CN114487274A - Effectiveness detection method for air purification equipment - Google Patents
Effectiveness detection method for air purification equipment Download PDFInfo
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- CN114487274A CN114487274A CN202111580064.XA CN202111580064A CN114487274A CN 114487274 A CN114487274 A CN 114487274A CN 202111580064 A CN202111580064 A CN 202111580064A CN 114487274 A CN114487274 A CN 114487274A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0039—Specially adapted to detect a particular component for O3
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultra-violet radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
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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
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0047—Specially adapted to detect a particular component for organic compounds
-
- 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
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0662—Comparing before/after passage through filter
Abstract
The invention discloses an effectiveness detection method of air purification equipment, which comprises the following steps: firstly, a starting detection module controls whether the concentration of virus aerosol and the concentration of harmful gas in a detection chamber are safe or not; then, the gas detection module and/or the virus detection module carry out detection operation; and finally, the system closing module ensures the environmental safety of the detection chamber and closes the system. The invention is suitable for the effectiveness detection of air purification equipment and filter materials on various harmful gases and virus aerosols, has no personal injury and environmental pollution in the using process, and is a detection device for effectively treating tail gas.
Description
Technical Field
The invention belongs to the field of air detection, and particularly relates to an effectiveness detection method for air purification equipment.
Background
In recent years, with the improvement of living standard and the importance of life health, the air purification industry is developed vigorously, but the detection of the effectiveness of air purification equipment and filter materials is not paid enough importance correspondingly. Although some research has been conducted on the detection of the effectiveness of air purification equipment and filter materials, there are significant drawbacks.
Chinese patent CN111505212A discloses a formaldehyde remover effect detection device, the scheme is only suitable for the formaldehyde gas removal effect effectiveness detection, and the concentration of formaldehyde specified in the current national standard GB/T18883-2002 indoor air quality Standard is not higher than 0.1mg/m3Resulting in personal injury and environmental pollution during the detection process. Chinese patent CN211461392U discloses an ozone space disinfection detection device, which is only suitable for detecting the effectiveness of the ozone gas removal effect, and the concentration of ozone specified in the current national standard GB/T18202-2000 ozone in indoor air sanitary standard is not higher than 0.1mg/m3Resulting in the pollution of personnel to the sea and the environment during the detection process. Chinese patent CN2648448Y discloses a special detection box structure for SARS virus or pathogen, which is only suitable for detecting SARS virus spread by aerosol, and the tail gas is only treated by a nano-filter, which cannot effectively kill virus in the tail gas, and can cause health injury to operators. Chinese patent CN212357250U discloses a device for detecting the microbial removal performance of an air purifier, but does not effectively treat the tail gas after the detection.
Therefore, the device is suitable for detecting the effectiveness of air purification equipment and filter materials on various harmful gases and virus aerosols, has no personal injury and environmental pollution in the using process, and is a detection device for effectively treating tail gas, which is urgently needed for the development of the air purification industry.
Disclosure of Invention
Aiming at the technical problem, the invention discloses an effectiveness detection method for air purification equipment.
In order to achieve the purpose, the invention adopts the technical scheme that: an effectiveness detection method for air purification equipment comprises the following steps:
firstly, a starting detection module controls whether the concentration of virus aerosol and the concentration of harmful gas in a detection chamber are safe or not;
then, the gas detection module and/or the virus detection module carry out detection operation;
and finally, the system closing module ensures the environmental safety of the detection chamber and closes the system.
Further, the starting detection module checks whether the valves of the system components are all in a closed state; when the valves are all in a closed state, detecting whether the concentration of the virus aerosol and the concentration of harmful gas in the detection chamber are lower than set values;
when the concentration of the virus aerosol is not lower than a first set value, treating by a disinfectant and an ultraviolet sterilizing lamp;
when the concentration of the harmful gas is not lower than a second set value, the harmful gas is treated by a harmful gas removing chamber;
when the concentration of disinfectant is detected to be lower than the third set value, the concentration of disinfectant is increased.
Further, the first set value range is 150-3。
Further, when the harmful gas is detected to be formaldehyde gas with the concentration not less than 0.1mg/m3Treating with air purifying filter material; when the harmful gas is detected to be ozone gas with the concentration not less than 0.1mg/m3And processed by a heater.
Furthermore, the third set value range is 1000-1200mg/L, and the concentration of the disinfectant is increased by an automatic feeder.
Further, the gas detection module comprises a formaldehyde detection module; the formaldehyde detection module opens a formaldehyde generator in the harmful gas manufacturing chamber, and when detecting that the formaldehyde concentration of the harmful gas manufacturing chamber is higher than a fourth set value, the harmful gas manufacturing chamber is communicated with the detection chamber; closing the formaldehyde generator after a period of time, and disconnecting the harmful gas manufacturing chamber and the detection chamber; and then the detection chamber and the formaldehyde removal chamber are communicated, when the formaldehyde concentration of the formaldehyde removal chamber is detected to be lower than a second set value, the detection chamber and the formaldehyde removal chamber are disconnected, and the gas in the formaldehyde removal chamber is discharged.
Further, the gas detection module comprises an ozone detection module; the ozone detection module turns on an ozone generator in the harmful gas production chamber, and when detecting that the concentration of ozone in the harmful gas production chamber is higher than a fourth set value, the harmful gas production chamber is communicated with the detection chamber; after a period of time, the ozone generator is closed and the harmful gas production chamber and the detection chamber are disconnected; then the detection chamber and the ozone removal chamber are communicated, when the ozone concentration of the ozone removal chamber is detected to be lower than a second set value, the detection chamber and the ozone removal chamber are disconnected, and the gas in the ozone removal chamber is discharged.
Further, the virus detection module opens the sprayer of the aerosol production chamber and judges the particle concentration of the virus aerosol production chamber;
when the particle concentration of the virus aerosol manufacturing chamber is more than 1cfu/cm3Opening a valve to communicate the virus aerosol production chamber with the detection chamber;
sampling by an air sample collector in the detection chamber every a first time period;
closing the valve between the nebulizer and the aerosol production chamber and the detection chamber when a second time period is reached;
a gas pipeline for communicating the detection chamber with the disinfectant container and the ultraviolet disinfection chamber;
after the disinfectant container and the ultraviolet disinfection chamber are treated, a valve at the tail end of the tail gas purification system is opened, and treated gas is discharged.
Further, the disinfectant container and the ultraviolet disinfection chamber are sequentially connected through a gas pipeline; an ultraviolet sterilizing lamp is arranged in the ultraviolet sterilizing chamber; and after the gas pipeline of the detection chamber and the tail gas purification system is communicated, the gas pipeline is closed after the third time period of treatment, namely the tail gas purification system is finished.
Further, the valve at the tail end of the exhaust gas purification system is closed after being opened for a fourth period of time. Preferably, the fourth time period is from 10 to 30 minutes.
Furthermore, a concentration detector is arranged in the disinfectant container, and a feeder is arranged outside the disinfectant container.
Further, the system shutdown module checks whether the system component valves are all in a closed state; when the valves are all in a closed state, detecting whether the concentration of virus aerosol particles and the concentration of harmful gas in the detection chamber are lower than a set value or not;
when the concentration of the virus aerosol is not lower than a first set value, treating by a disinfectant and an ultraviolet sterilizing lamp;
when the concentration of the harmful gas is not lower than a second set value, the harmful gas is treated by a harmful gas removing chamber;
and closing a system component valve, an ultraviolet sterilizing lamp and a heater.
Further, an air purification filter material is arranged in the formaldehyde removal chamber, and the air purification filter material is manganese potassium ore dipped with permanganate.
Further, the ultraviolet sterilization lamp adopts an ultraviolet sterilization lamp with the wavelength of 254nm or 222 nm.
Furthermore, the disinfectant container adopts sodium hypochlorite disinfectant.
Further, the virus aerosol sample collected by the air sample collector is diluted by 10 times on a DMEM/F12 culture medium, and then transferred to kidney cells of the monkey for culturing for 20-40 minutes, and then a DMEM/F12 culture medium with 5% fetal calf serum is added into a cell culture dish for further culturing for 5 days, so that the cell culture is completed.
The invention has the following beneficial effects: the method for detecting the effectiveness of the air purification equipment has the advantages of high overall detection efficiency, wide detection range, capability of effectively preventing formaldehyde and the like from polluting the external environment and high safety.
Drawings
Fig. 1 is a schematic diagram of an effectiveness detection system module of an air purification apparatus according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating a start-up detection method of an air purification apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a gas detection module of an effectiveness detection system of an air purification apparatus according to an embodiment of the present invention.
