CN105126471A - Air filter for air purifier - Google Patents

Air filter for air purifier Download PDF

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Publication number
CN105126471A
CN105126471A CN201510602699.3A CN201510602699A CN105126471A CN 105126471 A CN105126471 A CN 105126471A CN 201510602699 A CN201510602699 A CN 201510602699A CN 105126471 A CN105126471 A CN 105126471A
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China
Prior art keywords
layer
filter
air
equal
adsorption
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CN201510602699.3A
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Chinese (zh)
Inventor
丁大勇
刘小军
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Guangzhou Yonghong Electronics Co Ltd
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Guangzhou Yonghong Electronics Co Ltd
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Priority to CN201510602699.3A priority Critical patent/CN105126471A/en
Publication of CN105126471A publication Critical patent/CN105126471A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an air filter for an air purifier. The air filter comprises one or more rough filtration layers used for filtering dust particles greater than or equal to micron size, one or more adsorption layers used for removing harmful gas and one or more refined filtration layers used for filtering dust particles greater than or equal to nanometer size, wherein the rough filtration layers, adsorption layers and refined filtration layers are arranged in the air flow direction in sequence, so that dust particles greater than or equal to micron size in air are filtered by the rough filtration layers firstly, then, harmful gas in air is adopted by the adsorption layers, and finally, dust particles greater than or equal to nanometer size are filtered by the refined filtration layers; or the rough filtration layers, refined filtration layers and adsorption layers are arranged in the air flow direction in sequence, so that dust particles greater than or equal to micron size in air are filtered by the rough filtration layers firstly, then, dust particles greater than or equal to nanometer size are filtered by the refined filtration layers, and finally, harmful gas in air is adopted by the adsorption layers. According to the invention, the manner that air is filtered through combination of multi-layer filtration and various purification methods is adopted, so that air can be purified more effectively, and the service life is longer.

Description

A kind of air filter for air purifier
Technical field
The present invention relates to purification of air application technology, particularly relate to a kind of air filter for air purifier.
Background technology
China's atmosphere pollution has developed into regionality, compound pollution, and along with the development of modern industry, increasing sharply of automobile pollution, tail gas pollution, haze pollute and continue aggravation.In addition, in the car of the interior decoration of new house, new car, ornaments etc. also can give out multiple harmful gas.
Air purifier is also known as air cleaner, air cleaner, clarifier, it to adsorb, decompose or to transform various air pollutants (generally comprising the finishing pollution of PM2.5, dust, pollen, peculiar smell, formaldehyde and so on, bacterium, anaphylactogen etc.), effectively can improve the household appliances of air cleanliness, mainly be divided into family expenses, commercialization, industry, building.
Air purifier is primarily of motor, fan, air filter and intelligent monitor system composition, and the machine of part model is furnished with water tank or the auxiliary purification device of humidification function, as anion generator, high-tension circuit etc.Air filter is the core component of air purifier, and what other purifier played is only miscellaneous function, so the quality of air filter is the most critical factor directly affecting air purifier clean-up effect.
Remove technology according to air purifier for pollutants in air to classify, mainly contain mechanical filter net type, electrostatic electret filter net type, high-voltage electrostatic dust-collecting, anion and plasma method etc.And the filter screen technology of existing air purifier, its air filter adopted has plenty of single layer filter structure, and the object of this structured filter is comparatively single, such as can only dust in filtered air, and filter effect is poor, and service life is short; Some air filters only have monolayer adsorption material, such as active carbon layer, and it only can adsorb by the pernicious gas such as PARA FORMALDEHYDE PRILLS(91,95), and can not be applicable to the removal of multiple pollutant.
Summary of the invention
The object of the present invention is to provide that a kind of structure is simple, cost is low, the air filter for air purifier of good filtration effect, long service life.
Above-mentioned purpose of the present invention realizes by the following technical solutions: a kind of air filter for air purifier, it is characterized in that: it comprises for filtering the coarse filtration layer being more than or equal to micron order dust granules, for remove pernicious gas adsorption layer and for filtering the filter bed of essence being more than or equal to nanoscale dust granules, described coarse filtration layer, adsorption layer and filter bed of essence are all at least one deck, described coarse filtration layer, adsorption layer and filter bed of essence set gradually according to air flow, air is first filtered through coarse filtration layer and is more than or equal to micron order dust granules, pernicious gas is adsorbed again by adsorption layer, finally filtered by filter bed of essence and be more than or equal to nanoscale dust granules, or described coarse filtration layer, filter bed of essence and adsorption layer set gradually according to air flow, air is first filtered through coarse filtration layer and is more than or equal to micron order dust granules, filtered by filter bed of essence again and be more than or equal to nanoscale dust granules, finally adsorb pernicious gas by adsorption layer.
Described pernicious gas refers to the gas that can damage health, refers in particular to formaldehyde, carbon monoxide, sulfur dioxide and organic volatile (writing a Chinese character in simplified form: VOC, concrete title: VolatileOrganicCompounds).
The present invention adopts the mode of the combination filtered air of multiple filtration, multiple purification method, can remove the large and small granule dust in air and pernicious gas simultaneously, can more effectively purify air.Filtration of the present invention science reasonable in design, compared with existing air filter, longer service life, clean-up effect are better.In addition, structure of the present invention is simple, cost is low, can extensively promote and be suitable for.
Adsorption layer of the present invention is made up of numerous cavity and the accommodating fine granularity material with adsorption capacity in the cavities or powdered substance, and the cross section of numerous cavitys of described adsorption layer is network.Fine granularity material preferentially can select active carbon, also can select charcoal etc.
Adsorption layer of the present invention is made up of porous carrier and the chemical substance various harmful substance can being carried out harmless treatment, and this chemical substance is carried by porous carrier.This chemical substance preferred light catalyst, photocatalyst can the pollutant such as degradation of formaldehyde, benzene,toluene,xylene, ammonia, TVOC effectively, and there is the antiseptic property of high-efficiency broad spectrum, the toxin that bacterium or fungi can be discharged decomposes and harmless treatment, reach purify air, the effect of anti-soil deodorizing, thus remove the pernicious gas in air.
Adsorption layer of the present invention is by least one deck physical absorption layer and at least one layer of chemically reactive layer are composited successively according to air flow, described physical absorption layer is made up of numerous cavity and the accommodating fine granularity material with adsorption capacity in the cavities or powdered substance, the cross section of numerous cavitys of described adsorption layer is network, described chemically reactive layer is by carrying out with pernicious gas the chemical substance that reacts to each other and the porous carrier for carrying chemical substance forms, described reacting to each other comprises chemical reaction and chemical catalysis effect, residue after pernicious gas and chemical substance react to each other adsorbs on porous support, or be broken down into innocuous gas and distribute, thus removal pernicious gas.
Physical absorption layer of the present invention adopts active carbon layer, and described chemically reactive layer adopts photocatalyst layer.
Coarse filtration layer of the present invention adopts the material of compressible distortion, and this material has filter mesh, and the aperture of filter mesh is grade or micron order in its natural state, and filter mesh is contracted to and is equal to or less than micron order under compression; Or described coarse filtration layer is composited more than two-layer, the aperture of the filter mesh of every layer is grade or micron order, and two-layer on filter mesh to stagger formation filter bores, the aperture of this filter bores is equal to or less than micron order, can stop to be more than or equal to micron-sized dust granules and to pass through.Coarse filtration layer can form by low by resistance, that air quantity is large, dust containing capacity is high reticular substance, and the aperture of the filter mesh of coarse filtration layer is relatively large, and large dust granules can be stoped to pass through.
Filter bed of essence of the present invention adopts the material of compressible distortion, and this material has filter mesh, and the aperture of filter mesh is micron order or nanoscale in its natural state, and filter mesh is contracted to and is equal to or less than nanoscale under compression; Or described filter bed of essence is composited more than two-layer, the aperture of the filter mesh of every layer is micron order or nanoscale, and two-layer on filter mesh to stagger formation filter bores, the aperture of this filter bores is equal to or less than nanoscale, can stop to be more than or equal to nano level dust granules and to pass through.
The filter mesh of same size rank and dust granules, dust granules is trapped on coarse filtration layer and filter bed of essence by Electrostatic Absorption or adherent fashion.
Each grid that the present invention forms described network is square, rectangle, triangle, polygon, circle, ellipse, parallelogram or irregularly shaped.
Coarse filtration layer of the present invention, adsorption layer and filter bed of essence are integrally fixed jointly by housing.Therefore, coarse filtration layer, adsorption layer and filter bed of essence can integral replacings, single use, and it is convenient, simple to operate to change.
Compared with prior art, the present invention has following significant effect:
(1) the present invention adopts the mode of the combination filtered air of multiple filtration, multiple purification method, can remove the large and small granule dust in air and pernicious gas simultaneously, can more effectively purify air.
(2) filtration of the present invention science reasonable in design, compared with existing air filter, longer service life, clean-up effect are better.
(3) each layer is integrally fixed jointly by housing, entire package, integral replacing, and single use is simple to operate, easy to use.
(4) structure of the present invention is simple, cost is low, can extensively promote and be suitable for.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is structural blast schematic diagram of the present invention;
Fig. 2 is one of schematic cross section of adsorption layer of the present invention (grid is square);
Fig. 3 is the schematic cross section two (grid is rectangle) of adsorption layer of the present invention;
Fig. 4 is the schematic cross section three (grid is polygon) of adsorption layer of the present invention;
Fig. 5 is the schematic cross section four (grid is triangle) of adsorption layer of the present invention;
Fig. 6 is the schematic cross section five (grid is for circular) of adsorption layer of the present invention;
Fig. 7 is the schematic cross section six (grid is for oval) of adsorption layer of the present invention;
Fig. 8 is one of operation principle block diagram of two kinds of embodiments of the present invention;
Fig. 9 is the operation principle block diagram two of two kinds of embodiments of the present invention.
Detailed description of the invention
As Fig. 1, shown in 8 and 9, it is a kind of air filter for air purifier of the present invention, it is primarily of for filtering the coarse filtration layer 1 being more than or equal to micron order dust granules, for removing the adsorption layer 2 of pernicious gas and being composited for filtering the filter bed of essence 3 being more than or equal to nanoscale dust granules, coarse filtration layer 1, adsorption layer 2 and filter bed of essence 3 are 1 ~ N layer, in the present embodiment, coarse filtration layer 1, adsorption layer 2 and filter bed of essence 3 flow to according to air A and set gradually, air A is first filtered through coarse filtration layer 1 and is more than or equal to micron order dust granules, pernicious gas is adsorbed again by adsorption layer 2, finally filtered by filter bed of essence 3 and be more than or equal to nanoscale dust granules.
In the present embodiment, the number of plies N of adsorption layer 2 is 2, namely adsorption layer 2 adopts two-layer, wherein one deck is physical absorption layer, physical absorption layer adopts active carbon layer, physical absorption layer is made up of numerous cavity and the accommodating fine granularity material with adsorption capacity in the cavities or powdered substance, and fine granularity material preferentially can select active carbon, also can select charcoal etc.Numerous cavity specifically adopts plastic honeycomb; 11mm is thick, dress ∮ 2.0 grain active carbon, and activated carbon weight is 30 ± 2g; black is pasted on surface can special cloth bound cover; Φ 2.0 grain active carbon characteristic: the blue decolorizing ability of subunit is 105mg/g, and iodine number is 850mg/g, and pH value is 7%; moisture content is lower than 5%; ash content is 11%, and intensity is 95%, and carbon tetrachloride adsorption rate is more than 32%.One deck is chemically reactive layer in addition, chemically reactive layer is by carrying out with pernicious gas the chemical substance that reacts to each other and the porous carrier for carrying chemical substance forms, react to each other and comprise chemical reaction and chemical catalysis effect, residue after pernicious gas and chemical substance react to each other adsorbs on porous support, or be broken down into innocuous gas and distribute, thus remove pernicious gas.In the present embodiment, chemically reactive layer adopts photocatalyst layer, chemical substance specifically adopts photocatalyst, porous carrier is net cotton, namely 35PPI nets cotton photocatalyst, 5MM is thick, photocatalyst filter medium characteristic: the harmful organic substance affecting human body health for formaldehyde, benzene, ammonia, sulfur dioxide, carbon monoxide, nitrogen oxide etc. plays catharsis.
