CN106807199A - A kind of air purifier - Google Patents

A kind of air purifier Download PDF

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Publication number
CN106807199A
CN106807199A CN201710039685.4A CN201710039685A CN106807199A CN 106807199 A CN106807199 A CN 106807199A CN 201710039685 A CN201710039685 A CN 201710039685A CN 106807199 A CN106807199 A CN 106807199A
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CN
China
Prior art keywords
purification
air
bottles
air purifier
built
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.)
Pending
Application number
CN201710039685.4A
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Chinese (zh)
Inventor
阮鹏
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.)
First Affiliated Hospital of Chengdu Medical College
Original Assignee
First Affiliated Hospital of Chengdu Medical College
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Filing date
Publication date
Application filed by First Affiliated Hospital of Chengdu Medical College filed Critical First Affiliated Hospital of Chengdu Medical College
Priority to CN201710039685.4A priority Critical patent/CN106807199A/en
Publication of CN106807199A publication Critical patent/CN106807199A/en
Pending legal-status Critical Current

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    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1487—Removing organic compounds
    • 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
    • B01D53/14—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 by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • 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
    • B01D53/38—Removing components of undefined structure
    • B01D53/40—Acidic components
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • 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
    • B01D53/864—Removing carbon monoxide or hydrocarbons
    • 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
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8681—Acidic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/306—Alkali metal compounds of potassium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/202—Alcohols or their derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/502—Carbon monoxide
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

The invention provides a kind of air purifier, it is intended to solve the problems, such as not enough existing air purifier clean-up effect, unitary function and relatively costly.Air purifier includes passing sequentially through a purification bottle, No. two purification bottles, No. three purification bottles and No. four purification bottles that connecting tube is tightly connected, and air inlet pipe is connected with a purification bottle, and No. four purification bottles are provided with escaping pipe；A number purification bottle is built with ethanol solution；Acid permanganate soln of No. two purification bottles built with chloride containing palladium；No. three purification bottles are built with alkaline solution；No. four purification bottles are built with neutral water.Air uses ethanol organic dissolution in the present invention, and acid, alkali chemically react with the pollutant in air respectively, thoroughly eliminate hazards of pollutants, while repeatedly washing, liquid is washed the dust allowed in air and is also greatly reduced.Clean-up effect of the present invention is satisfactory.When IAQ is serious pollution, half an hour can reach good level.Cost of material is low, it is easy to obtain, and late maintaining is cheap.

