CN210921638U - Medical air sterilizing purifier - Google Patents
Medical air sterilizing purifier Download PDFInfo
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- CN210921638U CN210921638U CN201921481129.3U CN201921481129U CN210921638U CN 210921638 U CN210921638 U CN 210921638U CN 201921481129 U CN201921481129 U CN 201921481129U CN 210921638 U CN210921638 U CN 210921638U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model discloses a medical air disinfection purifier, it includes: an air flow channel is arranged between the air inlet and the air outlet; a first filter layer transversely disposed within the airflow passage; a centrifugal fan disposed downstream of the first filter layer; and a photocatalytic filter layer, which is arranged at the downstream of the centrifugal fan, the photocatalytic filter layer is detachably connected in the airflow channel, the photocatalytic filter layer is composed of a plurality of photocatalytic units which are obliquely arranged, and each photocatalytic unit comprises: a catalyst plate which is a foamed ceramic plate loaded with a photocatalytic active component; and the two grating lamp panels are respectively arranged on two sides of the catalytic plate in parallel, a plurality of ultraviolet LED light sources are uniformly distributed on the grating strips of the grating lamp panels, and the ultraviolet LED light sources irradiate the catalytic plate. The utility model discloses a photocatalysis unit slope sets up, and the air current of admitting air can form the vortex in the through-hole department of foam ceramic plate, strengthens gaseous and catalyst contact, realizes disinfecting in real time among the medical environment.
Description
Technical Field
The utility model relates to a disinfecting equipment field, in particular to medical air disinfection purifier.
Background
In the hospital environment, bacteria and viruses are present in large quantities, especially during periods of high infectious disease, which poses a very high risk of infection/secondary infection for both healthcare workers and patients. Generally, in the prior art, hospitals adopt ultraviolet and ozone disinfection treatment for wards, consulting rooms and the like, however, people need to be evacuated in the disinfection process. On one hand, real-time disinfection and sterilization cannot be realized, and on the other hand, the disinfection and sterilization is time-consuming and low in efficiency.
In recent years, the photocatalytic purification technology has the advantages of moderate reaction conditions, good stability of the catalyst, spectrum sterilization and disinfection and the like because oxygen in the air is directly used as an oxidant, so that the photocatalytic purification technology becomes an environmental pollution treatment technology with good application prospect. TiO 22Has good anti-light corrosion and catalytic activity, stable performance, low price, easy obtaining, no toxicity and no harm, and is the best light recognized at presentA catalyst.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an air disinfection clarifier, environment such as specially adapted hospital and welfare institute to can disinfect to the room air in real time, and do not influence the indoor personnel and carry out medical care work.
In order to achieve the above object, the utility model provides a medical air disinfection purifier, it includes: the bottom of the shell is provided with an air inlet, the top of the shell is provided with an air outlet, and an airflow channel is arranged between the air inlet and the air outlet; a first filter layer transversely disposed within the airflow passage; a centrifugal fan disposed downstream of the first filter layer; and a photocatalytic filter layer, which is arranged at the downstream of the centrifugal fan, the photocatalytic filter layer is detachably connected in the airflow channel, the photocatalytic filter layer is composed of a plurality of photocatalytic units which are obliquely arranged, and each photocatalytic unit comprises: a catalyst plate which is a foamed ceramic plate loaded with a photocatalytic active component; and the two grating lamp panels are respectively arranged on two sides of the catalytic plate in parallel, a plurality of ultraviolet LED light sources are uniformly distributed on the grating strips of the grating lamp panels, and the ultraviolet LED light sources irradiate the catalytic plate.
Further, in the above technical scheme, the plurality of photocatalytic units are arranged in a V-shape or an inverted V-shape.
Further, in the above technical solution, an included angle between the photocatalytic unit and the horizontal direction is 20 ° to 80 °, and preferably 30 ° to 65 °.
Further, in the above technical scheme, the centrifugal fan is a circular pipeline fan; the outlet of the centrifugal fan is provided with a contraction section; the centrifugal fan is provided with a sound absorption material layer.
Furthermore, in the above technical scheme, the air inlet is arranged on the side surface and the bottom surface of the bottom of the shell, and the sum of the areas of the air inlet is greater than or equal to the sectional area of the airflow channel; the air outlet is arranged on the side surface and/or the top surface of the top of the shell.
Further, in the technical scheme, the aperture ratio of the foamed ceramic plate is 70-90%, the pore density is 8-60 ppi, and the photocatalytic activity component is nano titanium dioxide.
