Subjective scoring device signal is connected to this aggregation of data processing system.
3. demonstrate and scoring apparatus according to the described air purifier shown in claim 2, it is characterised in that: described pollutant pass Sensor or tester are particulate matter sensors, formaldehyde sensor, benzene homologues sensor, TVOC sensor.
4. demonstrate and scoring apparatus according to the described air purifier shown in claim 2, it is characterised in that: on described demonstration box It is provided with the check valve of a smelling the odour.
CN201610381960.6A 2016-06-02 2016-06-02 Air purifier demonstration and methods of marking and device Active CN105913752B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610381960.6A CN105913752B (en) 2016-06-02 2016-06-02 Air purifier demonstration and methods of marking and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610381960.6A CN105913752B (en) 2016-06-02 2016-06-02 Air purifier demonstration and methods of marking and device

Publications (2)

Publication Number Publication Date
CN105913752A true CN105913752A (en) 2016-08-31
CN105913752B CN105913752B (en) 2019-03-01

Family

ID=56742974

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610381960.6A Active CN105913752B (en) 2016-06-02 2016-06-02 Air purifier demonstration and methods of marking and device

Country Status (1)

Country Link
CN (1) CN105913752B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106444414A (en) * 2016-11-29 2017-02-22 北京威控科技股份有限公司 Internet purifier based guest room environment protection monitoring network and environment protection integration method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2458684Y (en) * 2001-01-02 2001-11-07 北京亚都科技股份有限公司 Air purifier demonstration box
KR100873410B1 (en) * 2008-07-18 2008-12-11 에이치엔씨 시스템(주) A collection test system for air cleaner
US20130081482A1 (en) * 2011-10-04 2013-04-04 Azbil Corporation Environment providing device and environment evaluating method
CN103091121A (en) * 2013-01-08 2013-05-08 浙江大学苏州工业技术研究院 Air cleaner testing device and testing method thereof
CN204087666U (en) * 2014-07-23 2015-01-07 博朗通医疗科技(北京)有限公司 A kind of purification of air demonstration cabinet
CN206249777U (en) * 2016-06-02 2017-06-13 浙江大学苏州工业技术研究院 Air purifier is demonstrated and scoring apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2458684Y (en) * 2001-01-02 2001-11-07 北京亚都科技股份有限公司 Air purifier demonstration box
KR100873410B1 (en) * 2008-07-18 2008-12-11 에이치엔씨 시스템(주) A collection test system for air cleaner
US20130081482A1 (en) * 2011-10-04 2013-04-04 Azbil Corporation Environment providing device and environment evaluating method
CN103091121A (en) * 2013-01-08 2013-05-08 浙江大学苏州工业技术研究院 Air cleaner testing device and testing method thereof
CN204087666U (en) * 2014-07-23 2015-01-07 博朗通医疗科技(北京)有限公司 A kind of purification of air demonstration cabinet
CN206249777U (en) * 2016-06-02 2017-06-13 浙江大学苏州工业技术研究院 Air purifier is demonstrated and scoring apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈益武: "《通风空调管道安装》", 31 October 2010 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106444414A (en) * 2016-11-29 2017-02-22 北京威控科技股份有限公司 Internet purifier based guest room environment protection monitoring network and environment protection integration method

Also Published As

Publication number Publication date
CN105913752B (en) 2019-03-01

Similar Documents

Publication Publication Date Title
Pal et al. IoT based air pollution monitoring system using Arduino
Fermo et al. Improving indoor air quality through an air purifier able to reduce aerosol particulate matter (PM) and volatile organic compounds (VOCs): Experimental results
Britigan et al. Quantification of ozone levels in indoor environments generated by ionization and ozonolysis air purifiers
Liu et al. Study on the potential relationships between indoor culturable fungi, particle load and children respiratory health in Xi'an, China
CN104456727A (en) Indoor air quality display and purification method and device
May et al. Impact of wildfire smoke events on indoor air quality and evaluation of a low-cost filtration method
WO2008103552A1 (en) Method and apparatus for detecting and removing airborne impurities within an enclosed chamber
CN206249777U (en) Air purifier is demonstrated and scoring apparatus
CN116257540A (en) Management method and management system for geographic environment data
CN105913752A (en) Air purifier demonstration and scoring method and device
Tijani et al. Wireless sensor node for indoor air quality monitoring system
Meier et al. Qualification of air sampler systems: the MAS-100
Herts et al. Cloud service ThingSpeak for monitoring the surface layer of the atmosphere polluted by particulate matters
CN206002511U (en) A kind of new indoor air quality detecting device
Oginawati et al. Analysis of the effect and role of indoor environmental quality in the COVID-19 transmission
Capelli et al. Evaluating the dispersion of toxic odour emissions from complex sources
Maraj et al. Sensing platform development for air quality measurements and analysis
Kamaruddin et al. Exposure to industrial air pollutants and respiratory health school and home exposure among primary school children in Kemaman, Terengganu
CN206348321U (en) A kind of Portable smoke analysis instrument
CN203203931U (en) PH paste for mask
CN214671429U (en) Anion air purification teaching and research device
CN205786445U (en) A kind of Electronic Nose device for food inspection
Rachovski et al. Air pollution monitoring system
CN212283388U (en) Smoke intensity detection equipment
Herath et al. The design and implementation of an IOT-based real-time air purification system for outdoor environment

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant