CN105371399B - Air cleaning unit - Google Patents
Air cleaning unit Download PDFInfo
- Publication number
- CN105371399B CN105371399B CN201510873260.4A CN201510873260A CN105371399B CN 105371399 B CN105371399 B CN 105371399B CN 201510873260 A CN201510873260 A CN 201510873260A CN 105371399 B CN105371399 B CN 105371399B
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- China
- Prior art keywords
- air
- ventilation shaft
- clean
- cleaning unit
- air inlet
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, 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
- F24F8/108—Treatment, 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The present invention provides a kind of air cleaning unit, including:The first end of ventilation shaft, the ventilation shaft is air inlet, and the second end of ventilation shaft is air outlet;Purification system is arranged in the ventilation shaft and between the air inlet and air outlet, and the purification system includes the purifying part made of modified acrylic fibre;Wind turbine is arranged in the ventilation shaft, and the wind turbine is sent out the air after the purification system by air outlet for being pumped by air inlet air.The present invention can improve air purification effect.
Description
Technical field
The present invention relates to cleaning equipment more particularly to a kind of air cleaning units.
Background technology
Industrialized aquiculture needs whole uninterrupted inflation, and to increase the dissolved oxygen in breeding water body, air source is typically all
Directly utilize air.Air with the fast development of China's economy, air pollution problems inherent getting worse, pollution contains titanium dioxide
The harmful substances such as sulphur, nitrogen oxides contain a large amount of viruses, bacterium, after dissolving in water, cultured fishes are generated with larger danger simultaneously
Evil, especially endangers bigger to fry.
Currently, industrialized aquiculture carries out only the air being passed through in breeding water body usually using air filter
Change, existing air purifier generally includes ventilation shaft, and one end of ventilation shaft is air inlet, and the other end of ventilation shaft is
Air outlet is equipped with filter device and wind turbine in ventilation shaft, so that air is entered ventilation shaft by air inlet by the startup of wind turbine,
It is sent out by air outlet by the filtered air of filter device.
The filter device of existing air purifier mostly uses high efficiency particle air filter (High efficiency
Particulate air Filter, abbreviation HEPA) or activated carbon, it is net since this kind of material is poor to subparticle absorption
It is poor to change effect.
Invention content
The present invention provides a kind of air cleaning unit, to improve air purification effect.
The present invention provides a kind of air cleaning unit, including:
The first end of ventilation shaft, the ventilation shaft is air inlet, and the second end of ventilation shaft is air outlet;
Purification system is arranged in the ventilation shaft and between the air inlet and air outlet, the purification system
System includes the purifying part made of modified acrylic fibre;
Wind turbine is arranged in the ventilation shaft, and the wind turbine will pass through described for air to be pumped by air inlet
Air after purification system is sent out by air outlet.
Based on above-mentioned, air cleaning unit provided by the invention, when wind turbine starts, air can be pumped by air inlet, and
Air after purification system is sent out by air outlet, since purification system includes the purification being made of modified acrylic fibre
Component, and modified acrylic fibre is stronger for the adsorption capacity of little particle and oiliness particle, therefore when air is by being modified
After polyacrylonitrile fibre, little particle and oiliness particle in the air polyacrylonitrile fibre that can be modified are adsorbed, and are which thereby enhanced
The air purification effect of air cleaning unit.Simultaneously because modified acrylic fibre is easy to clean, therefore it is net to improve air
The convenience of cleaning is set in makeup.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of air cleaning unit provided in an embodiment of the present invention;
Fig. 2 is a kind of lateral plan of the purification system of air cleaning unit provided in an embodiment of the present invention;
Fig. 3 is a kind of vertical view of the purification system of air cleaning unit provided in an embodiment of the present invention;
Fig. 4 is a kind of structural schematic diagram of the diversion section of air cleaning unit provided in an embodiment of the present invention;
Fig. 5 is the structural schematic diagram of another air cleaning unit provided in an embodiment of the present invention.
Reference numeral:
101:Ventilation shaft; 102:Air inlet;
103:Air outlet; 104:Modified acrylic fibre;
105:Wind turbine; 106:Ultraviolet lamp;
107:Photocatalyst layer; 108:Scavenging material layer;
109:Glass fibre; 110:Clean unit;
111:UV lamp unit; 112:Diversion section;
113:Clean-up stage; 114:Deflector;
115:Metal screen; 116:Fibre bundle.
Specific implementation mode
Embodiment one, referring to FIG. 1, the embodiment of the present invention provides a kind of air cleaning unit, including ventilation shaft 101,
The first end of the ventilation shaft 101 is air inlet 102, and the second end of ventilation shaft 101 is air outlet 103;Purification system, if
It sets in the ventilation shaft 101 and between the air inlet 102 and air outlet 103, the purification system includes by changing
Purifying part made of property polyacrylonitrile fibre 104;Wind turbine 105 is arranged in the ventilation shaft 101, and the wind turbine 105 is used
In air to be pumped by air inlet 102, and the air after the purification system is sent out by air outlet 103.
In the present embodiment, when wind turbine 105 starts, air can be pumped by air inlet 102, and the sky after purification system
Gas is sent out by air outlet 103, since purification system includes the purifying part being made of modified acrylic fibre 104, and it is modified
Polyacrylonitrile fibre 104 is stronger for the adsorption capacity of little particle and oiliness particle, therefore when air passes through modified polyacrylonitrile
After fiber 104, little particle and oiliness particle in the air polyacrylonitrile fibre 104 that can be modified are adsorbed, and sky is which thereby enhanced
The air purification effect of air purifying apparatus.Simultaneously because modified acrylic fibre 104 is easy to clean, therefore it is net to improve air
The convenience of cleaning is set in makeup.
In the present embodiment, it is preferred that purification system further includes ultraviolet lamp 106 and photocatalyst layer 107, the ultraviolet lamp
106 for irradiating the photocatalyst layer 107.As a result, when air passes through ultraviolet lamp 106, by the irradiation of ultraviolet lamp 106,
Air can be sterilized, be sterilized, simultaneously as ultraviolet lamp 106 can irradiate photocatalyst layer 107, thus can play light
Catalytic action, and then the harmful substance in air is decomposed, further improve the air purification effect of air cleaning unit.
Embodiment two, please refers to Fig.2 and Fig. 3, and on the basis of embodiment one, the purifying part is scavenging material layer
108, the scavenging material layer 108 includes the modified acrylic fibre 104 and glass fibre 109, the glass fibre 109
Surface is coated with the photocatalyst layer 107, axial direction setting of the scavenging material layer 108 along the ventilation shaft 101.Due to
Scavenging material layer 108 is arranged along the axial direction of ventilation shaft 101, therefore windage is small, and air mass flow can be improved and avoid blocking.While by
It is made of modified acrylic fibre 104 and glass fibre 109 in scavenging material layer 108, and photocatalyst layer 107 is formed in glass
109 surface of glass fiber so that scavenging material layer 108 is little particle and oiliness particle in adsorbable air, and can rise
To photocatalysis, setting is convenient, saves space.In addition, since photocatalyst layer 107 can easily be plated on glass fibre
109 surfaces, therefore facilitate manufacture.Wherein, glass fibre 109 can in incorporating modified polyacrylonitrile fibre 104, can also with change
Property polyacrylonitrile fibre 104 carry out glued or braiding and constitute scavenging material layer 108.Certainly, modified polyacrylonitrile also can only be utilized
Fiber constitutes scavenging material layer 108, then the load bearing component of photocatalyst layer 107 is separately provided, and coordinates with ultraviolet lamp 106 and carry out
Photocatalysis.
In the present embodiment, it is preferred that purification system includes at least one clean unit 110, and the clean unit 110 includes
UV lamp unit 111 and the scavenging material layer 108 positioned at 111 top and bottom of the UV lamp unit;The ultraviolet lamp
Unit 111 is intervally arranged by multiple ultraviolet lamps 106 and is constituted, and the UV lamp unit 111 and the scavenging material layer 108 are flat
Row setting, has setpoint distance between the UV lamp unit 111 and the scavenging material layer 108.Due to UV lamp unit 111
It is intervally arranged and is constituted by multiple ultraviolet lamps 106, and the purification material positioned at 111 top and bottom of UV lamp unit can be irradiated simultaneously
The bed of material 108, therefore can photocatalysis be generated on two scavenging material layers 108 simultaneously, it improves air sterillization and light is urged
The efficiency of change.
In the present embodiment, it is preferred that purification system may include multiple clean units 110, and multiple clean units 110 are parallel to be set
It sets, thus can carry out layering purification to air, increase the contact probability of air and ultraviolet lamp 106 and scavenging material layer 108, into
One step improves the clean-up effect of air.
In the present embodiment, it is preferred that glass fibre 109 extends in a first direction, and the ultraviolet lamp 106 prolongs in a second direction
It stretches, the first direction and the second direction are perpendicular.Due to the setting direction of ultraviolet lamp 106 and setting for glass fibre 109
It sets that direction is perpendicular, therefore irradiation probability of the ultraviolet lamp 106 for the photocatalyst layer 107 on glass fibre 109 can be improved,
Improve photocatalysis efficiency.
In the present embodiment, it is preferred that photocatalyst layer 107 is titanium dioxide layer.Thus, it is possible to ensure photocatalysis effect,
The materials such as zinc oxide, tin oxide can also be used in certain photocatalyst layer 107.
Embodiment three, referring to FIG. 5, on the basis of embodiment one, the purifying part is the modified polyacrylonitrile
The fibre bundle 116 that fiber is constituted, one end of fibre bundle 116 are connect with the side wall of the ventilation shaft 101, the fibre bundle 116
The other end dangle naturally, the length of the fibre bundle 116 is greater than or equal to 100 centimetres and is less than or equal to 400 centimetres.By
This, after entering air in ventilation shaft 101, the fibre bundle 116 being made of modified acrylic fibre 104 can float in air
It is dynamic, to in air little particle and oiliness particle adsorb, simultaneously as one end of fibre bundle 116 and ventilation shaft
101 side wall connects and the other end dangles naturally, therefore windage is small, and air mass flow can be improved and avoid blocking.
Example IV, referring to FIG. 4, on the basis of the various embodiments described above, ventilation shaft 101 includes 112 He of diversion section
Clean-up stage 113, between the air inlet 102 and air outlet 103, the purification system is arranged in institute the clean-up stage 113
It states in clean-up stage 113, the diversion section 112 is set between the air inlet 102 and clean-up stage 113 in the diversion section 112
There are deflector 114, the bottom of the deflector 114 to be connect with the side wall of the ventilation shaft 101, the deflector 114 is at least
Along radially extending for making the air by the diversion section 112 form eddy flow for the ventilation shaft 101.Work as ventilation shaft
When being passed through air in 101, air initially enters diversion section 112, and air forms eddy flow under the action of deflector 114, due to sky
It is poor that there are granularities between coarse granule and fine grained in gas, therefore coarse granule is draged with fine grained by centrifugal force, centripetal buoyancy, fluid
Power etc. is of different sizes, is acted on by centrifugal sedimentation, and coarse granule is detached and settled with fine grained, and then cannot be introduced into clean-up stage 113
In, to make diversion section 112 play a role in filtering air, improve the clean-up effect of air.
In the present embodiment, it is preferred that the bottom of deflector 114 is with the air inlet 102 apart from less than the deflector 114
Top and 102 distance of the air inlet, the angle of the deflector 114 and the cross section of the clean-up stage 113 is more than or waits
In 40 degree and it is less than or equal to 50 degree.It is possible thereby to improve the effect of air swirl, and then improve filter effect.
In the present embodiment, it is preferred that be equipped with metal screen 115, the metal filter between diversion section 112 and clean-up stage 113
Net 115 is arranged along the cross section of the ventilation shaft 101.Metal screen 115 can be to larger sandstone substance in air as a result,
It is stopped, prevents sandstone from entering clean-up stage 113, further improve the clean-up effect of air, and play the guarantor for equipment
Shield acts on.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that:Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement;And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of air cleaning unit, which is characterized in that including:
The first end of ventilation shaft, the ventilation shaft is air inlet, and the second end of ventilation shaft is air outlet;
Purification system is arranged in the ventilation shaft and between the air inlet and air outlet, the purification system packet
Include the purifying part made of modified acrylic fibre;
Wind turbine is arranged in the ventilation shaft, and the wind turbine will pass through the purification for air to be pumped by air inlet
Air after system is sent out by air outlet;
The ventilation shaft includes diversion section and clean-up stage, and the clean-up stage is described between the air inlet and air outlet
Purification system is arranged in the clean-up stage, and the diversion section is between the air inlet and clean-up stage, in the diversion section
Equipped with deflector, the bottom of the deflector is connect with the side wall of the ventilation shaft, and the deflector is at least along the ventilation
Pipeline is radially extended for making the air by the diversion section form eddy flow;
The bottom of the deflector is less than the top of the deflector and the air inlet distance with air inlet distance, described
Deflector and the angle of the cross section of the clean-up stage are greater than or equal to 40 degree and are less than or equal to 50 degree.
2. air cleaning unit according to claim 1, which is characterized in that the purification system further includes ultraviolet lamp and light
Catalyst layer, the ultraviolet lamp is for irradiating the photocatalyst layer.
3. air cleaning unit according to claim 2, which is characterized in that the purifying part is scavenging material layer, institute
It includes the modified acrylic fibre and glass fibre to state scavenging material layer, and the fiberglass surfacing is coated with the light and urges
Agent layer, axial direction setting of the scavenging material layer along the ventilation shaft.
4. air cleaning unit according to claim 3, it is characterised in that:
The purification system includes at least one clean unit, and the clean unit includes UV lamp unit and is located at described ultraviolet
The scavenging material layer of lamp unit top and bottom;
The UV lamp unit is intervally arranged by multiple ultraviolet lamps and is constituted, the UV lamp unit and the scavenging material layer
It is arranged in parallel, there is setpoint distance between the UV lamp unit and the scavenging material layer.
5. air cleaning unit according to claim 4, which is characterized in that the glass fibre extends in a first direction,
The ultraviolet lamp extends in a second direction, and the first direction and the second direction are perpendicular.
6. according to any air cleaning unit in claim 2-5, which is characterized in that the photocatalyst layer is dioxy
Change titanium layer.
7. air cleaning unit according to claim 1 or 2, which is characterized in that the purifying part is poly- for the modification
The fibre bundle that Dralon is constituted, one end of the fibre bundle are connect with the side wall of the ventilation shaft, the fibre bundle
The other end dangles naturally, and the length of the fibre bundle is greater than or equal to 100 centimetres and is less than or equal to 400 centimetres.
8. air cleaning unit according to claim 1, which is characterized in that be equipped with gold between the diversion section and clean-up stage
Belong to strainer, the metal screen is arranged along the cross section of the ventilation shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510873260.4A CN105371399B (en) | 2015-12-02 | 2015-12-02 | Air cleaning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510873260.4A CN105371399B (en) | 2015-12-02 | 2015-12-02 | Air cleaning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105371399A CN105371399A (en) | 2016-03-02 |
| CN105371399B true CN105371399B (en) | 2018-07-24 |
Family
ID=55373826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510873260.4A Active CN105371399B (en) | 2015-12-02 | 2015-12-02 | Air cleaning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105371399B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11213777B2 (en) | 2019-09-06 | 2022-01-04 | Imam Abdulrahman Bin Faisal University | Titanium oxide-comprising fibrous filter material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108686502A (en) * | 2018-07-20 | 2018-10-23 | 苏州方舟环保科技有限公司 | A kind of mating medical emission-control equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10328575A (en) * | 1997-06-02 | 1998-12-15 | Toyo Eremento Kogyo Kk | Air cleaning device and dust collecting electrode for the device |
| CN1232406A (en) * | 1996-08-09 | 1999-10-20 | 大金工业株式会社 | Flame-retardant filter material and air filter device using the filter material |
| CN1811021A (en) * | 2006-02-27 | 2006-08-02 | 天津工业大学 | Functional fiber and the multifunctional fiber thereof |
| EP1798204A1 (en) * | 2005-12-19 | 2007-06-20 | Kang Na Hsiung Enterprise Co., Ltd. | Fluid cleaning system and method for cleaning a fluid |
| CN101209411A (en) * | 2006-12-29 | 2008-07-02 | 田鸿彬 | Active carbon fiber with nano photocatalyst and processing method thereof |
| CN101263253A (en) * | 2004-11-30 | 2008-09-10 | 普罗佩克斯地理解决方案公司 | Flame resistant fiber blends, fire and heat barrier fabrics and related processes |
| CN102228791A (en) * | 2011-05-19 | 2011-11-02 | 哈尔滨工业大学 | Air cleaning equipment with photocatalysis unit |
-
2015
- 2015-12-02 CN CN201510873260.4A patent/CN105371399B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1232406A (en) * | 1996-08-09 | 1999-10-20 | 大金工业株式会社 | Flame-retardant filter material and air filter device using the filter material |
| JPH10328575A (en) * | 1997-06-02 | 1998-12-15 | Toyo Eremento Kogyo Kk | Air cleaning device and dust collecting electrode for the device |
| CN101263253A (en) * | 2004-11-30 | 2008-09-10 | 普罗佩克斯地理解决方案公司 | Flame resistant fiber blends, fire and heat barrier fabrics and related processes |
| EP1798204A1 (en) * | 2005-12-19 | 2007-06-20 | Kang Na Hsiung Enterprise Co., Ltd. | Fluid cleaning system and method for cleaning a fluid |
| CN1811021A (en) * | 2006-02-27 | 2006-08-02 | 天津工业大学 | Functional fiber and the multifunctional fiber thereof |
| CN101209411A (en) * | 2006-12-29 | 2008-07-02 | 田鸿彬 | Active carbon fiber with nano photocatalyst and processing method thereof |
| CN102228791A (en) * | 2011-05-19 | 2011-11-02 | 哈尔滨工业大学 | Air cleaning equipment with photocatalysis unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11213777B2 (en) | 2019-09-06 | 2022-01-04 | Imam Abdulrahman Bin Faisal University | Titanium oxide-comprising fibrous filter material |
| US11571644B2 (en) | 2019-09-06 | 2023-02-07 | Imam Abdulrahman Bin Faisal University | Cyclonic vehicular traffic pollution control system |
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| Publication number | Publication date |
|---|---|
| CN105371399A (en) | 2016-03-02 |
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Effective date of registration: 20180822 Address after: 100007 Beijing Dongcheng District Qinglong Hu Jia 1, 3, 503 room. Patentee after: Tsynya (Beijing) Environmental Technology Co. Ltd. Address before: 100010 room 002, room B1, 14 Building 33, Dongcheng District, Beijing. Patentee before: Tsynya (Beijing) marine environmental science and technology limited liability company |
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