CN106731784B - Device for purifying formaldehyde in indoor air and formaldehyde removing method thereof - Google Patents
Device for purifying formaldehyde in indoor air and formaldehyde removing method thereof Download PDFInfo
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- CN106731784B CN106731784B CN201610909076.5A CN201610909076A CN106731784B CN 106731784 B CN106731784 B CN 106731784B CN 201610909076 A CN201610909076 A CN 201610909076A CN 106731784 B CN106731784 B CN 106731784B
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- formaldehyde
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- storage barrel
- indoor air
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 239000007921 spray Substances 0.000 claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims abstract description 5
- 239000011941 photocatalyst Substances 0.000 claims description 27
- 150000008625 2-imidazolidinones Chemical class 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 239000013530 defoamer Substances 0.000 claims description 5
- 150000002191 fatty alcohols Chemical class 0.000 claims description 5
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 5
- 235000020737 peppermint extract Nutrition 0.000 claims description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002274 desiccant Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 12
- 238000004887 air purification Methods 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 description 8
- 238000006731 degradation reaction Methods 0.000 description 8
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000005034 decoration Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- IMBKASBLAKCLEM-UHFFFAOYSA-L ferrous ammonium sulfate (anhydrous) Chemical compound [NH4+].[NH4+].[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O IMBKASBLAKCLEM-UHFFFAOYSA-L 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention relates to the technical field of air purification, in particular to a device for purifying formaldehyde in indoor air and a formaldehyde removing method thereof. The device for purifying formaldehyde in indoor air comprises a box body, wherein a liquid storage barrel is fixed at the bottom end inside the box body, an air inlet pipe and an emptying pipe are arranged at the bottom of the liquid storage barrel, and the air inlet pipe is connected with an air inlet pump; a gas scattering sheet I and a gas scattering sheet II are fixed in the liquid storage barrel at the upper end of the air inlet pipe, and a circulating pipe is arranged at the upper end of the gas scattering sheet II; the circulating pipe is connected with a circulating pump fixed on the inner wall of the liquid storage barrel, and n spray heads are arranged at the top end of the circulating pipe; the outer part of the liquid storage barrel is provided with a plurality of ultraviolet lamps which are fixed on the inner wall of the box body; the upper part of the liquid storage barrel is provided with a liquid inlet pipe; the top of the box body is provided with an air outlet pipe, and the tail end of the air outlet pipe is provided with a filter box. The invention can circularly purify and absorb formaldehyde in indoor air, has good formaldehyde absorption effect, does not generate smell, does not influence life, is suitable for indoor use, and has simple operation and convenient use.
Description
Field of the art
The invention relates to the technical field of air purification, in particular to a device for purifying formaldehyde in indoor air and a formaldehyde removing method thereof.
(II) background art
At present, along with the continuous progress of society, the requirements of people on indoor decoration are higher and higher, and in the indoor decoration process, formaldehyde generated by decoration is very harmful to human bodies, so that indoor ventilation can be guaranteed as much as possible after common decoration to remove residual formaldehyde, and the purpose of removing formaldehyde is achieved by a bamboo charcoal bag or a spray, however, the method has poor formaldehyde removing effect, has a small application range and cannot be used repeatedly.
(III) summary of the invention
The invention provides a device for purifying formaldehyde in indoor air and a formaldehyde removing method thereof in order to make up for the defects of the prior art.
The invention is realized by the following technical scheme:
the utility model provides a device of formaldehyde in air in purifying room, includes sealed box body from top to bottom, its characterized in that: a liquid storage barrel is fixed at the bottom end inside the box body, an air inlet pipe and an emptying pipe are arranged at the bottom of the liquid storage barrel, and the air inlet pipe is connected with an air inlet pump; a gas scattering sheet I and a gas scattering sheet II are fixed in the liquid storage barrel at the upper end of the air inlet pipe; the upper end of the gas scattering sheet II is provided with a circulating pipe; the circulating pipe is connected with a circulating pump fixed on the inner wall of the liquid storage barrel, and n spray heads are arranged at the top end of the circulating pipe; the outer part of the liquid storage barrel is provided with a plurality of ultraviolet lamps which are fixed on the inner wall of the box body; the upper part of the liquid storage barrel is provided with a liquid inlet pipe; the top of the box body is provided with an air outlet pipe, and the tail end of the air outlet pipe is provided with a filter box.
An air inlet check valve is arranged on the air inlet pipe; an evacuation valve is arranged on the evacuation pipe.
The gas scattering sheet I and the gas scattering sheet II are provided with uniform scattering holes.
The top area of the liquid storage barrel is larger than the bottom area.
The tail end of the air outlet pipe is inclined upwards.
And a drying agent is arranged in the filter box.
The formaldehyde removing method of the device for purifying formaldehyde in indoor air comprises the following steps:
(1) Preparing an optical touch medium liquid: the weight portion of the components is as follows: 0.1 to 0.3 part of anatase type nano titanium dioxide, 0.5 to 1.5 parts of triethanolamine, 0.02 to 0.08 part of fatty alcohol polyoxyethylene ether, 0.5 to 1.5 parts of 2-imidazolidinone derivative, 0.02 to 0.08 part of organic silicon defoamer and 0.05 to 0.15 part of peppermint extract; adding water into the components to fix the volume to 1000ml;
(2) Introducing air into the bottom of the liquid storage barrel, and controlling the flow rate of the air to be 10-20m 3 /h；
(3) The photocatalyst liquid is circularly sprayed through a circulating pump and a spray header, air is subjected to first catalytic purification in the photocatalyst liquid after passing through the gas scattering sheets I and II, and is subjected to second catalytic purification in the air chamber after passing through the sprayed photocatalyst liquid;
(4) Filtering and discharging the purified air by water absorption, and repeating the steps (2) - (3) for 24-48h.
Further, the composition comprises the following components in parts by weight: 0.2 part of anatase nano titanium dioxide, 1.0 part of triethanolamine, 0.05 part of fatty alcohol polyoxyethylene ether, 1.0 part of 2-imidazolidinone derivative, 0.05 part of organosilicon defoamer and 0.1 part of peppermint extract.
In the step (1), the temperature of the photocatalyst liquid is controlled to be 20-40 ℃.
When the ultraviolet light type liquid storage device is used, indoor air is led into the liquid storage barrel through the air inlet pump, the air is divided through the air scattering sheets, and photocatalyst solution is filled in the liquid storage barrel and is excited through the ultraviolet lamp arranged outside the liquid storage barrel; the air is subjected to primary formaldehyde removal in the liquid storage barrel from bottom to top, then the air is subjected to secondary formaldehyde removal through the action of the circulating pump and the spray header, and the purified air returns to the room again.
The beneficial effects of the invention are as follows: the invention can circularly purify and absorb formaldehyde in indoor air, has good formaldehyde absorption effect, does not generate smell, does not influence life, is suitable for indoor use, and has simple operation and convenient use.
(IV) description of the drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a graph showing the time removal efficiency of the photocatalyst according to the present invention;
FIG. 3 is a graph showing the removal efficiency of the photocatalyst temperature according to the present invention.
In the figure, a box body 1, a liquid storage barrel 2, an air inlet pipe 3, an air inlet pump 4, a gas scattering sheet I5, an emptying pipe 6, a circulating pipe 7, a circulating pump 8, a spray header 9, an ultraviolet lamp 10, a liquid inlet pipe 11, an air outlet pipe 12, a filter box 13 and a gas scattering sheet II 14.
(fifth) detailed description of the invention
Example 1
The drawings illustrate one embodiment of the invention. The embodiment comprises a box body 1 which is sealed up and down, wherein a liquid storage barrel 2 is fixed at the bottom end inside the box body 1, an air inlet pipe 3 and an emptying pipe 6 are arranged at the bottom of the liquid storage barrel 2, and the air inlet pipe 3 is connected with an air inlet pump 4; a gas scattering sheet I5 is fixed in the liquid storage barrel 2 at the upper end of the air inlet pipe 3; the lower end of the gas scattering sheet 5 is provided with a circulating pipe 7; the circulating pipe 7 is connected with a circulating pump 8 fixed on the inner wall of the liquid storage barrel 2, n spray heads 9 are arranged at the top end of the circulating pipe 8, and n is more than or equal to 1; the liquid storage barrel 2 is externally provided with a plurality of annular ultraviolet lamps 10 which are fixed on the inner wall of the box body 1; the upper part of the liquid storage barrel 2 is provided with a liquid inlet pipe 11; the top of the box body 1 is provided with an air outlet pipe 12, and the tail end of the air outlet pipe 12 is provided with a filter box 13. An air inlet check valve is arranged on the air inlet pipe 3, and when air inlet is stopped, the backflow of the treatment fluid is prevented; an evacuation valve is arranged on the evacuation pipe 6. And the gas scattering sheet I5 and the gas scattering sheet II 14 are provided with uniform scattering holes. The top end area of the liquid storage barrel 2 is larger than the bottom area. The tail end of the air outlet pipe 12 is inclined upwards. A desiccant is arranged in the filter box 13.
When the formaldehyde-containing indoor air conditioner is used, indoor air containing formaldehyde is led into the liquid storage barrel 2 through the air inlet pump 4, the air is divided through the air scattering sheet I5 and the air scattering sheet II 14, photocatalyst solution is filled in the liquid storage barrel 2, the photocatalyst solution is circularly sprayed through the circulating pump, photochemical reaction is excited through the ultraviolet lamp 10 arranged outside the liquid storage barrel 2, and formaldehyde in the air is removed through oxidation; the air is oxidized for the first time in the photocatalyst liquid environment in the liquid storage barrel 2 from bottom to top, formaldehyde is removed by the second time of oxidizing the formaldehyde-containing air in the gaseous environment through the action of the circulating pump 8 and the spray header 9, and the purified air returns to the room through the exhaust pipe 12.
Example 2
(1) The photocatalyst comprises the following components in proportion: 0.2g of anatase nano titanium dioxide, 1.0g of triethanolamine, 0.05g of fatty alcohol polyoxyethylene ether, 1.0g of 2-imidazolidinone derivative, 0.05g of organosilicon defoamer, 0.1g of peppermint extract, 1000ml of photocatalyst is prepared;
(2) Measuring quantitative absorption liquid, adding quantitative formaldehyde solution, shaking, dripping into ferrous ammonium sulfate solution as color developing agent to develop color, and spectrophotometrically measuring formaldehyde content of 0.5mg/m 3 Formaldehyde test reagent of (a).
(3) Selecting 2 groups of samples, setting three repetitions in each group of samples, dripping 4ml of formaldehyde test reagent into a test tube at the temperature of 28 ℃, then respectively dripping 0.5ml of photocatalyst and 1.0ml of photocatalyst, measuring along with time change, selecting four detection time points of 20min, 60min, 6h and 24h for formaldehyde content detection, and measuring the influence of different groups of time on the treatment effect.
The analysis of the time-dependent photocatalyst effect data is shown in Table 1
Table 1 removal efficiency test samples
As shown in the experimental data analysis of FIG. 1, the treatment effect of the high-efficiency photocatalyst is 42% when the dosage of the high-efficiency photocatalyst is 0.5ml/4.0ml of formaldehyde test reagent for 20 min; the reaction speed is suddenly changed from 20min to 60min, the speed is rapidly increased, and the post-treatment efficiency reaches 98% after 24 h; the treatment effect of the formaldehyde test reagent with the dosage of 1.0ml/4.0ml for 20min is 92%, the reaction is rapid and efficient, the treatment efficiency is 98% after 24 hours of reaction is more stable for 24 hours, and the effect is obvious and rapid.
(4) 3 groups of samples are selected, three repeats are arranged in each group of samples, the initial formaldehyde content is 0.5mg/m < 3 >, actual weather conditions are considered, three working conditions of low temperature 10 ℃, medium temperature 28 ℃ and high temperature 45 ℃ are adopted to test the removal efficiency of the photocatalyst, and the influence of the temperature on formaldehyde degradation is examined.
The analysis of the temperature versus photocatalyst effect data is shown in FIG. 2;
the effect of temperature on the photocatalyst can be seen from FIG. 2: the degradation rate of the formaldehyde after the photocatalyst is degraded at three temperatures is 65%, 70% and 75% respectively in 1h, the degradation rate of the formaldehyde after the formaldehyde is degraded at three temperatures is 75%, 78% and 77% respectively in 4-10h, the degradation rate of the formaldehyde is in a rapid increase mode, and the actual degradation rate of the formaldehyde after the formaldehyde is 10h is 94%, 96% and 96% respectively. From the above, the difference of temperature has a certain influence on the degradation of formaldehyde by the photocatalyst spray, the high temperature has a slightly better degradation effect relative to the low temperature, and the photocatalyst spray has the best degradation effect on formaldehyde at 28 ℃.
The present invention has been described above by way of example, but the present invention is not limited to the above-described embodiments, and any modifications or variations based on the present invention fall within the scope of the present invention.
Claims (8)
1. The method for removing formaldehyde in the indoor air is characterized in that a device for removing formaldehyde in the indoor air is adopted, the device for removing formaldehyde in the indoor air comprises a box body which is sealed up and down, a liquid storage barrel is fixed at the bottom end of the box body, an air inlet pipe and an air exhaust pipe are arranged at the bottom of the liquid storage barrel, and the air inlet pipe is connected with an air inlet pump; a gas scattering sheet I and a gas scattering sheet II are fixed in the liquid storage barrel at the upper end of the air inlet pipe; the upper end of the gas scattering sheet II is provided with a circulating pipe; the circulating pipe is connected with a circulating pump fixed on the inner wall of the liquid storage barrel, and n spray heads are arranged at the top end of the circulating pipe; the outer part of the liquid storage barrel is provided with a plurality of ultraviolet lamps which are fixed on the inner wall of the box body; the upper part of the liquid storage barrel is provided with a liquid inlet pipe; an air outlet pipe is arranged at the top end of the box body, a filter box is arranged at the tail end of the air outlet pipe,
the formaldehyde removal method comprises the following steps: (1) preparing an optical touch medium: the weight portion of the components is as follows: 0.1 to 0.3 part of anatase type nano titanium dioxide, 0.5 to 1.5 parts of triethanolamine, 0.02 to 0.08 part of fatty alcohol polyoxyethylene ether, 0.5 to 1.5 parts of 2-imidazolidinone derivative, 0.02 to 0.08 part of organic silicon defoamer and 0.05 to 0.15 part of peppermint extract; adding water into the components to fix the volume to 1000ml; (2) Introducing air into the bottom of the liquid storage barrel, and controlling the flow rate of the air to be 10-20m 3 /h; (3) The photocatalyst liquid is circularly sprayed through a circulating pump and a spray header, air is fully contacted with the photocatalyst liquid for primary purification after passing through a gas scattering sheet I and a gas scattering sheet II, and secondary purification is carried out after passing through the sprayed photocatalyst liquid; (4) Filtering and discharging the purified air by water absorption, and repeating the steps (2) - (3) for 24-48h.
