CN212204833U - Air filter, air purifier, kitchen air conditioner, air conditioner oil smoke all-in-one - Google Patents
Air filter, air purifier, kitchen air conditioner, air conditioner oil smoke all-in-one Download PDFInfo
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Abstract
The utility model relates to an air filter, an air purifier, a kitchen air conditioner, an air conditioning and oil smoke integrated machine and a fresh air system, wherein, the air filter is used for filtering kitchen air and comprises a filtering surface which comprises a first filtering net; and a second filter; in the filtering surface, the first filter screen is a coarse filter screen, and the second filter screen is a filter screen with a high or medium efficiency. The air filter has the advantages of low pressure loss, high circulation efficiency and the like.
Description
Technical Field
The utility model relates to an air purification technical field especially relates to an air cleaner, air purifier, kitchen air conditioner, air conditioner oil smoke all-in-one and new trend system.
Background
In daily life, the cooking in a kitchen cannot be kept no matter in Chinese style or western style diet. More than 300 harmful substances are reported to be contained in the kitchen oil smoke, and among them, various high molecular polymers and benzopyrene have carcinogenic effect on human bodies. In addition to soot, a large amount of PM2.5 is also produced during cooking. For example, the atmospheric physics research institute of the Chinese academy of sciences found that 15% to 20% of PM2.5 particulate pollutants in the city of Beijing were derived from kitchen exhaust gas in the summer of 2012. These large quantities of harmful substances are exhausted to the outside through the hood and ventilation.
Meanwhile, cooking fumes and PM2.5 exhaust gas remain in the indoor space, affecting the indoor environment and human health. Meanwhile, a damp and greasy environment of the kitchen creates good conditions for breeding various bacteria and viruses. Conceivably, if the kitchen air is not purified for a long time, the human health is influenced.
In the existing kitchen air conditioning system, an air filter of the kitchen air conditioning system adopts a coarse filter screen similar to a conventional air conditioner, can only filter partial large particulate matters generally, and is difficult to filter PM2.5, and if the PM2.5 filter in the existing air purifier is adopted, the resistance is too high, and the phenomena of blockage and the like are easy to occur.
Therefore, there is a need in the art for an air filter, an air purifier, a kitchen air conditioner, and a fresh air system to solve the problem of kitchen air purification.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an air cleaner.
An object of the utility model is to provide an air purifier.
An object of the utility model is to provide a kitchen air conditioner.
An object of the utility model is to provide an air conditioner oil smoke all-in-one.
An object of the utility model is to provide a new trend system.
According to the utility model discloses an air cleaner of aspect for kitchen air filtration, air cleaner includes a filtering surface, should filter the surface and include: a first filter screen; and a second filter; in the filtering surface, the first filter screen is a coarse filter screen, and the second filter screen is a filter screen with a high or medium efficiency.
According to the utility model discloses an air cleaner of aspect for kitchen air filtration, air cleaner includes a filtering surface, should filter the surface and include: a first filter screen; and a second filter; wherein, in the filtering surface, first filter screen is the coarse oil smoke filter screen, the second filter screen is the PM2.5 filter screen.
In one or more embodiments of the air filter, the first filter web is connected to the second filter web in the filter face, the second filter web having a filter area 1/4-1/2 of the filter area of the filter face.
In one or more embodiments of the air filter, a second filter screen is positioned in the middle of the filtering surface, and the first filter screens are respectively positioned on two sides of the second filter screen symmetrically; or, the first filter screens and the second filter screens are alternately connected.
In one or more embodiments of the air filter, the first filter mesh is a woven filter mesh or a filter nonwoven and a mesh plate thereof, and the woven filter mesh or the filter nonwoven is planar or folded; and/or the second filter screen is a filter screen which is formed by folding a hard non-woven fabric and a melt-blown non-woven fabric in a compounding way; the first filter screen and/or the second filter screen are/is an antibacterial filter screen; the first filter screen and the second filter screen are combined and connected through hot melt adhesives, clamping grooves or buckles; the filtering area of the second filter screen accounts for 1/3 of the filtering area of the filtering surface.
In one or more embodiments of the air filter, the first filter screen is made of a PP material and has an antibacterial function, the filament diameter is 0.14 mm, the warp-weft density is 24 pieces/cm, the folding height is 19mm, and the folding distance is 13mm, and the second filter screen is made of an antibacterial hard non-woven fabric, the thickness is 0.45mm, and the gram weight is 50 g/square meter; and an antibacterial melt-blown nonwoven fabric with a thickness of 0.30mm and a gram weight of 18 g/m; the folding height is 19mm, the folding distance is 3mm, and the area of the second filter screen is 1/3 of the area of the filter surface;
or
The first filter screen is made of PP materials and has an antibacterial function, the filament diameter is 0.20mm, the warp density is 13 pieces/cm, the weft density is 15 pieces/cm, the folding height is 19mm, and the folding distance is 13mm, and the second filter screen is made of antibacterial hard non-woven fabrics, the thickness is 0.45mm, and the gram weight is 50 g/square meter; and an antibacterial melt-blown nonwoven fabric with a thickness of 0.30mm and a gram weight of 18 g/m; the folding height is 19mm, the folding distance is 3mm, and the area of the second filter screen is 1/3 of the area of the filter surface;
or
The first filter screen is made of PP materials and has an antibacterial function, the filament diameter is 0.16 mm, the warp density is 13 pieces/cm, the weft density is 12 pieces/cm, the folding height is 19mm, and the folding distance is 13mm, and the second filter screen is made of antibacterial hard non-woven fabrics, the thickness is 0.50mm, and the gram weight is 50 g/square meter; and an antibacterial melt-blown nonwoven fabric with a thickness of 0.25mm and a grammage of 15 g/m; the folding height is 19mm, the folding distance is 3mm, and the area of the second filter screen is 1/3 of the area of the filter surface.
According to the utility model discloses an aspect's an air purifier, include above arbitrary one air cleaner.
The utility model discloses a kitchen air conditioner of an aspect, include above arbitrary one air cleaner.
According to the utility model discloses an aspect's an air conditioner oil smoke all-in-one, include above arbitrary one air cleaner.
According to the utility model discloses a new trend system of aspect, include above arbitrary one air cleaner.
The utility model discloses an advance effect can include but not limited to:
1. the combination setting of coarse filter screen and filter screen more than high-medium efficiency, perhaps the combination setting of oil smoke filter screen and PM2.5 filter screen is adopted to same filter surface for the coarse filter oil smoke filter screen can filter large granule oil smoke pollutant, and the PM2.5 filter screen can intercept multiple high molecular polymer. The filter has the advantages of low integral resistance, high circulation efficiency and excellent purification performance;
2. the first filter screen and/or the second filter screen are/is added with a sterilization and mildew-proof function, so that germs in the air of a kitchen can be effectively killed;
3. the combination of the first filter screen and the second filter screen is arranged on the same filtering surface, so that the filter is compact in structure, small in size and convenient to replace the filter screen or clean and maintain.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, it being noted that the drawings are given by way of example only and are not drawn to scale, and should not be taken as limiting the scope of the invention, which is actually claimed, wherein:
FIG. 1 is a schematic diagram of an air filter according to one or more embodiments.
Fig. 2 is a schematic view of a first filter web of the air filter according to fig. 1.
Fig. 3A and 3B are schematic structural views of a second filter mesh of the air filter according to fig. 1.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present invention.
In addition, it should be understood that the terms "first", "second", etc. are used to define the components, and are only used to distinguish the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited thereto. Reference to "an embodiment," "one or more embodiments," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
For example, the kitchen air described in the above embodiments refers to the polluted air generated by the purification cooking process, and is generally generated and remained in the closed kitchen space, but it does not mean that the devices such as the air filter, the kitchen air conditioner, the air conditioning and soot collector, the air purifier, the fresh air system, and the like described in the following embodiments are necessarily arranged in the closed kitchen, for example, a house adopting an open kitchen, the devices such as the air filter, the air purifier, the kitchen air conditioner, and the like are arranged in the area near the kitchen space to purify the polluted air generated by the cooking process, even a uniform fresh air system can be arranged in the house adopting the open kitchen to process the kitchen air, and the description of the following embodiments is not limited.
Referring to fig. 1 and 2, in one embodiment, an air filter for kitchen air filtration includes a filtering surface 10, and the filtering surface 10 includes a first filter 1 and a second filter 2. I.e. the same filtering surface 10 comprises a combination of several sieves. It should be understood that the filtering surface 10 shown in fig. 1 and 2 is a planar structure, but it may be in other forms, such as a curved form, and is not limited to the planar form shown in the figures. The first filter screen 1 is a coarse filter screen, and the second filter screen 2 is a filter screen with higher or middle efficiency. The term "high-medium efficiency" refers to a filtering effect of more than high-medium efficiency, a coarse-efficiency filtering net, or a filtering net with more than high-medium efficiency, and refers to the definition of the current national standard GB/T14295 "air filter", and the detailed description thereof is omitted here. The beneficial effect who so sets up lies in, filtering surface 10 adopts coarse effect filter screen to filter large granule oil smoke pollutant for first filter screen 1 to and the filter screen more than high-middle efficiency filters multiple high molecular polymer as second filter screen 2, and the combination setting of both specific area scopes, has both realized that the filter filters more kinds of pollutants, has also reduced filtration resistance, makes the filter circulation fast, and purification performance is excellent, also need not anxious jam and frequently change the filter screen. It can be understood that the first filter screen 1 and the second filter screen 2 can also be other types of filter screens, so that the first filter screen 1 is a coarse-efficiency oil smoke filter screen for filtering large-particle oil smoke pollutants; the second filter screen 2 is a PM2.5 filter screen, and has an effect of filtering various high molecular polymers, for example, the first filter screen 1 may be a woven air filter screen (woven air filter net) defined in mechanical industry standard JB/T10718 "woven air filter screen for air conditioners".
With continued reference to fig. 1 and 2, in some embodiments, the specific configuration of the filter surface 10 may be that the first filter 1 is connected to the second filter 2, and the filter area of the second filter 2 may be 1/4-1/2, preferably 1/3, of the filter area of the filter surface 10, which has the effect of the test results described below. The beneficial effect that so sets up lies in, the area ratio of rational distribution second filter screen 2 accounting for whole filtering surface 10 can further optimize the pressure loss and the circulation efficiency performance of balanced filter.
The position relation between the first filter screen 1 and the second filter screen 2 can be that the second filter screen 2 shown in fig. 1 and fig. 2 is located in the middle of the filtering surface 10, and the first filter screen 1 is respectively symmetrically located at two sides of the second filter screen 2, so that the filtering effect is better. It should be understood that the second filter 2 is not limited to one place, and a plurality of second filters 2 may be alternately disposed on the filtering surface 10, or a plurality of first filters 1 and a plurality of second filters 2 may be alternately disposed. The connection between the first filter screen 1 and the second filter screen 2 can be overheating glue, or a clamping groove and a buckle 3 which are combined, the hot glue is simple in process and reliable in fixed sealing, the clamping groove and the buckle are combined and connected, the clamping groove and the buckle are easy to disassemble and maintain, and the second filter screen 2 can be detached alone for replacement.
Additionally, in one or more embodiments, first filter 1, second filter 2 are first filters and/or the second filter is an antimicrobial filter. The process of the antibacterial filter screen is prior art, and can be carried out, for example, by the method of finishing the antibacterial fabric, for example, the antibacterial auxiliary agent is post-finished on the fabric by padding, dipping, coating or spraying. The type of the antibacterial finishing agent can be selected according to the actual antibacterial requirement, and is not described in detail herein. The antibacterial filter screen has the beneficial effects that germs in the air of a kitchen can be effectively killed, and the antibacterial filter screen is particularly beneficial to sealing a wet kitchen space.
In some embodiments, the specific structure and material of the first filter screen 1 may be a woven filter screen or a non-woven oil smoke filter fabric and a mesh plate thereof, the woven filter screen or the non-woven oil smoke filter fabric is planar or folded, and the mesh plate means that the periphery of the filter screen contains a plastic frame. The coarse oil fume filter screen can be made of PET or PP, and has the functions of antibiosis, mildew prevention and the like, the process for realizing the functions of antibiosis, mildew prevention and the like can adopt the antibacterial fabric finishing method introduced in the embodiment, the filament diameter and the mesh density can be customized according to the pressure loss requirement, and the preferred filament diameter of the PET is 0.05-0.13mm, the density is 15-37 pieces/cm, the filament diameter of the PP is 0.08-0.20mm, and the density is 11-48 pieces/cm. The first filter screen 1 can be planar or folded, the folding height is determined according to the thickness requirement of the filter, the folding distance is determined according to the pressure loss requirement, and preferably, the folding height is 3-30mm, and the folding distance is 2-15 mm.
In some embodiments, referring to fig. 3A and 3B, the specific structure and material of the second filter 2 may be a folded filter formed by combining a hard nonwoven fabric and a meltblown nonwoven fabric. The hard non-woven fabric is a non-woven fabric with an antibacterial function, and the process for realizing the antibacterial and mildew-proof functions can adopt the antibacterial fabric finishing method introduced in the above embodiment, the thickness is 0.40-1.0mm, and the gram weight is 40-100 g/square meter; the melt-blown non-woven fabric is a non-woven fabric with an antibacterial function, and the process for realizing the antibacterial and mildew-proof functions can adopt the antibacterial fabric finishing method introduced in the above embodiment, wherein the thickness is 0.20-0.60mm, and the gram weight is 10-50 g/square meter. More preferably, the thickness of the hard non-woven fabric is 0.5-0.6mm, and the gram weight is 50-60 g/square meter; the thickness of the melt-blown non-woven fabric is 0.20-0.3mm, and the gram weight is 10-20 g/square meter. The two materials can be compounded in a glue spraying, ultrasonic or hot rolling mode, and then the PM2.5 filter screen is manufactured through processes of folding, cutting, gluing, edge sealing and the like.
The advantages of the air filter described in the above embodiments will be more apparent from the test results described below.
Five controls, three experimental groups, two control groups were used for the test, as follows:
The first filter screen 1 is made of PP materials and has an antibacterial function, the diameter of the filter screen is 0.14 mm, the density of warp and weft directions is 24 pieces/cm, the folding height is 19mm, the folding distance is 13mm, and then the filter screen is formed by injection molding.
The second filter screen 2 is made of hard non-woven fabric with an antibacterial function, the thickness is 0.45mm, and the gram weight is 50 g/square meter; the antibacterial melt-blown filter material is 0.30mm in thickness and 18 g/square meter in gram weight, and is prepared into the filter material by glue spraying and compounding. The filter material is folded (the folding height is 19mm, and the folding distance is 3mm), cut, glued and edge sealed to form the filter screen.
The area of the second filter screen 2 is 1/3 of the area of the filter surface 10, and the first filter screen 1 and the second filter screen 2 are combined together in a clamping groove mode.
The first filter screen 1 is made of PP materials and has an antibacterial function, the yarn diameter is 0.20mm, the warp density is 13 pieces/cm, the weft density is 15 pieces/cm, the folding height is 19mm, the folding distance is 13mm, and then the first filter screen is formed by injection molding.
The second filter screen 2 is made of hard non-woven fabric with an antibacterial function, the thickness is 0.45mm, and the gram weight is 50 g/square meter; the antibacterial melt-blown filter material is 0.30mm in thickness and 18 g/square meter in gram weight, and is prepared into the filter material by glue spraying and compounding. The filter material is folded (the folding height is 19mm, and the folding distance is 3mm), cut, glued and edge sealed to form the filter screen.
The area of the second filter screen 2 is 1/3 of the area of the filter surface 10, and the first filter screen 1 and the second filter screen 2 are combined together in a clamping groove mode.
The first filter screen 1 is made of PP materials and has an antibacterial function, the yarn diameter is 0.16 mm, the warp density is 13 pieces/cm, the weft density is 12 pieces/cm, the folding height is 19mm, the folding distance is 13mm, and then the first filter screen is formed by injection molding.
The second filter screen 2 is made of hard non-woven fabric with an antibacterial function, the thickness is 0.50mm, and the gram weight is 50 g/square meter; the antibacterial melt-blown filter material is 0.25mm in thickness and 15 g/square meter in gram weight, and is prepared into the filter material by glue spraying and compounding. The filter material is folded (the folding height is 19mm, and the folding distance is 3mm), cut, glued and edge sealed to form the filter screen.
The area of the second filter screen 2 is 1/3 of the area of the filter surface 10, and the first filter screen 1 and the second filter screen 2 are combined together in a clamping groove mode.
The filtering surface 10 only adopts the first filter screen 1, the first filter screen 1 adopts PP material, and has antibacterial function, the yarn diameter is 0.14 mm, the warp and weft density is 24 pieces/cm, the folding height is 19mm, the folding distance is 13mm, and then the plastic injection molding is carried out.
The filtering surface 10 only adopts the second filter screen 2, the second filter screen 2 adopts the antibacterial function hard non-woven fabric, the thickness is 0.50mm, and the gram weight is 50 g/square meter. The antibacterial melt-blown filter material is 0.25mm in thickness and 15 g/square meter in gram weight, and is prepared into the filter material by glue spraying and compounding. The filter material is folded (the folding height is 19mm, and the folding distance is 3mm), cut, glued and edge sealed to form the filter screen.
The test conditions and devices can refer to the national standard GB/T14295, which is not described herein.
As shown in table 1, the inventors unexpectedly found that the air filter using the first filter web 1 and the second filter web 2 of the experimental group 1 in combination has a higher circulation efficiency than the air filter using only the second filter web 2 of the control group 2. The inventor considers that only the second filter screen 2 is adopted, the air circulation frequency is reduced due to the high pressure loss, and the efficiency of removing the particulate matters is reduced. Therefore, the technical scheme that the first filter screen 1 and the second filter screen 2 are combined in the same filter surface 10 is proved to obtain unexpected technical effects instead of simple superposition. Compared with the filtering surface which adopts the second filter screen 2 completely, the effect of reducing pressure loss and improving the circulation efficiency is achieved at the same time, and the pressure loss is reduced by sacrificing the circulation efficiency by simply adjusting the total area occupied by the second filter screen 2. Further, it can be seen from the test results in table 1 that the air filter described in the above embodiment is particularly suitable for air purification equipment, such as an air purifier, a kitchen air conditioner, an air conditioning and soot integrating machine, a fresh air system, and the like, and for specific cycle efficiency and pressure loss requirements, for example, the first filter screens with different densities and different areas may be selected to adjust the overall pressure loss of the filter.
Table 1: comparison of Performance tests for different air filters
To sum up, adopt above-mentioned introduction embodiment's air cleaner, air purifier, kitchen air conditioner and new trend system's beneficial effect to include:
1. the combination setting of coarse filter screen and filter screen more than high-medium efficiency, perhaps the combination setting of oil smoke filter screen and PM2.5 filter screen is adopted to same filter surface for the coarse filter oil smoke filter screen can filter large granule oil smoke pollutant, and the PM2.5 filter screen can intercept multiple high molecular polymer. The filter has the advantages of low integral resistance, high circulation efficiency and excellent purification performance;
2. the first filter screen and/or the second filter screen are/is added with a sterilization and mildew-proof function, so that germs in the air of a kitchen can be effectively killed;
3. the first filter screen is arranged on the same filtering surface and connected with the second filter screen, so that the filter is compact in structure, small in size and convenient to replace the filter screen or clean and maintain.
Although the present invention has been described with reference to the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.
Claims (10)
1. An air filter for kitchen air filtration, said air filter comprising a filter surface, said filter surface comprising:
a first filter screen; and
a second filter screen;
in the filtering surface, the first filter screen is a coarse filter screen, and the second filter screen is a filter screen with a high or medium efficiency.
2. An air filter for kitchen air filtration, said air filter comprising a filter surface, said filter surface comprising:
a first filter screen; and
a second filter screen;
wherein, in the filtering surface, first filter screen is the coarse oil smoke filter screen, the second filter screen is the PM2.5 filter screen.
3. An air filter according to claim 1 or 2, wherein the first filter web is connected to the second filter web in the filter surface, the second filter web having a filter area which is 1/4-1/2 of the filter area of the filter surface.
4. The air filter of claim 3, wherein a second filter screen is positioned in the middle of the filtering surface, and the first filter screens are respectively positioned on two sides of the second filter screen symmetrically; or, the first filter screens and the second filter screens are alternately connected.
5. The air filter according to claim 3, wherein the first filter mesh is a woven filter mesh or a filter nonwoven and a mesh plate thereof, the woven filter mesh or the filter nonwoven being planar or folded; and/or the second filter screen is a filter screen which is formed by folding a hard non-woven fabric and a melt-blown non-woven fabric in a compounding way; the first filter screen and/or the second filter screen are/is an antibacterial filter screen; the first filter screen and the second filter screen are combined and connected through hot melt adhesives, clamping grooves or buckles; the filtering area of the second filter screen accounts for 1/3 of the filtering area of the filtering surface.
6. The air filter of claim 5,
the first filter screen is made of PP materials and has an antibacterial function, the diameter of the yarn is 0.14 mm, the density of warp and weft directions is 24 pieces/cm, the folding height is 19mm, and the folding distance is 13mm, the second filter screen is made of antibacterial hard non-woven fabrics, the thickness is 0.45mm, and the gram weight is 50 g/square meter; and an antibacterial melt-blown nonwoven fabric with a thickness of 0.30mm and a gram weight of 18 g/m; the folding height is 19mm, the folding distance is 3mm, and the area of the second filter screen is 1/3 of the area of the filter surface;
or
The first filter screen is made of PP materials and has an antibacterial function, the filament diameter is 0.20mm, the warp density is 13 pieces/cm, the weft density is 15 pieces/cm, the folding height is 19mm, and the folding distance is 13mm, and the second filter screen is made of antibacterial hard non-woven fabrics, the thickness is 0.45mm, and the gram weight is 50 g/square meter; and an antibacterial melt-blown nonwoven fabric with a thickness of 0.30mm and a gram weight of 18 g/m; the folding height is 19mm, the folding distance is 3mm, and the area of the second filter screen is 1/3 of the area of the filter surface;
or
The first filter screen is made of PP materials and has an antibacterial function, the filament diameter is 0.16 mm, the warp density is 13 pieces/cm, the weft density is 12 pieces/cm, the folding height is 19mm, and the folding distance is 13mm, and the second filter screen is made of antibacterial hard non-woven fabrics, the thickness is 0.50mm, and the gram weight is 50 g/square meter; and an antibacterial melt-blown nonwoven fabric with a thickness of 0.25mm and a grammage of 15 g/m; the folding height is 19mm, the folding distance is 3mm, and the area of the second filter screen is 1/3 of the area of the filter surface.
7. An air cleaner comprising an air filter according to any one of claims 1 to 6.
8. Kitchen air conditioner, characterized in that it comprises an air filter according to any one of claims 1-6.
9. An air conditioning and lampblack integrating machine is characterized by comprising the air filter as claimed in any one of claims 1 to 6.
10. A fresh air system comprising an air filter according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922486787.8U CN212204833U (en) | 2019-12-30 | 2019-12-30 | Air filter, air purifier, kitchen air conditioner, air conditioner oil smoke all-in-one |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922486787.8U CN212204833U (en) | 2019-12-30 | 2019-12-30 | Air filter, air purifier, kitchen air conditioner, air conditioner oil smoke all-in-one |
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| CN212204833U true CN212204833U (en) | 2020-12-22 |
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| CN201922486787.8U Active CN212204833U (en) | 2019-12-30 | 2019-12-30 | Air filter, air purifier, kitchen air conditioner, air conditioner oil smoke all-in-one |
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| CN (1) | CN212204833U (en) |
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