Fig. 4 is a flow chart of formaldehyde detection in the method for detecting effectiveness of air purification equipment according to the embodiment of the present invention.
FIG. 5 is a flow chart of ozone detection in the method for detecting the effectiveness of an air purification apparatus according to an embodiment of the present invention.
Fig. 6 is a virus aerosol detection flowchart of an air purification apparatus effectiveness detection method according to an embodiment of the present invention.
Fig. 7 is a system shutdown flowchart of an air purification apparatus validity detection method according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following embodiments and accompanying drawings.
The method for detecting the effectiveness of the air purification equipment comprises the following steps:
as shown in fig. 1-2, firstly, the detection module is started to control whether the concentration of the virus aerosol and the concentration of the harmful gas in the detection chamber are safe;
then, the gas detection module and/or the virus detection module carry out detection operation;
and finally, the system closing module ensures the environmental safety of the detection chamber and closes the system.
Further, the starting detection module checks whether the valves of the system components are all in a closed state; when the valves are all in a closed state, detecting whether the concentration of the virus aerosol and the concentration of harmful gas in the detection chamber are lower than set values;
when the concentration of the virus aerosol is not lower than the first set value of 200cfu/m3The tenth valve and the eleventh valve are opened to communicate the detection chamber with the disinfectant container and the ultraviolet disinfection chamber, and the detection chamber is treated by a disinfectant in the disinfectant container (the disinfectant adopts sodium hypochlorite disinfectant) and an ultraviolet sterilizing lamp in the ultraviolet disinfection chamber (the ultraviolet sterilizing lamp adopts an ultraviolet sterilizing lamp with the wavelength of 254nm or 222 nm); and closing the tenth valve and the eleventh valve after treatment.
When the concentration of the harmful gas in the detection chamber is not lower than a second set value, namely the concentration of the formaldehyde gas is not lower than 0.1mg/m3Or the ozone gas concentration is not lower than 0.1mg/m3Treating by a harmful gas removal chamber; the formaldehyde is communicated with the detection chamber and the formaldehyde removal chamber by opening the third valve and the sixth valve, and the air purification filter material in the formaldehyde removal chamber is used for treatment (the air purification filter material adopts manganese potassium ore dipped with permanganate); ozone is treated by opening the third valve and the fourth valve to connect the detection chamber and the ozone removal chamber and using a heater in the ozone removal chamber. And closing the corresponding valve after treatment.
When the concentration of the disinfectant is detected to be lower than the third set value by 1000mg/L, the concentration of the disinfectant is increased through an automatic feeder. The system is ready.
As shown in fig. 3, the gas detection module includes a formaldehyde detection module and an ozone detection module. As shown in fig. 4, the formaldehyde detection module: the formaldehyde detection module opens a formaldehyde generator in the harmful gas manufacturing chamber, and when detecting that the formaldehyde concentration of the harmful gas manufacturing chamber is higher than a fourth set value by 10ppm, a first valve and a second valve between the harmful gas manufacturing chamber and the detection chamber are opened; after a period of time (30min), the formaldehyde generator was shut down and the first valve, the second valve were closed. Then a third valve and a sixth valve between the detection chamber and the formaldehyde removal chamber are communicated, and whether the formaldehyde concentration of the formaldehyde removal chamber is lower than a second set value of 0.1mg/m or not is detected after 30min3And closing the third valve and the sixth valve, opening a seventh valve behind the formaldehyde removal chamber, and discharging the gas in the formaldehyde removal chamber.
As shown in fig. 5, the ozone detecting module: the ozone detection module opens an ozone generator in the harmful gas production chamber, and when the ozone concentration of the harmful gas production chamber is detected to be higher than a fourth set value by 10ppm, a first valve and a second valve between the harmful gas production chamber and the detection chamber are opened; after a period of time (30min), the ozone generator is closed and the first valve and the second valve are closed. Then the heater is started and the third valve and the fourth valve between the detection chamber and the ozone removing chamber are communicated, when the ozone concentration in the ozone removing chamber is detected to be lower than the second set value by 0.1mg/m3The third valve and the fourth valve are closed, and the heater is turned off. The fifth valve is then opened to vent the ozone removal chamber.
As shown in fig. 6, the virus detection module turns on the nebulizer of the aerosol-generating chamber and determines the particle concentration of the virus aerosol-generating chamber; filling 10mL of virus DMEM medium suspension by using a 6-hole Collison sprayer, and generating virus aerosol into a detection chamber at the speed of about 15L/min under the condition that the air outlet pressure is 26 psi; the viruses used in the detection process are all from the concentration of 1.47X 107TCID of50Suspension in viral DMEM medium/mL.
When the particle concentration of the virus aerosol manufacturing chamber is more than or equal to 1cfu/cm3When the virus aerosol manufacturing chamber is in a closed state, the eighth valve and the ninth valve are opened, and the virus aerosol manufacturing chamber is communicated with the detection chamber;
sampling by an air sample collector in a detection room every 5min at a first time period;
when the second time period reaches 30min, closing the valves between the atomizer and the aerosol-generating chamber and the detection chamber;
opening a tenth valve to communicate the detection chamber with the disinfectant container and the gas pipeline of the ultraviolet disinfection chamber; and turning on an ultraviolet sterilizing lamp of the ultraviolet sterilizing chamber;
and closing after the treatment is carried out for 30min in the third time period, namely finishing the virus aerosol gas treatment. Meanwhile, a concentration detector in the disinfectant container detects whether the concentration of the disinfectant is more than or equal to 1000mg/L, and if not, a feeder outside the disinfectant container feeds materials.
After the treatment is completed, the eleventh valve at the end of the uv disinfection chamber is opened for a fourth time period of 10min to vent the treated gas and then closed.
The particle concentration was analyzed by a pneumatic particle analyzer, specifically model APS 3321analyzer from TSI, USA, and the collection of the aerosol sample with virus was through an AGI-30 air sample collector. The aerosol sample with virus collected by the air sample collector is diluted by 10 times on DMEM/F12 culture medium, then transferred to kidney cells of monkey (Vero cell) for culture, after about 20 minutes, DMEM/F12 culture medium with 5% fetal calf serum is added into a cell culture dish for further culture (incubation) for 5 days, and then the cell culture condition is observed by a microscope.
As shown in fig. 7, the system shutdown module checks whether the system component valves are all in a closed state; when the valves are all in a closed state, detecting whether the concentration of virus aerosol particles and the concentration of harmful gas in the detection chamber are lower than a set value or not; when the concentration of the virus aerosol is not lower than a first set value or the concentration of the harmful gas is not lower than a second set value, the same method is used for processing. The system is automatically shut down after treatment.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention falls within the protection scope of the present invention.
Claims (10)
1. An effectiveness detection method for air purification equipment is characterized by comprising the following steps:
firstly, a starting detection module controls whether the concentration of virus aerosol and the concentration of harmful gas in a detection chamber are safe or not;
then, the gas detection module and/or the virus detection module carry out detection operation;
and finally, the system closing module ensures the environmental safety of the detection chamber and closes the system.
2. The air purification apparatus effectiveness detection method according to claim 1, characterized in that:
the startup detection module checks whether the system component valves are all in a closed state; when the valves are all in a closed state, detecting whether the concentration of the virus aerosol and the concentration of harmful gas in the detection chamber are lower than set values;
when the concentration of the virus aerosol is not lower than a first set value, treating by a disinfectant and an ultraviolet sterilizing lamp;
when the concentration of the harmful gas is not lower than a second set value, the harmful gas is treated by a harmful gas removing chamber;
when the concentration of disinfectant is detected to be lower than the third set value, the concentration of disinfectant is increased.
3. The air purification apparatus effectiveness detection method according to claim 2, characterized in that:
the first set value range is 150-200cfu/m3(ii) a When the harmful gas is detected to be formaldehyde gas with the concentration not less than 0.1mg/m3Treating with air purifying filter material; when the harmful gas is detected to be ozone gas with the concentration not lower than 0.1mg/m3Treating with a heater; the third set value range is 1000-1200mg/L, and the concentration of the disinfectant is improved by the automatic feeder。
4. The air cleaning apparatus effectiveness detection method according to any one of claims 1 to 3, characterized in that:
the gas detection module comprises a formaldehyde detection module; the formaldehyde detection module opens a formaldehyde generator in the harmful gas manufacturing chamber, and when detecting that the formaldehyde concentration of the harmful gas manufacturing chamber is higher than a fourth set value, the harmful gas manufacturing chamber is communicated with the detection chamber; closing the formaldehyde generator after a period of time, and disconnecting the harmful gas manufacturing chamber and the detection chamber; then the detection chamber and the formaldehyde removal chamber are communicated, an air purification filter material is arranged in the formaldehyde removal chamber, and the air purification filter material adopts manganese potassium ore dipped with permanganate; and when the formaldehyde concentration in the formaldehyde removing chamber is lower than a second set value, disconnecting the detection chamber and the formaldehyde removing chamber, and discharging the gas in the formaldehyde removing chamber.