As shown in Fig. 2 ~ 7, the cross section of numerous cavitys of adsorption layer 2 is network, and each grid of composition network is square, rectangle, triangle, polygon, circle, ellipse or parallelogram, and other also can be adopted irregularly shaped.
Coarse filtration layer 1 adopts the material of compressible distortion, and this material has filter mesh, and the aperture of filter mesh is grade or micron order in its natural state, and filter mesh is contracted to and is equal to or less than micron order under compression; Or coarse filtration layer is composited more than two-layer, the aperture of the filter mesh of every layer is grade or micron order, the formation filter bores and the filter mesh on every layer staggers, the aperture of this filter bores is equal to or less than micron order, is equal to or greater than micron order dust granules passes through to stop.
In the present embodiment, coarse filtration layer 1 is specifically selected and is just imitated cotton, based in filtered atmospheric >=5 μm of particle dust and suspension, 3MM is thick.The cotton characteristic of first effect: resistance is low, air quantity is large, dust containing capacity up to 350g/m2, coarse filtration layer can form by low by resistance, that air quantity is large, dust containing capacity is high reticular substance, and the aperture of the filter mesh of coarse filtration layer is relatively large, and large dust granules can be stoped to pass through.
Filter bed of essence 3 adopts the material of compressible distortion, and this material has filter mesh, and the aperture of filter mesh is micron order or nanoscale in its natural state, and filter mesh is contracted to and is equal to or less than nanoscale under compression; Or filter bed of essence is composited more than two-layer, the aperture of the filter mesh of every layer is micron order or nanoscale, the formation filter bores and the filter mesh on every layer staggers, the aperture of this filter bores is equal to or less than nanoscale, is more than or equal to nano level dust granules passes through to stop.
In the present embodiment, filter bed of essence 3 specifically selects HEPA, is mainly used in trapping the particle dust of below 0.5um and various suspension.Filter core is 100g/m2PP filter paper, rolls over high 9mm, tooth pitch 3.5-3.8mm, and glue apart from 25mm, two-sidedly plays glue.HEPA filter material (100g/m2PP filter paper) performance: than speed 0.06 liter/min. under centimetre 2 conditions, windage 35Pa, 0.3um filter efficiency more than 97%.
Use housing coarse filtration layer 1, adsorption layer 2 and filter bed of essence 3 to be jointly integrally fixed, housing specifically adopts the black paperboard frame of 400g, without sealing strip, without handle.Coarse filtration layer, adsorption layer and filter bed of essence can entirety be changed, single use, and it is convenient, simple to operate to change.
Performance of the present invention: be (1) 0.06 liter/min centimetre at air quantity 2under condition, atmospheric dust arresting efficiency more than 97%; (2) adsorbable various pernicious gas, as pernicious gases such as formaldehyde, benzene, dimethylbenzene, toluene, TVOC.
In another embodiment, coarse filtration layer, filter bed of essence and adsorption layer set gradually according to air flow, air is first filtered through coarse filtration layer and is more than or equal to micron order dust granules, filtered by filter bed of essence again and be more than or equal to nanoscale dust granules, finally adsorb pernicious gas by adsorption layer, see Fig. 8 and 9.
In other embodiments, adsorption layer is at least one deck, and adsorption layer is made up of numerous cavity and the accommodating fine granularity material with adsorption capacity in the cavities or powdered substance, and the cross section of numerous cavitys of adsorption layer is network, or adsorption layer is made up of porous carrier and the chemical substance that various harmful substance can be carried out harmless treatment, and this chemical substance is carried by porous carrier, carrying can be chemical substance is coated in porous carrier surface or blend together one with porous carrier, or adsorption layer is by least one deck physical absorption layer and at least one layer of chemically reactive layer are composited successively according to air flow, physical absorption layer is made up of numerous cavity and the accommodating fine granularity material with adsorption capacity in the cavities or powdered substance, the cross section of numerous cavitys of adsorption layer is network, chemically reactive layer is by carrying out with pernicious gas the chemical substance that reacts to each other and the porous carrier for carrying chemical substance forms, react to each other and comprise chemical reaction and chemical catalysis effect, residue after pernicious gas and chemical substance react to each other adsorbs on porous support, or be broken down into innocuous gas and distribute, thus removal pernicious gas.