Further, in the above technical scheme, the ultraviolet LED light source is a UVA band LED light source.
Further, in the above technical scheme, the wavelength of the ultraviolet LED light source is 365 nm.
Further, among the above-mentioned technical scheme, medical air disinfection clarifier still includes: a second filter layer disposed laterally downstream of the photocatalytic filter layer; and a negative oxygen ion material layer disposed on top of the housing. Wherein, the first filter layer is coarse filter screen and medium efficiency filter screen, and the second filter layer is the HEPA filter screen.
Further, in the above technical scheme, the housing is made of an antibacterial stainless steel material; the bottom of the shell is provided with a travelling wheel; the photocatalysis filter layer and the centrifugal fan are respectively installed in the shell in a modularized way.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the photocatalytic filter layer formed by the inclined arrangement of the photocatalytic units greatly increases the air passing area on the unit section, reduces the wind resistance and improves the filtering efficiency; the photocatalysis unit is obliquely arranged, the air flow of the inlet air can form vortex at the through hole of the foam ceramic plate loaded with the photocatalysis active component, so that the contact of the gas and the catalyst is strengthened, the real-time disinfection and sterilization in the medical environment are realized, and people do not need to be evacuated.
2. The centrifugal fan can meet the requirement of air pressure under a certain air quantity, so that the centrifugal fan can be suitable for assembling a plurality of layers of filter screens and filter units, and the purification efficiency is improved; meanwhile, the overall noise is reduced, and the requirement of low noise in a medical environment is met.
3. The air inlet is arranged on the bottom surface and the side surface to increase the air inlet area, and the air exchange effect is better.
4. The photocatalysis filter layer is arranged in a detachable mode, even can be installed in a modularized mode, is convenient to maintain and replace, and each photocatalysis unit can be replaced independently, so that the maintenance cost is reduced.
5. The shell made of the antibacterial stainless steel material is suitable for medical environment, and the service life of the whole machine is prolonged.
6. Improve the mobility through setting up the walking wheel, can conveniently according to the disinfection needs with the utility model discloses a suitable position such as ward, consulting room is placed to the clarifier.
7. The ultraviolet LED light source of UVA wave band is adopted to the photocatalysis unit, can not cause the burn to human skin, can not produce ozone, reduces the electric energy waste that the low efficiency wave band leads to.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means more comprehensible, and to make the above and other objects, technical features, and advantages of the present invention easier to understand, one or more preferred embodiments are listed below, and the following detailed description is given with reference to the accompanying drawings.
Drawings
Fig. 1 is a perspective view of a medical air sterilizer according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a medical air sterilizer according to an embodiment of the present invention.
Fig. 3 is a schematic perspective exploded view of a medical air sterilizer according to an embodiment of the present invention, in which a first filter layer and a second filter layer are hidden.
Description of the main reference numerals:
10-shell, 11-air inlet, 12-air outlet, 13-control panel, 21-first filter layer, 22-photocatalytic filter layer, 220-photocatalytic unit, 221-catalytic plate, 222-grating lamp panel, 23-centrifugal fan, 231-contraction section, 24-second filter layer, 25-negative oxygen ion material layer and 30-travelling wheel.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.
As shown in fig. 1 to 3, the medical air sterilization purifier according to the embodiment of the present invention is used in a room of a medical environment, such as a ward, a doctor's office, or a welfare hospital. The utility model discloses a medical air disinfection purifier includes casing 10, and casing 10's bottom is equipped with air intake 11, and the top is equipped with air outlet 12. An air flow passage in the housing 10 penetrates between the air inlet 11 and the air outlet 12. The air flow channel is provided with a centrifugal fan 23 for drawing air in from the air inlet 11 and discharging air from the air outlet 12. Indoor air containing bacteria, viruses and the like enters the airflow channel from the air inlet 11, pollutants such as dust, particles and the like are filtered through the first filter layer 21, then the air is sterilized and disinfected through the photocatalytic filter layer 22, VOCs, peculiar smell and the like are removed, and the filtered clean air returns to the room from the air outlet 12 to form circulation purification of the indoor air. Preferably, the first filter layer 21 and the photocatalytic filter layer 22 are detachably connected to the airflow channel, so that maintenance and replacement are facilitated. More preferably, in one or more embodiments of the present invention, the centrifugal fan 23 and the photocatalytic filter layer 22 may be assembled with the housing in a modular installation manner, for example, a drawer-type insertion and extraction manner (see fig. 3).
Preferably, but not limitatively, in one or more embodiments of the present invention, the centrifugal fan 23 may be a circular duct fan. In order to increase the wind pressure, especially the micro wind pressure, the outlet of the centrifugal fan 23 is further provided with a contraction section 231. A layer of sound absorbing material (not shown), such as ESP foam or EVA sponge, may be provided within the housing of the centrifugal fan 23 to meet low noise requirements in a medical environment.
Preferably, but not limitatively, the medical air disinfection purifier of the present invention may also be provided with a second filter layer 24, which is disposed transversely downstream of the photocatalytic filter layer. Illustratively, the first filter layer 21 may include a plurality of filters, for example, a coarse filter and a medium filter, and the first filter layer 21 may filter out dust, particles, PM10, and other contaminants. The second filter layer 24 can be a HEPA filter screen to filter pollutants such as PM2.5, and realize better filter effect through stage filtration. Preferably, but not limitatively, a negative oxygen ion material layer 25 may be disposed near the air outlet 12, for example, the negative oxygen ion material layer 25 is disposed in the interlayer of the air outlet 12, so as to increase the concentration of negative oxygen ions in the exhaust gas and improve the air environment. Illustratively, the negative oxygen ion material layer 25 may be a passive negative oxygen ion material with a honeycomb ceramic as a carrier and a semiconductor material mixed.
Further, in one or more embodiments of the present invention, the photocatalytic filter layer 22 is formed by arranging a plurality of photocatalytic units 220 in an inclined manner. Illustratively, the photocatalytic units 220 may be arranged in a V-shape or an inverted V-shape. It should be understood that the illustrated arrangements are exemplary only and are not to be construed as limiting the invention. Preferably, the photocatalytic unit 220 has an angle of 20 ° to 80 °, preferably 30 ° to 65 °, with the horizontal direction. Each photocatalytic unit 220 includes a catalyst plate 221 and two louver lamp plates 222. The catalytic plate 221 is a foam ceramic plate loaded with a photocatalytic active component, and the two grating lamp panels 222 are respectively arranged on two sides of the catalytic plate 221 in parallel. A plurality of ultraviolet LED light sources (not shown in the figure) are uniformly distributed on the grid bars of the grid lamp panel 222, and all of the ultraviolet LED light sources illuminate the catalytic plate 221. In the utility model, each photocatalytic unit 220 is obliquely arranged, on one hand, the material air passing area on the unit cross section is increased, and the wind resistance is reduced; on the other hand, the catalyst carrier foamed ceramic plate in the photocatalytic unit 220 has a porous structure, and under the condition of oblique air inlet, airflow forms vortex on the surface of the catalyst, so that the contact between the gas and the catalyst is strengthened; in addition, the tilted photocatalytic unit 220 can redistribute the gas in the gas flow channel. Each of the photocatalytic units 220 can be individually installed and removed, which makes it possible to individually replace only a defective photocatalytic unit without replacing the entire photocatalytic filter layer when one of the photocatalytic units 220 is defective and needs to be replaced.
Preferably, but not limitatively, in one or more exemplary embodiments of the present invention, both the side and bottom surfaces of the bottom of the housing 10 are provided with the air inlet 11, and the side and/or top surface of the top of the housing 10 is provided with the air outlet 12. The sum of the areas of the air inlets 11 is larger than or equal to the sectional area of the airflow channel. Illustratively, the outlet 12 of the top surface of the housing 10 may be a mesh.
In one or more exemplary embodiments of the present invention, the catalytic plate 221 (foamed ceramic plate) has an open cell ratio of 70% to 90% and a cell density of 8 to 60 ppi; the photocatalytically active component supported by the catalytic plate 221 is preferably nano titanium dioxide.
In one or more exemplary embodiments of the present invention, the ultraviolet LED light source is preferably a point light source. Illustratively, the ultraviolet LED light source is preferably in the UVA band, and more preferably, the wavelength of the ultraviolet LED light source is 365 nm. The ultraviolet LED light source with UVA wave band can not burn human skin, can not generate ozone, and provides the photocatalyst with the most suitable wavelength of energy. The single wavelength is beneficial to improving the photoelectric conversion efficiency, and the electric energy waste caused by extra low-efficiency wave bands can be avoided.
Preferably, but not limitatively, in one or more exemplary embodiments of the present invention, a control panel 13 is provided on the housing 10, and the control panel 13 can control the centrifugal fan 23 and the plurality of ultraviolet LED light sources. Preferably, but not limitatively, the housing 10 may be provided with a PM2.5 sensor and a VOCs sensor (not shown in the figure) to detect values such as PM2.5 concentration and VOCs concentration of the air, so as to control or adjust the operation of the medical air disinfection purifier of the present invention.
Preferably, but not limitatively, in one or more exemplary embodiments of the present invention, the bottom of the housing 10 is provided with a plurality of traveling wheels 30, which facilitate movement of the medical air sterilization purifier of the present invention. Preferably, the road wheels 30 may be universal wheels. The shell 10 can be made of antibacterial stainless steel, and meets the use requirement of medical environment.
Adopt the utility model discloses a medical air disinfection purifier can be to area 60 ~ 120m2The indoor environment is subjected to efficient circulating disinfection and purification treatment, so that the indoor air quality meets the national standard, and the medical environment of medical workers and patients is improved. In addition, compare the photocatalysis filter layer of perpendicular air inlet and parallel air inlet, the utility model discloses a photocatalysis filter layer of slant air inlet's the efficiency improvement of air exchange volume improvement and/or getting rid of the bacterium virus.
Example 1
At 30m3The standard test chamber in detect the sterilization effect of the medical air disinfection purifier on the staphylococcus albus. The cross-sectional area of the airflow channel of the air disinfection purifier for traditional Chinese medicine is 0.08m2The air passing area of the photocatalytic unit is 0.18m2The photocatalytic units are arranged in a V shape (oblique air inlet), the included angle between the photocatalytic units and the horizontal direction is 64 degrees, and the air volume of the centrifugal fan is 1450m3H is used as the reference value. The ventilation rate is 1000m3And h, the sterilization rate of the staphylococcus albus reaches more than 99.9 percent after the operation for 1 hour.
Comparative example 1
At 30m3The comparison example is tested in a standard test chamberThe cross-sectional area of the airflow channel of the air disinfection purifier for traditional Chinese medicine is 0.09m2The photocatalytic unit is transversely arranged (vertical air inlet), and the air passing area of the photocatalytic unit is 0.09m2The air volume of the centrifugal fan is 1450m3H is used as the reference value. The ventilation rate is 800m3The sterilization rate of staphylococcus albus after 1 hour of operation is 98.8%.
Comparative example 2
At 30m3The standard test chamber of the air disinfection purifier detects the sterilization effect of the comparative example on staphylococcus albus, and the sectional area of the airflow channel of the air disinfection purifier for traditional Chinese medicine is 0.06m2The photocatalytic unit is arranged along the axial direction of the airflow channel (parallel air inlet), and the air quantity of the centrifugal fan is 1450m3H is used as the reference value. The ventilation rate is 1200m3The sterilization rate of staphylococcus albus after 1 hour of operation is 38.6%.
Example 2
At 30m3The standard test chamber in detect the utility model discloses a medical air disinfection clarifier is to the virus killing effect of H3N2 virus. The cross-sectional area of the airflow channel of the air disinfection purifier for traditional Chinese medicine is 0.08m2The photocatalytic units are arranged in a V shape (oblique air inlet), the included angle between the photocatalytic units and the horizontal direction is 64 degrees, and the air passing area of the photocatalytic units is 0.18m2The air volume of the centrifugal fan is 1450m3H is used as the reference value. The ventilation rate is 1000m3The removal rate of H3N2 virus after 1 hour of operation is more than 99%.
Comparative example 3
At 30m3The standard test chamber of (1) detects the antivirus effect of the comparative example on the H3N2 virus, and the sectional area of the airflow channel of the air disinfection purifier for the traditional Chinese medicine is 0.09m2The photocatalytic unit is transversely arranged (vertical air inlet), and the air passing area of the photocatalytic unit is 0.09m2The air volume of the centrifugal fan is 1450m3H is used as the reference value. The ventilation rate is 800m3The removal rate of H3N2 virus after 1 hour of operation was 97%.
Comparative example 4
At 30m3The control example was tested for its virucidal effect against H3N2 virus in a standard test chamberAccording to the comparative example, the sectional area of the airflow channel of the air disinfection purifier for traditional Chinese medicine is 0.06m2The photocatalytic unit is arranged along the axial direction of the airflow channel (parallel air inlet), and the air quantity of the centrifugal fan is 1450m3H is used as the reference value. The ventilation rate is 1200m3The removal rate of H3N2 virus after 1 hour of operation was 33.4%.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.
Claims (10)
1. A medical air disinfection purifier, characterized by comprising:
the bottom of the shell is provided with an air inlet, the top of the shell is provided with an air outlet, and an airflow channel is arranged between the air inlet and the air outlet;
a first filter layer disposed laterally within the airflow passage;
a centrifugal fan disposed downstream of the first filter layer; and
the photocatalysis filter layer, it sets up centrifugal fan's low reaches, photocatalysis filter layer detachably connects in the air current passageway, the photocatalysis filter layer comprises a plurality of photocatalysis units that the slope set up, every the photocatalysis unit includes:
a catalyst plate which is a foamed ceramic plate loaded with a photocatalytic active component; and
two grid lamp plates, it is parallel arrangement respectively is in the both sides of catalysis board, evenly distributed has a plurality of ultraviolet LED light sources on the grid of grid lamp plate, a plurality of ultraviolet LED light sources shine to the catalysis board.
2. The medical air sterilizer of claim 1, wherein the plurality of photocatalytic units are arranged in a V-shape or an inverted V-shape.
3. The medical air sterilizer of claim 1, wherein the angle between the photocatalytic unit and the horizontal direction is 20 ° to 80 °.
4. The medical air sterilizer of claim 1, wherein the centrifugal fan is a circular duct fan; the outlet of the centrifugal fan is provided with a contraction section; the centrifugal fan is provided with a sound absorption material layer.
5. The medical air sterilizing purifier as recited in claim 1, wherein the air inlet is disposed on the side surface and the bottom surface of the bottom of the housing, and the sum of the areas of the air inlet is greater than or equal to the cross-sectional area of the air flow channel; the air outlet is arranged on the side face and/or the top face of the top of the shell.
6. The medical air sterilization purifier as claimed in claim 1, wherein the foamed ceramic plate has an open porosity of 70-90%, a pore density of 8-60 ppi, and the photocatalytic active component is nano titanium dioxide.
7. The medical air sterilizer of claim 1, wherein the ultraviolet LED light source is a UVA band LED light source.
8. The medical air sterilizer of claim 7, wherein the wavelength of the ultraviolet LED light source is 365 nm.
9. The medical air sterilizer of claim 1, further comprising:
a second filter layer disposed laterally downstream of the photocatalytic filter layer; and
a layer of negative oxygen ion material disposed on top of the housing,
the first filter layer is a coarse filter screen and a medium filter screen, and the second filter layer is a HEPA filter screen.
10. The medical air sterilizer of claim 1, wherein the housing is made of an antibacterial stainless steel material; the bottom of the shell is provided with a travelling wheel; the photocatalysis filter layer and the centrifugal fan are respectively installed in the shell in a modularized manner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921481129.3U CN210921638U (en) | 2019-09-06 | 2019-09-06 | Medical air sterilizing purifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921481129.3U CN210921638U (en) | 2019-09-06 | 2019-09-06 | Medical air sterilizing purifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454891A (en) * | 2019-09-06 | 2019-11-15 | 广东粤能净环保科技有限公司 | Medical air disinfection purifier |
| CN111912046A (en) * | 2020-07-14 | 2020-11-10 | 张晓焦 | Air filtering device, equipment, preparation method and air filtering method |
| CN113375264A (en) * | 2021-06-29 | 2021-09-10 | 安徽钟强防护科技有限公司 | Air purification device and working method thereof |
-
2019
- 2019-09-06 CN CN201921481129.3U patent/CN210921638U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454891A (en) * | 2019-09-06 | 2019-11-15 | 广东粤能净环保科技有限公司 | Medical air disinfection purifier |
| CN111912046A (en) * | 2020-07-14 | 2020-11-10 | 张晓焦 | Air filtering device, equipment, preparation method and air filtering method |
| CN113375264A (en) * | 2021-06-29 | 2021-09-10 | 安徽钟强防护科技有限公司 | Air purification device and working method thereof |
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Address after: 272000 Workshop 1, Floor 1, Building A1, Zhongke Science and Technology Innovation Park, Intersection of Shanhe Road and Rongchang Road, Liuhang Street, High-tech Zone, Jining City, Shandong Province Patentee after: Zhongke Yuenengjing (Shandong) New Material Co.,Ltd. Address before: 511430 room 909, Tian'an science and technology innovation building, Panyu energy saving science and Technology Park, No. 555, North Panyu Avenue, Donghuan street, Panyu District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG YUENENGJING ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |