CN212930379U - Dual-system air sterilizer - Google Patents
Dual-system air sterilizer Download PDFInfo
- Publication number
- CN212930379U CN212930379U CN202021276509.6U CN202021276509U CN212930379U CN 212930379 U CN212930379 U CN 212930379U CN 202021276509 U CN202021276509 U CN 202021276509U CN 212930379 U CN212930379 U CN 212930379U
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- Prior art keywords
- sterilizer
- air
- cavity
- sterilization
- sterilization cavity
- 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.)
- Expired - Fee Related
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- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 97
- 230000001954 sterilising effect Effects 0.000 claims abstract description 65
- 239000003054 catalyst Substances 0.000 claims abstract description 35
- 230000003197 catalytic effect Effects 0.000 claims abstract description 21
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000009977 dual effect Effects 0.000 claims abstract description 18
- 239000011941 photocatalyst Substances 0.000 claims description 13
- 150000001450 anions Chemical class 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 abstract description 17
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000007872 degassing Methods 0.000 abstract description 2
- 241001233242 Lontra Species 0.000 abstract 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 241000700605 Viruses Species 0.000 description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910002370 SrTiO3 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 229910052949 galena Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052950 sphalerite Inorganic materials 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
Images
Classifications
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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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- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The utility model discloses a dual system air disinfector, include: the sterilizer comprises a sterilizer shell, an electronic sterilization module, a catalytic catalyst system, a negative ion generator and a fan; the utility model discloses a work is switched in turn to two electron disinfection modules, ensures that degassing unit is stable continuous work for a long time, ensures to disinfect continuously, has prolonged air disinfector electron device's life, and first disinfection chamber makes air and electron disinfection module contact, produces more disinfection factors, and the width that increases the second disinfection chamber makes air flow rate slow down, and it is more abundant to disinfect, stops the discharge of ozone, and the catalyst otter board adopts the mode of joint, and the change is conveniently dismantled.
Description
Technical Field
The utility model relates to an air sterilizer, in particular to a dual-system air sterilizer.
Background
The electronic disinfection module of the air disinfector in the prior art generates disinfection factors under high pressure, electronic components generate large heat, and need to be cooled after working for a period of time, otherwise, the service life is very short, and the long-time working cannot be met. Modules generating disinfection factors in the conventional disinfection system are basically disinfected in a clearance disinfection mode of stopping for a period of time after working for a period of time, and the electronic disinfection modules are cooled in a temporary stopping mode; this type of sterilization cannot be continued with major drawbacks, which can lead to the failure of the entire sterilization system once the electronic sterilization module has been damaged.
Therefore, a need exists for a dual system air sterilizer.
Disclosure of Invention
The utility model provides a dual system air disinfector solves the problem that the long-time work device of air disinfector damaged easily, ensures the long-term stable work of degassing unit.
The utility model adopts the following technical proposal that the double-system air sterilizer comprises:
the sterilizer shell is provided with an air inlet and an air outlet, a negative pressure cavity and a sterilization cavity are arranged in the sterilizer shell, the air outlet is symmetrically arranged on two sides of the negative pressure cavity, the sterilization cavity is divided into a first sterilization cavity positioned at the front end and a second sterilization cavity positioned at the rear end, the front end of the first sterilization cavity is communicated with the air inlet, two groups of mounting grooves are arranged on two sides of the first sterilization cavity, the front end of the second sterilization cavity is directly communicated with the rear end of the first sterilization cavity, the rear end of the second sterilization cavity is directly communicated with the negative pressure cavity, a plurality of groups of clamping grooves are arranged on two sides of the second sterilization cavity, the width of the first sterilization cavity is below 1/3 of the width of the second sterilization cavity, and a convex structure with a small front end and a large rear end is formed;
the catalytic catalyst system comprises a screen plate and a catalytic catalyst loaded on the screen plate, and the screen plate is clamped with the clamping groove;
two electronic disinfection modules, the electronic disinfection module is installed in the mounting groove.
Further, the double-system air sterilizer, two fans are symmetrically installed in the negative pressure cavity, and the fans are connected with the air outlet.
Further, the catalytic catalyst is a cold catalyst or a photocatalyst.
Further, the catalytic catalyst adopts a photocatalyst, and the catalytic catalyst system further comprises an ultraviolet lamp.
Further, the ultraviolet lamp is installed in the first sterilization chamber.
Furthermore, the edge of the mesh plate is provided with a sealing gasket which is in interference fit with the inner wall of the disinfector shell.
Further, the electronic disinfection module is a high-energy ion generator or an ozone generator.
Further, the dual-system air sterilizer further comprises a negative ion generator arranged at the air outlet.
Further, the dual-system air sterilizer further comprises an advertisement screen arranged on the front surface of the sterilizer shell.
Compared with the prior art, the utility model discloses dual system air disinfector's beneficial effect lies in:
(1) the two electronic disinfection modules are switched to work in turn, so that the long-term stable and continuous work of the disinfection device is ensured, the disinfection can be continuously and uninterruptedly carried out, and the service life of electronic devices of the air disinfector is prolonged;
(2) the first disinfection cavity enables air to be in contact with the electronic disinfection module, more disinfection factors are generated, the width of the second disinfection cavity is increased, so that the air flow rate is reduced, the disinfection is more sufficient, and the discharge of ozone is avoided;
(3) the catalytic catalyst screen plate adopts a clamping mode, and is convenient to disassemble and replace.
Drawings
FIG. 1 is a schematic front view of the internal structure of the dual system air sterilizer of the present invention;
FIG. 2 is a schematic front view of the outer surface of the dual system air sterilizer of the present invention;
wherein: 1: sterilizer housing, 1-1: air inlet, 1-2, 1-3: gas outlet, 1-4: mounting groove, 2-1, 2-2: catalytic catalyst screen plate, 3-1, 3-2 fans, 4-1, 4-2: high-energy ion generator, 5-1, 5-2: anion generator, 6: an advertisement screen.
FIG. 3 is a schematic front view of the internal structure of another embodiment of the dual system air sterilizer of the present invention;
wherein: 1: sterilizer housing, 1-1: air inlet, 1-2, 1-3: gas outlet, 1-4: mounting groove, 2-1, 2-2: cold catalyst screen, 2-3: ultraviolet lamp, 2-4: photocatalyst screen plate, 3-1, 3-2 blower, 4-1, 4-2: ozone generator, 5-1, 5-2: and a negative ion generator.
Detailed Description
The following detailed description of the specific implementation steps is provided in conjunction with the accompanying drawings:
example one
As shown in figures 1-2, it is an embodiment of the dual system air sterilizer of the present invention. A dual system air sterilizer comprising:
(1) the sterilizer comprises a sterilizer shell 1, the sterilizer shell 1 is provided with an air inlet 1-1 and air outlets 1-2 and 1-3, a negative pressure cavity and a sterilization cavity are arranged in the sterilizer shell 1, the air outlets 1-2 and 1-3 are symmetrically arranged at two sides of the negative pressure cavity, the sterilization cavity is divided into a first sterilization cavity at the front end and a second sterilization cavity at the rear end, the front end of the first sterilization cavity is communicated with the air inlet 1-1, two groups of mounting grooves 1-4 are arranged at two sides of the first sterilization cavity, the front end of the second sterilization cavity is directly communicated with the rear end of the first sterilization cavity, the rear end of the second sterilization cavity is directly communicated with the negative pressure cavity, a plurality of groups of clamping grooves 1-5 are arranged at two sides of the second sterilization cavity, three groups are arranged in the embodiment, the width of the first sterilization cavity is below 1/3 of the width of the second sterilization cavity, a convex structure with a small front end and a large rear end is, air outside the sterilizer shell 1 enters the sterilizing cavity through the air inlet 1-1, and the width of the first sterilizing cavity and the second sterilizing cavity ensures that the air is sterilized more fully, thereby avoiding the discharge of ozone.
(2) The catalytic catalyst system comprises catalytic catalyst screen plates 2-1 and 2-2, catalytic catalysts are coated on the catalytic catalyst screen plates 2-1 and 2-2, the frames of the catalytic catalyst screen plates 2-1 and 2-2 are provided with sealing gaskets which are clamped in clamping grooves 1-5, the clamping grooves 1-5 are of a concave structure, air entering a second disinfection cavity is catalyzed by the catalytic catalyst screen plates 2-1 and 2-2 to decompose disinfection factors (such as ozone) in the air to generate active factors (such as hydroxyl radicals) with stronger disinfection capacity.
(3) The air sterilizer comprises two fans 3-1 and 3-2 for introducing air from an air inlet 1-1 and discharging air from air outlets 1-2 and 1-3, wherein the fans 3-1 and 3-2 are symmetrically arranged at two sides of a negative pressure cavity, the fans 3-1 and 3-2 are provided with air suction ports and air outlet ports, the air suction ports are arranged in the negative pressure cavity, the air outlet ports are connected with the air outlets 1-2 and 1-3 through two negative ion generators 5-1 and 5-2, the fans 3-1 and 3-2 suck the air in the negative pressure cavity from the air suction ports of the fans 3-1 and 3-2, the air is discharged out of the sterilizer shell 1 from the air outlets of the fans 3-1 and 3-2 through the air outlets 1-2 and 1-3, and negative pressure is generated in the negative pressure cavity at the.
(4) Two high-energy ion generators 4-1 and 4-2 are arranged in the mounting groove 1-4.
(5) Two negative ion generators 5-1 and 5-2 are arranged at the air outlets of the fans 3-1 and 3-2.
(6) And an advertisement screen 6 arranged on the front surface of the sterilizer casing 1.
When the sterilizer is used, the fans 3-1 and 3-2 start to rotate, air in the negative pressure cavity is sucked from the air suction opening and is exhausted from the air outlet to the sterilizer shell 1 through the air outlets 1-2 and 1-3, and negative pressure is generated in the negative pressure cavity at the moment, so that the air outside the sterilizer shell 1 enters the sterilizer shell 1 through the air inlet 1-1; the entering air firstly enters the high-energy ion generators 4-1 and 4-2, the high-energy ion generators 4-1 or 4-2 generate high-energy ions to kill bacteria and viruses in the air, the killed air enters the second disinfection cavity, the disinfection factors (such as ozone) in the air are catalytically decomposed by the catalytic catalyst net plates 2-1 and 2-2 to generate active factors (such as hydroxyl free radicals) with stronger disinfection and sterilization performance and stronger odor removal capacity, the active factors instantly kill the bacteria and viruses and decompose odor molecules to generate water and carbon dioxide, then the air with the disinfection and odor removal performance is sucked by the fans 3-1 and 3-2, the negative ion generators at the air outlets improve the air quality and further disinfect, and finally the air is discharged to the outside of the disinfector shell 1.
In this embodiment, the advertisement screen 6 may be an LED screen, a naked-eye 3D screen, an advertisement frame, or the like, and is used to display information and advertisements.
In this embodiment, the catalyst may be titanium dioxide, manganese dioxide or other metal oxide catalysts.
In this embodiment, the fans 3-1 and 3-2 are used for generating negative pressure in the negative pressure cavity, and other negative pressure generating and sucking devices can be adopted, and the number of the negative pressure generating and sucking devices can be two or more.
In the embodiment, the high-energy ion generators 4-1 and 4-2 work in turn, so that the sterilizer can work stably and continuously for a long time, continuous and uninterrupted sterilization is ensured, and the service life of electronic devices of the air sterilizer is prolonged.
In this embodiment, the fans 3-1 and 3-2 are used for generating negative pressure in the negative pressure cavity, and other negative pressure generating devices can be used, and the number of the negative pressure generating devices can be two or more.
In this embodiment, the specific control modes of the fans 3-1 and 3-2, the high-energy ion generators 4-1 and 4-2, the negative ion generators 5-1 and 5-2 and the advertisement screen 6 are common knowledge in the art.
Example two
Fig. 3 shows another embodiment of the dual system air sterilizer of the present invention. A dual system air sterilizer comprising:
(1) the sterilizer comprises a sterilizer shell 1, the sterilizer shell 1 is provided with an air inlet 1-1 and air outlets 1-2 and 1-3, a negative pressure cavity and a sterilization cavity are arranged in the sterilizer shell 1, the air outlets 1-2 and 1-3 are symmetrically arranged at two sides of the negative pressure cavity, the sterilization cavity is divided into a first sterilization cavity at the front end and a second sterilization cavity at the rear end, the front end of the first sterilization cavity is communicated with the air inlet 1-1, two groups of mounting grooves 1-4 are arranged at two sides of the first sterilization cavity, the front end of the second sterilization cavity is directly communicated with the rear end of the first sterilization cavity, the rear end of the second sterilization cavity is directly communicated with the negative pressure cavity, a plurality of groups of clamping grooves 1-5 are arranged at two sides of the second sterilization cavity, three groups are adopted in the embodiment, the width of the first sterilization cavity is below 1/3 of the width of the second sterilization cavity, a convex structure with a small front end and a large rear end is, air outside the sterilizer shell 1 enters the sterilizing cavity through the air inlet 1-1, and the width of the first sterilizing cavity and the second sterilizing cavity ensures that the air is sterilized more fully, thereby avoiding the discharge of ozone.
(2) The catalytic catalyst system comprises a photocatalyst screen plate 2-4, cold catalyst screen plates 2-1 and 2-2 and an ultraviolet lamp 2-3 for irradiating the photocatalyst screen plate 2-4 with light, wherein the photocatalyst is coated on the photocatalyst screen plate 2-4, the cold catalysts are coated on the cold catalyst screen plates 2-1 and 2-2, the photocatalyst screen plates 2-4, the frame of the cold catalyst screen 2-1, 2-2 is provided with a sealing pad which is clamped in the clamping groove 1-5, the ultraviolet lamp 2-3 is arranged in the first disinfection cavity, the clamping groove 1-5 is of a concave structure, air entering the second disinfection cavity is catalyzed and decomposed by disinfection factors (such as ozone) in the air through the photocatalyst screen 2-4 and the cold catalyst screen 2-1, 2-2, and active factors (such as hydroxyl radicals) with stronger disinfection capability are generated.
(3) The air sterilizer comprises two fans 3-1 and 3-2 for introducing air from an air inlet 1-1 and discharging air from air outlets 1-2 and 1-3, wherein the fans 3-1 and 3-2 are symmetrically arranged at two sides of a negative pressure cavity, the fans 3-1 and 3-2 are provided with air suction ports and air outlet ports, the air suction ports are arranged in the negative pressure cavity, the air outlet ports are connected with the air outlets 1-2 and 1-3 through negative ion generators 5-1 and 5-2 through air ducts, the fans 3-1 and 3-2 suck the air in the negative pressure cavity from the air suction ports of the fans 3-1 and 3-2, the air is discharged from the sterilizer shell 1 through the air outlets 1-2 and 1-3 of the fans 3-1 and 3-2, and negative pressure is generated in the negative pressure cavity at the moment.
(4) Two ozone generators 4-1, 4-2, the ozone generators 4-1, 4-2 are arranged in the mounting groove 1-4.
(5) Two negative ion generators 5-1 and 5-2 are arranged at the air outlets of the fans 3-1 and 3-2.
When the sterilizer is used, the fans 3-1 and 3-2 start to rotate, air in the negative pressure cavity is sucked from the air suction opening and is exhausted from the air outlet to the sterilizer shell 1 through the air outlets 1-2 and 1-3, and negative pressure is generated in the negative pressure cavity at the moment, so that the air outside the sterilizer shell 1 enters the sterilizer shell 1 through the air inlet 1-1; the entering air firstly reaches the ozone generator 4-1, 4-2, the ozone generator 4-1 or 4-2 generates ozone to kill bacteria and viruses in the air, the killed air enters the second disinfection cavity, the disinfection factor (such as ozone) in the air is catalytically decomposed through the photocatalyst screen 2-4 and the cold catalyst screen 2-1, 2-2 to generate an active factor (such as hydroxyl radical) with stronger sterilization and disinfection performance and stronger odor removal capability, the active factor instantly kills the bacteria and viruses and decomposes odor molecules to generate water and carbon dioxide, then the air with the sterilization and odor removal performance is sucked by the fan 3-1, 3-2, the anion generator in the air duct further sterilizes the air, and finally the air is discharged to the outside of the disinfector shell 1.
In this embodiment, the cold catalyst may be titanium dioxide, manganese dioxide or other metal oxide catalysts.
In this embodiment, the photocatalyst may be nano TiO2, ZnO, CdS, WO3, Fe2O3, PbS, SnO2, ZnS, SrTiO3, SiO2, or the like.
In this embodiment, the fans 3-1 and 3-2 are used for generating negative pressure in the negative pressure cavity, and other negative pressure generating devices can be used, and the number of the negative pressure generating devices can be two or more.
In the embodiment, the ozone generators 4-1 and 4-2 work in turn, so that the sterilizer can work stably and continuously for a long time, continuous and uninterrupted sterilization is ensured, and the service life of electronic devices of the air sterilizer is prolonged.
In this embodiment, the specific control modes of the ultraviolet lamps 2-3, the fans 3-1, 3-2, the ozone generators 4-1, 4-2 and the anion generators 5-1, 5-2 are common knowledge in the art.
Claims (9)
1. A dual system air sterilizer, comprising:
the sterilizer shell is provided with an air inlet and an air outlet, a negative pressure cavity and a sterilization cavity are arranged in the sterilizer shell, the air outlet is symmetrically arranged on two sides of the negative pressure cavity, the sterilization cavity is divided into a first sterilization cavity positioned at the front end and a second sterilization cavity positioned at the rear end, the front end of the first sterilization cavity is communicated with the air inlet, two groups of mounting grooves are arranged on two sides of the first sterilization cavity, the front end of the second sterilization cavity is directly communicated with the rear end of the first sterilization cavity, the rear end of the second sterilization cavity is directly communicated with the negative pressure cavity, a plurality of groups of clamping grooves are arranged on two sides of the second sterilization cavity, the width of the first sterilization cavity is below 1/3 of the width of the second sterilization cavity, and a convex structure with a small front end and a large rear end is formed;
the catalytic catalyst system comprises a screen plate and a catalytic catalyst loaded on the screen plate, and the screen plate is clamped with the clamping groove;
two electronic disinfection modules, the electronic disinfection module is installed in the mounting groove.
2. The dual-system air sterilizer of claim 1, wherein two fans are symmetrically installed in the negative pressure chamber, and the fans are respectively connected to the air outlets.
3. The dual-system air sterilizer of claim 1, wherein the catalytic catalyst is a cold catalyst or a photocatalyst.
4. The dual system air sterilizer of claim 3, wherein the catalytic catalyst employs a photocatalyst, and the catalytic catalyst system further comprises an ultraviolet lamp.
5. The dual system air sterilizer of claim 4, wherein the ultraviolet lamp is mounted within the first sterilization chamber.
6. The dual system air sterilizer of claim 1, wherein the mesh plate is provided with a gasket on the edge for interference fit with the inner wall of the sterilizer housing.
7. The dual system air sterilizer of claim 1, wherein the electronic sterilization module is a high energy ionizer or an ozone generator.
8. The dual system air sterilizer of claim 2, further comprising an anion generator mounted to the air outlet.
9. The dual system air sterilizer of claim 1, further comprising an advertising screen disposed on a front face of the sterilizer housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276509.6U CN212930379U (en) | 2020-07-03 | 2020-07-03 | Dual-system air sterilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276509.6U CN212930379U (en) | 2020-07-03 | 2020-07-03 | Dual-system air sterilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212930379U true CN212930379U (en) | 2021-04-09 |
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ID=75327828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021276509.6U Expired - Fee Related CN212930379U (en) | 2020-07-03 | 2020-07-03 | Dual-system air sterilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212930379U (en) |
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2020
- 2020-07-03 CN CN202021276509.6U patent/CN212930379U/en not_active Expired - Fee Related
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Granted publication date: 20210409 |