Embodiments of the present invention are not limited thereto, according to foregoing of the present invention, according to ordinary technical knowledge and the customary means of this area, do not departing under the present invention's above-mentioned basic fundamental thought prerequisite, coarse filtration layer of the present invention, adsorption layer and the structure and material selected by filter bed of essence can be determined according to actual conditions, and simultaneously the quantity of each layer and concrete set-up mode also can be selected according to the effect that will realize.Therefore, the present invention can also make the amendment of other various ways, replacement or change, all drops within rights protection scope of the present invention.

Claims (9)

1. the air filter for air purifier, it is characterized in that: it comprises for filtering the coarse filtration layer being more than or equal to micron order dust granules, for remove pernicious gas adsorption layer and for filtering the filter bed of essence being more than or equal to nanoscale dust granules, described coarse filtration layer, adsorption layer and filter bed of essence are all at least one deck, described coarse filtration layer, adsorption layer and filter bed of essence set gradually according to air flow, air is first filtered through coarse filtration layer and is more than or equal to micron order dust granules, pernicious gas is adsorbed again by adsorption layer, finally filtered by filter bed of essence and be more than or equal to nanoscale dust granules, or described coarse filtration layer, filter bed of essence and adsorption layer set gradually according to air flow, air is first filtered through coarse filtration layer and is more than or equal to micron order dust granules, filtered by filter bed of essence again and be more than or equal to nanoscale dust granules, finally adsorb pernicious gas by adsorption layer.
2. the air filter for air purifier according to claim 1, it is characterized in that: described adsorption layer is made up of numerous cavity and the accommodating fine granularity material with adsorption capacity in the cavities or powdered substance, and the cross section of numerous cavitys of described adsorption layer is network.
3. the air filter for air purifier according to claim 1, is characterized in that: described adsorption layer is made up of porous carrier and the chemical substance various harmful substance can being carried out harmless treatment, and this chemical substance is carried by porous carrier.
4. the air filter for air purifier according to claim 1, it is characterized in that: described adsorption layer is by least one deck physical absorption layer and at least one layer of chemically reactive layer are composited successively according to air flow, described physical absorption layer is made up of numerous cavity and the accommodating fine granularity material with adsorption capacity in the cavities or powdered substance, the cross section of numerous cavitys of described adsorption layer is network, described chemically reactive layer is by carrying out with pernicious gas the chemical substance that reacts to each other and the porous carrier for carrying chemical substance forms, described reacting to each other comprises chemical reaction and chemical catalysis effect, residue after pernicious gas and described chemical substance react to each other adsorbs on porous support, or be broken down into innocuous gas and distribute, thus removal pernicious gas.
5. the air filter for air purifier according to claim 4, is characterized in that: described physical absorption layer adopts active carbon layer, and described chemically reactive layer adopts photocatalyst layer.
6. the air filter for air purifier according to any one of claim 2 ~ 5, it is characterized in that: described coarse filtration layer adopts the material of compressible distortion, this material has filter mesh, the aperture of filter mesh is grade or micron order in its natural state, and filter mesh is contracted to and is equal to or less than micron order under compression; Or described coarse filtration layer is composited more than two-layer, the aperture of the filter mesh of every layer is grade or micron order, the formation filter bores and the filter mesh on every layer staggers, the aperture of this filter bores is equal to or less than micron order, is more than or equal to micron order dust granules passes through to stop.
7. the air filter for air purifier according to claim 6, it is characterized in that: described filter bed of essence adopts the material of compressible distortion, this material has filter mesh, the aperture of filter mesh is micron order or nanoscale in its natural state, and filter mesh is contracted to and is equal to or less than nanoscale under compression; Or described filter bed of essence is composited more than two-layer, the aperture of the filter mesh of every layer is micron order or nanoscale, the formation filter bores and the filter mesh on every layer staggers, the aperture of this filter bores is equal to or less than nanoscale, is more than or equal to nano level dust granules passes through to stop.
8. the air filter for air purifier according to claim 7, is characterized in that: each grid forming described network is square, rectangle, triangle, polygon, circle, ellipse, parallelogram or irregularly shaped.
9. the air filter for air purifier according to claim 8, is characterized in that: described coarse filtration layer, adsorption layer and filter bed of essence are integrally fixed jointly by housing.
CN201510602699.3A 2015-09-18 2015-09-18 Air filter for air purifier Pending CN105126471A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105650753A (en) * 2016-01-27 2016-06-08 蚌埠市瑞风净化设备工程有限责任公司 Humidifying air purification equipment
CN105817087A (en) * 2016-05-11 2016-08-03 苏州甫电子科技有限公司 Composite type air purification filter element with multilayered structure
CN105823148A (en) * 2016-03-30 2016-08-03 宁波艾克威特智能科技有限公司 Heavy metal resisting type filtering device used for air cleaner, and installing and using method thereof
CN106091124A (en) * 2016-07-27 2016-11-09 赣州安宏环保科技有限公司 Eliminate the air-conditioning device of air pollution
CN106091343A (en) * 2016-05-28 2016-11-09 赣州安宏环保科技有限公司 Stacking dish dress nanometer colloid hydrogel air depurator
CN106565048A (en) * 2016-11-07 2017-04-19 四会市恒星智能科技有限公司 Water purification equipment capable of purifying air
CN108692418A (en) * 2018-04-20 2018-10-23 温州大学激光与光电智能制造研究院 Intelligent dedusting ventilating system
CN109304068A (en) * 2018-06-21 2019-02-05 昆山市帝源环保设备有限公司 Complicated pollutant air purification structure
CN110614032A (en) * 2019-09-26 2019-12-27 成都易态科技有限公司 Preparation method of filter material
CN110651718A (en) * 2019-08-27 2020-01-07 中国中元国际工程有限公司 Animal room air conditioning system with indoor air purification device
CN111744875A (en) * 2020-07-07 2020-10-09 张小平 A raw and other materials cleaning system for traditional chinese medicine processing production

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Publication number Priority date Publication date Assignee Title
JP2002369868A (en) * 2001-06-15 2002-12-24 Yoshiki Matsui Air purifier
CN103968462A (en) * 2014-05-25 2014-08-06 洛阳市睿仕行智能科技发展有限公司 Composite multifunctional device for air activation, dust removal, sterilization and filtering
CN205073798U (en) * 2015-09-18 2016-03-09 广州市永泓电子有限公司 A air filter for air purifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002369868A (en) * 2001-06-15 2002-12-24 Yoshiki Matsui Air purifier
CN103968462A (en) * 2014-05-25 2014-08-06 洛阳市睿仕行智能科技发展有限公司 Composite multifunctional device for air activation, dust removal, sterilization and filtering
CN205073798U (en) * 2015-09-18 2016-03-09 广州市永泓电子有限公司 A air filter for air purifier

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105650753A (en) * 2016-01-27 2016-06-08 蚌埠市瑞风净化设备工程有限责任公司 Humidifying air purification equipment
CN105823148A (en) * 2016-03-30 2016-08-03 宁波艾克威特智能科技有限公司 Heavy metal resisting type filtering device used for air cleaner, and installing and using method thereof
CN105817087A (en) * 2016-05-11 2016-08-03 苏州甫电子科技有限公司 Composite type air purification filter element with multilayered structure
CN106091343A (en) * 2016-05-28 2016-11-09 赣州安宏环保科技有限公司 Stacking dish dress nanometer colloid hydrogel air depurator
CN106091124A (en) * 2016-07-27 2016-11-09 赣州安宏环保科技有限公司 Eliminate the air-conditioning device of air pollution
CN106565048A (en) * 2016-11-07 2017-04-19 四会市恒星智能科技有限公司 Water purification equipment capable of purifying air
CN108692418A (en) * 2018-04-20 2018-10-23 温州大学激光与光电智能制造研究院 Intelligent dedusting ventilating system
CN109304068A (en) * 2018-06-21 2019-02-05 昆山市帝源环保设备有限公司 Complicated pollutant air purification structure
CN110651718A (en) * 2019-08-27 2020-01-07 中国中元国际工程有限公司 Animal room air conditioning system with indoor air purification device
CN110614032A (en) * 2019-09-26 2019-12-27 成都易态科技有限公司 Preparation method of filter material
CN111744875A (en) * 2020-07-07 2020-10-09 张小平 A raw and other materials cleaning system for traditional chinese medicine processing production

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Application publication date: 20151209