5. The air cleaning apparatus effectiveness detection method according to any one of claims 1 to 3, characterized in that:
the gas detection module comprises an ozone detection module; the ozone detection module turns on an ozone generator in the harmful gas production chamber, and when detecting that the concentration of ozone in the harmful gas production chamber is higher than a fourth set value, the harmful gas production chamber is communicated with the detection chamber; after a period of time, the ozone generator is closed and the harmful gas production chamber and the detection chamber are disconnected; then the detection chamber and the ozone removal chamber are communicated, when the ozone concentration of the ozone removal chamber is detected to be lower than a second set value, the detection chamber and the ozone removal chamber are disconnected, and the gas in the ozone removal chamber is discharged.
6. The air purification apparatus effectiveness detection method according to claim 1, characterized in that:
the virus detection module opens the sprayer of the aerosol manufacturing chamber and judges the particle concentration of the virus aerosol manufacturing chamber;
when the particle concentration of the virus aerosol manufacturing chamber is more than 1cfu/cm3Opening a valve to communicate the virus aerosol production chamber with the detection chamber;
sampling by an air sample collector in the detection chamber every a first time period;
closing the valve between the nebulizer and the aerosol production chamber and the detection chamber when a second time period is reached;
a gas pipeline for communicating the detection chamber with the disinfectant container and the ultraviolet disinfection chamber;
after the disinfectant container and the ultraviolet disinfection chamber are treated, a valve at the tail end of the tail gas purification system is opened, and treated gas is discharged.
7. The air purification apparatus effectiveness detection method according to claim 6, characterized in that:
the disinfectant container and the ultraviolet disinfection chamber are connected in sequence through a gas pipeline; an ultraviolet sterilizing lamp is arranged in the ultraviolet sterilizing chamber; after the gas pipeline of the detection chamber and the tail gas purification system are communicated, the gas pipeline is closed after the third time period of treatment, namely the tail gas purification system is finished; and opening a valve at the tail end of the tail gas purification system for 10-30 minutes and then closing the valve.
8. The air purification apparatus effectiveness detection method according to claim 6, characterized in that:
diluting the virus aerosol sample collected by the air sample collector by 10 times on a DMEM/F12 culture medium, transferring the virus aerosol sample to kidney cells of the monkey for culturing for 20-40 minutes, adding a DMEM/F12 culture medium with 5% fetal calf serum into a cell culture dish, and continuing to culture for 5 days to complete cell culture.
9. The air purification apparatus effectiveness detection method according to claim 3, characterized in that:
the system closing module checks whether the system component valves are all in a closed state; when the valves are all in a closed state, detecting whether the concentration of virus aerosol particles and the concentration of harmful gas in the detection chamber are lower than a set value or not;
when the concentration of the virus aerosol is not lower than a first set value, treating by a disinfectant and an ultraviolet sterilizing lamp;
when the concentration of the harmful gas is not lower than a second set value, the harmful gas is treated by a harmful gas removing chamber;
and closing a system component valve, an ultraviolet sterilizing lamp and a heater.
10. The air cleaning apparatus effectiveness detection method according to claim 1 or 9, characterized in that:
the ultraviolet sterilization lamp adopts an ultraviolet sterilization lamp with the wavelength of 254nm or 222 nm; the disinfectant container adopts sodium hypochlorite disinfectant.
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2021
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| KR20040032832A (en) * | 2004-03-19 | 2004-04-17 | 코아텍주식회사 | Small/Light air cleaning apparatus using ozone and catalyst material for decomposition of various harmful Gas in the air |
| CN103091464A (en) * | 2013-01-30 | 2013-05-08 | 长安大学 | Testing device for multiple performances of air purification material |
| KR20170072731A (en) * | 2015-12-17 | 2017-06-27 | 재단법인 포항산업과학연구원 | Method and apparatus for air purification with function of formaldehyde removal and sterilization from indoor air |
| CN109064466A (en) * | 2018-08-17 | 2018-12-21 | 北京邮电大学 | A kind of grain depot injurious insect detector cleared up automatically and system |
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| Title |
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