Description

A kind of air purifier
Technical field
The present invention relates to a kind of air cleaning unit, more particularly to a kind of air purifier.
Background technology
Air purifier on the market is mainly what is filtered by screen pack at present, and price is high.Small part is net Change device and indicate anion generator function, reality electroprobe detection anion is empty mark, and anion can light electroprobe, therefore To check all kinds of air purifiers of in the market.Contrasted by long-term use, it is found that these product prices are somewhat expensive, and also lack New-air purifying system, not yet with the situation for coming into huge numbers of families, and the empty mark of many clarifiers is more, in addition pollutants in air Various, filtering can only solve subproblem, therefore actual effect is limited, and screen pack also needs more to slide frequently, and maintenance cost is high.
The content of the invention
The invention provides a kind of air purifier, it is intended to solve existing air purifier clean-up effect deficiency, function Single and relatively costly problem.
In order to solve the above technical problems, the present invention is achieved through the following technical solutions：
A kind of air purifier, including pass sequentially through a purification bottle that connecting tube is tightly connected, No. two purification bottles, No. three Purification bottle and No. four purification bottles, are connected with air inlet pipe on a purification bottle, No. four purification bottles are provided with escaping pipe；In a number purification bottle Equipped with ethanol solution；Acid permanganate soln of No. two purification bottles built with chloride containing palladium；No. three purification bottles are built with alkalescence Solution；No. four purification bottles are built with neutral water.
Haze composition is main based on dust and sour gas.Dust can be precipitated by the effect of water, absorption；Sour gas Body can react after being dissolved in water with alkaline matter, lose toxicity and harm.The present invention uses acid permanganate soln, Plus chlorination palladium chtalyst, acid potassium permanganate can add hydrochloric acid etc. to increase acidity, in this way, intractable carbon monoxide is normal Eliminated the need under temperature.Heavy metal dusts can be removed through water smoke.
The liquid that a number purification bottle is mixed into for water and appropriate ethanol, the mass ratio shared in the mixture of ethanol exists 1%~60%, wherein ethanol Main Function is to dissolve polycyclic aromatic hydrocarbon pollutant and other are soluble in the organic pollution of ethanol, together Shi Fenchen, sour gas etc. also can be adsorbed or be sunken to water in this link.But ethanol is unsuitable excessive, and otherwise volatility is big.It is few The ethanol that amount is volatilized may be elegant into B, and ethanol is eliminated because ethanol can be reacted with potassium permanganate.
It is potassium permanganate, sulfuric acid and hydrochloric acid in No. two purification bottles, or sulfuric acid and nitric acid, or hydrochloric acid is configured to jointly with nitric acid Strong acidity solution, pH value is between 1~7, while add micro palladium bichloride as catalyst, can make carbon monoxide with Potassium permanganate is reacted, and carbon monoxide is eliminated under normal temperature.Palladium bichloride is poisonous, but as catalyst, only needs micro.
No. three purification bottles are the solution compared with strong basicity, pH value between 7-14, the main sour gas eliminated in air-flow, with And from No. two acidic materials of purification bottle.
No. four purification bottles are neutral water, can add aromatic substance, improve indoor climate.
Further, the air inlet pipe includes the indoor air inlet pipe in connection outdoor outside air-intake duct and communication chamber.Not only Fresh outdoor air can be changed, and can be with the air in circularly purifying room.
Further, the outside air-intake duct is provided with air intake pump.
Further, it is connected with circulation pipe between a purification bottle and No. four purification bottles.It is easy to containing high density pollution thing Air carries out multiple times of filtration, to improve clean-up effect.
Further, circulation pipe is provided with gas circulator, and escaping pipe is provided with out air pump.
Further, a purification bottle, water pump and some is equipped with No. two purification bottles, No. three purification bottles and No. four purification bottles The individual shower nozzle being connected with water pump.The spraying system of water pump and several shower nozzle being connected with water pump compositions, in the form of spraying, The contact area of scavenging solution and air can be improved, so as to improve clean-up effect.
Further, connecting tube is obliquely installed and outlet side is higher than inlet end.
Further, connecting tube outlet side is equipped with Non-return air valve.The air return of purification is prevented, is mixed.Different purification bottles Between with inclined pipeline connect, it is therefore an objective to allow the liquid of ejection to flow back, it is to avoid the liquid of a upper purification bottle mixes next In individual purification bottle.Non-return air valve can also be set in outside air-intake duct, escaping pipe and indoor air inlet pipe.
Further, it is provided with dismountable drying device in escaping pipe.It is easy to the air after dry decontamination.Such as it is not required to increase Moisture, then this drying device can take out, drying device can be using dry ball etc..
Further, air purifier also includes shell, and shell is provided with the sensor of detection air quality.Sensor includes Air quality index sensor, humidity sensor, temperature sensor etc..Whole clarifier can be hung outside wall, and interior only needs placement Air outlet, sensor display screen, remote control arrangement after purification etc., it is to avoid the issuable noise of clarifier gets in, Save the interior space.
Compared with prior art it is an advantage of the invention that：
Air uses ethanol organic dissolution in the present invention, and acid, alkali chemically react with the pollutant in air respectively, can Thoroughly to eliminate the hazards of pollutants in air, or even part poison gas is also acted on elimination, to the microorganism in air Also the killing action with multiple link, while repeatedly washing, liquid are washed the dust allowed in air and is also greatly reduced.By Research practice, the technology of the present invention reliability, clean-up effect is satisfactory.When IAQ is serious pollution, half an hour can To reach good level.Cost of material is low, it is easy to obtain, and late maintaining is cheap, with great marketing potentiality.Can use In places such as family, office space, school, hospital, workshops, the space needed to having anti-chemical weapon, poison gas is also suitable.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be attached to what is used needed for embodiment Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not to be taken as to model The restriction enclosed, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these Accompanying drawing obtains other related accompanying drawings.
Fig. 1 is structural representation of the invention.
Fig. 2 is No. two internal structure schematic diagrams of purification bottle in the present invention.
Specific embodiment
In the description of the invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", Terms such as " fixations " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be with It is to mechanically connect, can be directly connected to, or be indirectly connected to by intermediary, can is two companies of element internal Logical or two interaction relationships of element.For those of ordinary skills, on can understanding as the case may be State term concrete meaning in the present invention.
Refering to Fig. 1 and Fig. 2, the direction of arrow is air-flow direction in accompanying drawing.A kind of air purifier, including pass sequentially through The purification bottle 3 of purification bottle 2, three of the purification bottle that connecting tube 5 is tightly connected 1, two and No. four purification bottles 4, a purification bottle 1 On be connected with air inlet pipe, No. four purification bottles 4 are provided with escaping pipe 13.Air inlet pipe includes the outdoor outside air-intake duct 6 of connection and connects Indoor indoor air inlet pipe 7.Dismountable drying device 17 is provided with escaping pipe 13.The outside air-intake duct 6 be provided with into Air pump 8.Connecting tube 5 is obliquely installed and outlet side is higher than inlet end.The outlet side of connecting tube 5 is equipped with Non-return air valve 16.
A number purification bottle 1 is built with ethanol solution；No. two purification bottles 2 are molten built with the acid potassium permanganate of chloride containing palladium Liquid；No. three purification bottles 3 are built with alkaline solution；No. four purification bottles 4 are built with neutral water.A number purification bottle 1 and No. four purification bottles 4 Between be connected with circulation pipe 9.Circulation pipe 9 is provided with gas circulator 10, and escaping pipe 13 is provided with out air pump 12.Number purification bottle 1, Water pump 14 and several shower nozzles being connected with water pump 14 are equipped with 2, No. three purification bottles 3 of No. two purification bottles and No. four purification bottles 4 15, water pump 14 is arranged in scavenging solution body, and shower nozzle 15 is sequentially connected by pipeline 11.For 1, No. three purification bottles of a purification bottle 3 and No. four purification bottles 4, internal structure is identical with No. two operation principles of purification bottle 2, is no longer shown in accompanying drawing.
Air purifier also includes shell 18, and shell 18 is provided with the sensor of detection air quality.
Specific embodiment of the invention is the foregoing is only, but technical characteristic of the invention is not limited thereto, Ren Heben The technical staff in field in the field of the invention, all cover among the scope of the claims of the invention by the change or modification made.

Claims (10)

1. a kind of air purifier, it is characterized in that：Including passing sequentially through purification bottle (1), two that connecting tube (5) is tightly connected Number purification bottle (2), No. three purification bottles (3) and No. four purification bottles (4), are connected with air inlet pipe, No. four purification bottles on a purification bottle (1) (4) it is provided with escaping pipe (13)；
A number purification bottle (1) is built with ethanol solution；No. two purification bottles (2) are molten built with the acid potassium permanganate of chloride containing palladium Liquid；No. three purification bottles (3) are built with alkaline solution；No. four purification bottles (4) are built with neutral water.
2. a kind of air purifier according to claim 1, it is characterized in that：The air inlet pipe includes the outdoor outdoor of connection Indoor air inlet pipe (7) in air inlet pipe (6) and communication chamber.
3. a kind of air purifier according to claim 2, it is characterized in that：The outside air-intake duct (6) is provided with air inlet Pump (8).
4. a kind of air purifier according to claim 1, it is characterized in that：A number purification bottle (1) and No. four purification bottles (4) Between be connected with circulation pipe (9).
5. a kind of air purifier according to claim 4, it is characterized in that：Circulation pipe (9) is provided with gas circulator (10), escaping pipe (13) is provided with out air pump (12).
6. a kind of air purifier according to claim 1, it is characterized in that：Number purification bottle (1), No. two purification bottles (2), Water pump (14) and several shower nozzles (15) being connected with water pump (14) are equipped with No. three purification bottles (3) and No. four purification bottles (4).
7. a kind of air purifier according to claim 1, it is characterized in that：Connecting tube (5) is obliquely installed and outlet side Higher than inlet end.
8. a kind of air purifier according to claim 1, it is characterized in that：Connecting tube (5) outlet side is equipped with unidirectional gas Valve (16).
9. a kind of air purifier according to claim 1, it is characterized in that：Dismountable drying is provided with escaping pipe to fill Put (17).
10. a kind of air purifier according to claim 1, it is characterized in that：Air purifier also includes shell (18), outward Shell is provided with the sensor of detection air quality.
CN201710039685.4A 2017-01-19 2017-01-19 A kind of air purifier Pending CN106807199A (en)

