CN104406234A - Air purifier with alarm function - Google Patents

Air purifier with alarm function Download PDF

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Publication number
CN104406234A
CN104406234A CN201410500360.8A CN201410500360A CN104406234A CN 104406234 A CN104406234 A CN 104406234A CN 201410500360 A CN201410500360 A CN 201410500360A CN 104406234 A CN104406234 A CN 104406234A
Authority
CN
China
Prior art keywords
air
air purifier
screen pack
active carbon
purifier
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
CN201410500360.8A
Other languages
Chinese (zh)
Inventor
陈道斌
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 Bohan Environmental Protection Technology Co Ltd
Original Assignee
Suzhou Bohan Environmental Protection Technology Co Ltd
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 Suzhou Bohan Environmental Protection Technology Co Ltd filed Critical Suzhou Bohan Environmental Protection Technology Co Ltd
Priority to CN201410500360.8A priority Critical patent/CN104406234A/en
Publication of CN104406234A publication Critical patent/CN104406234A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/158Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using active carbon
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32Responding to malfunctions or emergencies
    • F24F11/39Monitoring filter performance

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Catalysts (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention discloses an air purifier with an alarm function. An initial effect purifying chamber is arranged on the lower portion of the air purifier; a colloidal cotton filter layer and a dirt probe are arranged in the middle of the initial effect purifying chamber; a first honeycombed supporting layer, an air filtering cotton filter sheet, a second honeycombed supporting plate, an activated carbon cloth filter sheet, a third honeycombed support plate and a formaldehyde filter screen are arranged in the air purifier from bottom to top in sequence; a first terminal air purifying box, an air purifying carbon filter layer, a catalyst activated carbon filter screen, a second terminal air purifying box, a coconut shell columnar activated carbon filter layer and an HEPA filter screen are further arranged above the formaldehyde filter screen in sequence; an air exchange chamber is arranged on the reverse side of the upper portion of the air purifier; an air exchange fan and an external fan cover are arranged in a round hole formed between the air exchange chamber and a shell; an alarm component for dirt removal and filter layer replacement is arranged in a square hole formed in the left side of the upper portion of the air purifier; an air outlet is formed in the air exchange chamber on the reverse side of the air purifier, and an air inlet is formed in the lower portion of the air purifier. The air purifier with the alarm function is economical and practical.

Description

A kind of air purifier with warning function
Technical field
The present invention relates to air cleaning facility, particularly for town-dweller-rural-family and indoor, public office space, the manufacture field of the air purifier that house and office occupancy use after especially solving finishing.
Background technology
Along with the continuous propelling of world industry, dust pollution, industrial pollution, tail gas pollution of motor-driven vehicle, indoor decoration pollution, automobile internal contamination, and the problem of refrigerator internal contamination is increasingly serious, the life of the mankind in the air pollution serious threat of modern society, the pollution day by day of room air, particularly serious on the impact of new residential houses personnel, after house decoraton finishing, the harmful and noxious substance such as pungent dazzling that ornament materials and furniture come out, as: first is autonomous, organic matter, stink, differently to hide, oxygen, benzene, carbon dioxide, the radioactive substances such as ammonia, its present situation is, new residential houses room air pollution, severe overweight, do not reach national Indoor Air Quality standards requirement (gb50325 and gb/t18883), and above-mentioned air-polluting present situation constitutes the great threat to new residential houses personnel health.
Now known air purifier product on the market, mainly based on to automobile, refrigerator, pet shelter, and the purification of small size house room air, the object that reaches national air quality standard design, can not solve large area house and indoor, the office space air that exceeds standard becomes the object of Indoor Air Quality standards through purification.
Summary of the invention
The object of this invention is to provide a kind of air purifier with warning function, to solve the problem that the indoor air that exceeds standard of large area house and office space reaches national air quality standard.Object of the present invention is realized by following technical scheme: a kind of air purifier with warning function, comprise automatic control system device, the cotton filter disc of air filtration, active carbon cloth filter, first is waken up screen pack, purification of air charcoal filter course, photocatalytic active carbon screen pack, coconut husk column-shaped active carbon filter course, HEPA screen pack, it is characterized in that: the bottom of this air purifier is provided with Chu Xiao clean room, the middle part of described Chu Xiao clean room is provided with the cotton filter course of gel and foul detecting head, the first honeycombed supporting plate and the cotton filter disc of air filtration is disposed with from bottom to top in air purifier, second honeycombed supporting plate and active carbon cloth filter, 3rd honeycombed supporting plate and first are waken up screen pack, the wake up top of screen pack of described first is also disposed with first terminal air purification box and purification of air charcoal filter course and photocatalytic active carbon screen pack, second terminal air purification cassette and coconut husk column-shaped active carbon filter course and HEPA screen pack, the back side on described air purifier top is provided with air-exchanging chamber, circular port between air-exchanging chamber and housing is provided with ventilation fan and external fan cover, the square opening of air purifier upper left-hand is provided with the warning piece that foul is removed and changed filtering layer, the top of air purifier is disposed with timer from right to left, power on light, first membrane keyboard at a slow speed, second middling speed membrane keyboard, 3rd quick touch key and stopping membrane keyboard, the floor seat of air purifier bottom is provided with the first slipmat and the second slipmat, the air-exchanging chamber of this air purifier top rear face has gas outlet, the left side of Chu Xiao clean room, bottom has air inlet.
In above-mentioned design, the present invention adopts eight layers of filter, to wake up for the first eliminated in the waste gas that produces under PE and new home room air, the pernicious gas such as benzene homologues, ammonia and remove the different needs of hiding of finishing.As waken up concerning the first in the waste gas produced under PE and new home room air, the pernicious gas such as benzene homologues, ammonia and remove decorations peculiar smell, after filter screen filtration sterilization that the present invention carries out the filtration of air filtration cotton to it, active carbon cloth filters, first is waken up, then carry out the filtration of purification of air charcoal, photocatalytic active carbon filter screen filtration, the filtration of coconut husk column-shaped active carbon and the process of HEPA filter screen filtration.
Compared with prior art (on the basis of existing air purifier process), the peculiar smell that the pernicious gas molecules such as the first in the waste gas produced under the present invention is directed to PE and new home room air is waken up, benzene homologues, ammonia and decorations produce, adds automatic control system device, the cotton filter disc of air filtration, active carbon cloth filter, first wakes up the treatment steps such as screen pack, purification of air charcoal filter course, photocatalytic active carbon screen pack, coconut husk column natural pond property charcoal filter course, HEPA filter screen filtration.In the present invention, foul detecting head in automatic control system and warning piece can effectively normally work, reminding user cleaning foul and replacing filtering layer, effectively perceive the particle contamination degree in each filtering layer and clean level, when dirt storage is to nominal position, namely foul detecting head in control system starts warning voluntarily, after filtering layer foul to be cleaned, alarm lamp is closed automatically, thus reach the instant object removing filtering layer foul, meanwhile, and there is wind speed regulatory function, adjustablely to purify at a slow speed, middling speed purification, fast purification and 1,4,6,8 hour timing, Chu Xiao clean room, the cotton filter disc of air filtration can effective absorption peanut coat, point pericarp, paper scrap, scurf, hair, fiber, pollen and other foreign material, make foreign material not in volatilization absorption on the surface of filter cotton filter disc, immediately to remove, filtering layer is regenerated, restore funcitons: active carbon cloth filter can thin dirt effectively in filtered air and dirty mist, remove organic vapor, benzene class, chlorine, third is intoxicated, alcohols, this limb class, carbon disulfide, three chloromethane a heatable brick bed, with chlorination carbon, chloroform, Australia's first a heatable brick bed, chloromethane a heatable brick bed, nitro a heatable brick bed, chloropicrin, common salt, differently to hide, bacterium, differently smell thing and filter the dust of 0.3 micron and be less than the dust granule of 2.5 microns, first screen pack of waking up effectively can remove autonomous and other VOC of first, removes dust and pollen, purification of air charcoal filter course and photocatalytic active carbon screen pack are the 5th fat line, effectively can filter industrial chemicals gas, chemical industry forming gas, carbon dioxide, hydrogen, nitrogen, chlorine, cracked gas etc., and effectively remove a large amount of fine particle, differently to hide and pernicious gas, limit absorption, limit are decomposed, and can not produce secondary pollution, coconut husk column-shaped active carbon filter course, HEPA screen pack are the 8th defence line, again can tackle and remove benzene, first is waken up, the toxic and harmful such as ammonia, remove the gaseous contaminant in air and harmful rotten material, there is antimicrobial coating, remove tiny dust and flue gas, eliminate bacterium and mould, particle removal rate, up to more than 99.97%, makes air cleaning pure and fresh simultaneously.
The present invention has following features: 1, foul detecting head in automatic control system and warning piece can effectively normally work, reminding user cleaning foul and replacing filtering layer, effectively perceive the particle contamination degree in each filtering layer and clean level, when dirt storage is to nominal position, namely foul detecting head in control system starts warning voluntarily, after filtering layer foul to be cleaned, alarm lamp is closed automatically, thus reach the instant object removing filtering layer foul, simultaneously, and there is wind speed regulatory function, adjustablely to purify at a slow speed, middling speed purifies, fast purification and 1, 4, 6, the timing of 8 hours.2, can effectively absorption peanut coat, sharp pericarp, paper scrap, scurf, hair, fiber, pollen and other foreign material, make foreign material not be adsorbed on the surface of filter cotton filter disc in volatilization, immediately to remove, filtering layer is regenerated and restore funcitons.3, can thin dirt effectively in filtered air and dirty mist, remove organic vapor, benzene class, chlorine, third intoxicated, alcohols, this limb class, carbon disulfide, three chloromethane a heatable brick bed, carbon tetrachloride, chloroform, Australia's first: Anhui, chloromethane a heatable brick bed, nitro a heatable brick bed, chloropicrin, common salt, differently to hide, bacterium, differently smell thing and filter the dust of 0.3 micron and be less than the dust granule mouth of 2.5 microns.4, effectively can remove first to wake up and other VOC, remove dust and pollen.5, effectively can filter industrial chemicals gas, chemical industry forming gas, carbon dioxide, hydrogen, nitrogen, chlorine, cracked gas etc., and effectively remove a large amount of fine particle, peculiar smell and pernicious gas, limit absorption, limit are decomposed, and can not produce secondary pollution.6, can effectively again tackle remove benzene, first is waken up, the toxic and harmful such as ammonia, remove the gaseous contaminant in air and harmful rotten material, there is antimicrobial coating, remove tiny dust and flue gas, eliminate bacterium and mould simultaneously, particle removal rate, up to more than 99.97%, makes air cleaning pure and fresh, thus makes air more clean pure and fresh.7, the air quality after purification is better than national Indoor Air Quality standards requirement.
The present invention is economic and practical, and purification effect significantly, is particularly suitable for town-dweller-rural-family and office space and new home family and uses.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the device schematic diagram of one embodiment of the invention.
Fig. 2 is the structure chart of air cleaner equipment shown in Fig. 1.
Detailed description of the invention
Fig. 1 illustrates that air cleaner equipment of the present invention is equipped with the situation of purification power, for public office space and family are used, first timer 1 is adjusted to desired location, select wind speed button 2 simultaneously and start ventilation fan, under the effect of purification power, former air enters into apparatus of the present invention from air inlet 3 and carries out purified treatment, and the pure air after process flows out from the gas outlet 4 at housing back then can.
In Fig. 2, the airtight casing that air cleaner equipment is made up of housing a and shroud upper panel b, housing a and shroud upper panel b is formed by connecting by buckle, the bottom of this air purifier is provided with Chu Xiao clean room 14 (which is provided with air-inlet grille), the middle part of described Chu Xiao clean room 14 is provided with the cotton filter course 15 of gel and foul detecting head 16, the first honeycombed supporting plate 17 and the cotton filter disc 18 (length 380mmX width 60mmX thickness 12mm) of air filtration is disposed with from bottom to top in air purifier, second honeycombed supporting plate 19 and active carbon cloth filter 20 (length 380mmX width 160mmX thickness 4mm), second honeycombed supporting plate 21 and first are waken up screen pack 22 (length 380mmX width 160mmX thickness 5mm), the wake up top of screen pack 22 of described first is also disposed with first terminal wall gas purification cassette 23 and purification of air charcoal filter course 24 (granularity is 1.3-1.4mm) and photocatalytic active carbon screen pack 25 (length 380mmX width 160mmX thickness 4mm), second terminal air purification cassette 26 and coconut husk column-shaped active carbon filter course 27 (diameter 1.3mmX length 3.5mm) and HEPA screen pack 28 (length 380mmX width 160mmX thickness 5mm), the gross area of above-mentioned purifying layer is greater than 0.31m 2, the back side on described air purifier top is provided with air-exchanging chamber 31, circular port between air-exchanging chamber and housing is provided with ventilation fan 29 and external fan cover 30, the square opening 32 of air purifier upper left-hand is provided with the warning piece 33 that foul is removed and changed filtering layer, the top of air purifier is disposed with timer 34 from right to left, power on light 35, first membrane keyboard 36 at a slow speed, second middling speed membrane keyboard 37, second quick touch key 38 and stopping membrane keyboard 39, the floor seat 40 of air purifier bottom is provided with the first slipmat 41 and the second slipmat button, the air-exchanging chamber of this air purifier top rear face has gas outlet d, the left side of Chu Xiao clean room, bottom has air inlet C.
See Fig. 1, from the process of purification of air process, former air enters from the Chu Xiao clean room air cleaner equipment through air inlet 3, filters, active carbon cloth filters, first wakes up filter screen filtration, purification of air charcoal filters, after the sterilization of photocatalytic active carbon filter screen filtration, carries out the filtration of coconut husk column-shaped active carbon and HEPA filter screen filtration again first through air filtration cotton.After multiple filtration sterilization, become clean pure and fresh wall gas, the gas outlet 4 on back side of shell is flowed out.
In addition, housing of the present invention can adopt food grade plastic material, to meet hygienic requirements.

Claims (3)

1. one kind has the air purifier of warning function, comprise automatic control system device, the cotton filter disc of air filtration, active carbon cloth filter, first is waken up screen pack, purification of air charcoal filter course, photocatalytic active carbon screen pack, coconut husk column-shaped active carbon filter course, HEPA screen pack, it is characterized in that: the bottom of this air purifier is provided with Chu Xiao clean room (14), the middle part of described Chu Xiao clean room (14) is provided with the cotton filter course (15) of gel and foul detecting head (16), the first honeycombed supporting plate (17) and the cotton filter disc (18) of air filtration is disposed with from bottom to top in wall gas purifier, second honeycombed supporting plate (19) and active carbon cloth filter (20), 3rd honeycombed supporting plate (21) and first are waken up screen pack (22), the wake up top of screen pack (22) of described first is also disposed with first terminal air purification box (23) and purification of air charcoal filter course (24) and photocatalytic active carbon screen pack (25), second terminal air purification cassette (26) and coconut husk column-shaped active carbon filter course (27) and HEPA screen pack (28), the back side on described air purifier top is provided with air-exchanging chamber (31), circular port between air-exchanging chamber and housing is provided with ventilation fan (29) and external fan cover (30), the square opening (32) of air purifier upper left-hand is provided with the warning piece (33) that foul is removed and changed filtering layer, the top of air purifier is disposed with timer (34) from right to left, power on light (35), first membrane keyboard (36) at a slow speed, second middling speed membrane keyboard (37), second quick touch key (38) and stopping membrane keyboard (39), the floor seat (40) of air purifier bottom is provided with the first slipmat (41) and the second slipmat (42), the air-exchanging chamber of this air purifier top back of the body rain has gas outlet (d), the left side of Chu Xiao clean room, bottom has air inlet (c).
2. the air purifier with warning function according to claim 1, its feature is at son, the specification of the cotton filter disc of the air filtration in described air purifier is: length 380mmX width 160mmX thickness 12mm, the specification of active carbon cloth filter is: length 380mmX width 160mmX thickness 4mm, the specification of the liquor-saturated screen pack of first is: length 380mmX width 160mmX thickness 5mm, the granularity of purification of air charcoal filter course is 1.3-1.4mm, the specification of photocatalytic active carbon screen pack is: length 380mmX width 160mmX thickness 4mm, the specification of coconut husk column-shaped active carbon filter course is: diameter 1.3mmX length 3.5mm, the specification of HEPA screen pack is: length 380mmX width 160mmX thickness 5mm, the area of gross decontamination layer is greater than 0.31m 2.
3. according to the air purifier with warning function described in claim 2, it is characterized in that, the airtight casing of described air purifier is formed by connecting by housing and shroud upper panel buckle.
CN201410500360.8A 2014-09-26 2014-09-26 Air purifier with alarm function Pending CN104406234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410500360.8A CN104406234A (en) 2014-09-26 2014-09-26 Air purifier with alarm function

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Application Number Priority Date Filing Date Title
CN201410500360.8A CN104406234A (en) 2014-09-26 2014-09-26 Air purifier with alarm function

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507249A (en) * 2018-12-20 2019-03-22 汉威科技集团股份有限公司 A kind of new gas detector with self-cleaning function
CN111265943A (en) * 2020-03-20 2020-06-12 吴瑾 Preposed iatrogenic smoke filter

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259142B (en) * 1991-08-27 1995-04-05 Samsung Electronics Co Ltd A condensate tank of a dehumidifier
JP2001330340A (en) * 2000-05-25 2001-11-30 Nissin Electric Co Ltd Electronic dehumidifier
CN201251250Y (en) * 2008-07-28 2009-06-03 罗兴富 Household air purifier for urban and rural
CN201410350Y (en) * 2009-06-22 2010-02-24 周建 Vehicle-mounted air purifier
CN201935303U (en) * 2011-03-15 2011-08-17 成都市飞龙水处理技术研究所 Air purifier with full-automatic alarm device
CN103851706A (en) * 2014-03-20 2014-06-11 四川金堂海纳生物医药技术研究所 Air cleaner with alarm function and manufacturing method thereof
CN203731574U (en) * 2014-03-20 2014-07-23 任云翠 Air purifier provided with alarm function
CN104296252A (en) * 2014-09-19 2015-01-21 苏州博菡环保科技有限公司 Air purifier with warning function and manufacturing method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259142B (en) * 1991-08-27 1995-04-05 Samsung Electronics Co Ltd A condensate tank of a dehumidifier
JP2001330340A (en) * 2000-05-25 2001-11-30 Nissin Electric Co Ltd Electronic dehumidifier
CN201251250Y (en) * 2008-07-28 2009-06-03 罗兴富 Household air purifier for urban and rural
CN201410350Y (en) * 2009-06-22 2010-02-24 周建 Vehicle-mounted air purifier
CN201935303U (en) * 2011-03-15 2011-08-17 成都市飞龙水处理技术研究所 Air purifier with full-automatic alarm device
CN103851706A (en) * 2014-03-20 2014-06-11 四川金堂海纳生物医药技术研究所 Air cleaner with alarm function and manufacturing method thereof
CN203731574U (en) * 2014-03-20 2014-07-23 任云翠 Air purifier provided with alarm function
CN104296252A (en) * 2014-09-19 2015-01-21 苏州博菡环保科技有限公司 Air purifier with warning function and manufacturing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507249A (en) * 2018-12-20 2019-03-22 汉威科技集团股份有限公司 A kind of new gas detector with self-cleaning function
CN111265943A (en) * 2020-03-20 2020-06-12 吴瑾 Preposed iatrogenic smoke filter

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