2. The method for removing formaldehyde from indoor air according to claim 1, wherein: an air inlet check valve is arranged on the air inlet pipe in the device for purifying formaldehyde in indoor air; an evacuation valve is arranged on the evacuation pipe.
3. The method for removing formaldehyde from indoor air according to claim 1, wherein: in the device for purifying formaldehyde in indoor air, the gas scattering sheet I and the gas scattering sheet II are provided with uniform scattering holes.
4. The method for removing formaldehyde from indoor air according to claim 1, wherein: the area of the top end of the liquid storage barrel in the device for purifying formaldehyde in indoor air is larger than the area of the bottom.
5. The method for removing formaldehyde from indoor air according to claim 1, wherein: the tail end of the air outlet pipe in the device for purifying formaldehyde in indoor air is inclined upwards.
6. The method for removing formaldehyde from indoor air according to claim 1, wherein: and a drying agent is arranged in the filter box in the device for purifying formaldehyde in indoor air.
7. The method for removing formaldehyde from an apparatus for purifying formaldehyde in indoor air according to claim 1, characterized in that: in the step (1), the following components in parts by weight are mixed: 0.2 part of anatase nano titanium dioxide, 1.0 part of triethanolamine, 0.05 part of fatty alcohol polyoxyethylene ether, 1.0 part of 2-imidazolidinone derivative, 0.05 part of organosilicon defoamer and 0.1 part of peppermint extract.
8. The method for removing formaldehyde from an apparatus for purifying formaldehyde in indoor air according to claim 1, characterized in that: in the step (1), the temperature of the photocatalyst liquid is controlled to be 20-40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610909076.5A CN106731784B (en) | 2016-10-18 | 2016-10-18 | Device for purifying formaldehyde in indoor air and formaldehyde removing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610909076.5A CN106731784B (en) | 2016-10-18 | 2016-10-18 | Device for purifying formaldehyde in indoor air and formaldehyde removing method thereof |
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| CN106731784A CN106731784A (en) | 2017-05-31 |
| CN106731784B true CN106731784B (en) | 2023-10-24 |
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| CN109632785B (en) * | 2019-01-23 | 2023-12-19 | 杭州霆科生物科技有限公司 | Detection device for quickly absorbing formaldehyde in air |
| CN110243027B (en) * | 2019-06-04 | 2021-02-02 | 成都钛洋环保科技有限公司 | Liquid phase circulation air purification device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2897401Y (en) * | 2006-01-13 | 2007-05-09 | 河北科技大学 | Methanal remover |
| EP1941939A1 (en) * | 2005-08-23 | 2008-07-09 | Jingang Li | A water-spraying air purifying apparatus and the purifying process thereof |
| CN204853699U (en) * | 2015-08-26 | 2015-12-09 | 北京科慧通智慧科技有限公司 | High -efficient purifier of room air |
| CN205402941U (en) * | 2016-03-04 | 2016-07-27 | 北京创新纪技术开发有限公司 | Indoor device for air purification |
| CN205561046U (en) * | 2016-04-20 | 2016-09-07 | 张晶 | Indoor formaldehyde detects and purifier |
-
2016
- 2016-10-18 CN CN201610909076.5A patent/CN106731784B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1941939A1 (en) * | 2005-08-23 | 2008-07-09 | Jingang Li | A water-spraying air purifying apparatus and the purifying process thereof |
| CN2897401Y (en) * | 2006-01-13 | 2007-05-09 | 河北科技大学 | Methanal remover |
| CN204853699U (en) * | 2015-08-26 | 2015-12-09 | 北京科慧通智慧科技有限公司 | High -efficient purifier of room air |
| CN205402941U (en) * | 2016-03-04 | 2016-07-27 | 北京创新纪技术开发有限公司 | Indoor device for air purification |
| CN205561046U (en) * | 2016-04-20 | 2016-09-07 | 张晶 | Indoor formaldehyde detects and purifier |
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