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CN201710039685.4A CN106807199A (en) 2017-01-19 2017-01-19 A kind of air purifier

Publications (1)

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CN106807199A true CN106807199A (en) 2017-06-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107983065A (en) * 2017-11-23 2018-05-04 郑州诚合信息技术有限公司 Photocatalysis rinsing type industrial waste-gas purifier
CN108525479A (en) * 2018-04-23 2018-09-14 任臻臻 A kind of school duty room air detection and purifier
CN109663383A (en) * 2017-10-16 2019-04-23 沈阳朗新环保设备有限公司 A kind of precision machinery processing coolant liquid cleaning equipment

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1389288A (en) * 2001-06-05 2003-01-08 李志德 Absorbing liquid-type air purifier
CN2675130Y (en) * 2004-01-12 2005-02-02 刘洪喜 Air purifying sterilizing apparatus
CN101450275A (en) * 2007-12-04 2009-06-10 中国石油化工股份有限公司 Treatment method of odor gas containing sulfur and dust
CN102476016A (en) * 2010-11-24 2012-05-30 大连创达技术交易市场有限公司 Apparatus for purifying air by liquid
CN203244887U (en) * 2013-03-28 2013-10-23 深圳三马电器有限公司 Washing type air purifier
CN203469728U (en) * 2013-02-18 2014-03-12 程国琇 Double-air-inlet multi-stage washing air purifier
CN203484009U (en) * 2013-08-13 2014-03-19 广东达华节水科技股份有限公司 Compound water-wash air purifier
CN104896605A (en) * 2015-06-09 2015-09-09 周依琳 Air purifier
CN204693654U (en) * 2015-06-09 2015-10-07 周依琳 A kind of air purifier
CN105032151A (en) * 2015-07-15 2015-11-11 黄国杰 Air purification method and device
CN105605690A (en) * 2016-01-21 2016-05-25 西北大学 Indoor air purifying system and method based on wet filtering

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1389288A (en) * 2001-06-05 2003-01-08 李志德 Absorbing liquid-type air purifier
CN2675130Y (en) * 2004-01-12 2005-02-02 刘洪喜 Air purifying sterilizing apparatus
CN101450275A (en) * 2007-12-04 2009-06-10 中国石油化工股份有限公司 Treatment method of odor gas containing sulfur and dust
CN102476016A (en) * 2010-11-24 2012-05-30 大连创达技术交易市场有限公司 Apparatus for purifying air by liquid
CN203469728U (en) * 2013-02-18 2014-03-12 程国琇 Double-air-inlet multi-stage washing air purifier
CN203244887U (en) * 2013-03-28 2013-10-23 深圳三马电器有限公司 Washing type air purifier
CN203484009U (en) * 2013-08-13 2014-03-19 广东达华节水科技股份有限公司 Compound water-wash air purifier
CN104896605A (en) * 2015-06-09 2015-09-09 周依琳 Air purifier
CN204693654U (en) * 2015-06-09 2015-10-07 周依琳 A kind of air purifier
CN105032151A (en) * 2015-07-15 2015-11-11 黄国杰 Air purification method and device
CN105605690A (en) * 2016-01-21 2016-05-25 西北大学 Indoor air purifying system and method based on wet filtering

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109663383A (en) * 2017-10-16 2019-04-23 沈阳朗新环保设备有限公司 A kind of precision machinery processing coolant liquid cleaning equipment
CN107983065A (en) * 2017-11-23 2018-05-04 郑州诚合信息技术有限公司 Photocatalysis rinsing type industrial waste-gas purifier
CN108525479A (en) * 2018-04-23 2018-09-14 任臻臻 A kind of school duty room air detection and purifier

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Application publication date: 20170609