CN214746276U - Air purifier - Google Patents

Air purifier Download PDF

Info

Publication number
CN214746276U
CN214746276U CN202023040114.9U CN202023040114U CN214746276U CN 214746276 U CN214746276 U CN 214746276U CN 202023040114 U CN202023040114 U CN 202023040114U CN 214746276 U CN214746276 U CN 214746276U
Authority
CN
China
Prior art keywords
air
purifier
air outlet
protective grid
filter screen
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.)
Active
Application number
CN202023040114.9U
Other languages
Chinese (zh)
Inventor
何定
刘治
张宏浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Qianan Technology Co ltd
Shenzhen Thousandshores Technology Co Ltd
Original Assignee
Shenzhen Qianan Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Qianan Technology Co ltd filed Critical Shenzhen Qianan Technology Co ltd
Priority to CN202023040114.9U priority Critical patent/CN214746276U/en
Priority to AU2021100204A priority patent/AU2021100204A4/en
Priority to AU2021100205A priority patent/AU2021100205A4/en
Priority to AU2021100203A priority patent/AU2021100203A4/en
Application granted granted Critical
Publication of CN214746276U publication Critical patent/CN214746276U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The utility model relates to the field of air purification, and provides an air purifier, which comprises a purifier body, a protective grid cover and an air outlet filter screen, wherein the purifier body is provided with an air outlet; the protective grid cover is detachably arranged at the air outlet in a covering manner, the protective grid cover is provided with a plurality of uniformly distributed unit grids, and the unit grids form ventilation openings communicated with the air outlet; the air outlet filter screen is detachably connected to the inner side of the protective grid; each vent is positioned in the filtering range of the air outlet filter screen. The air purifier prevents the hands of a user from being mistakenly inserted into the purifier body through the protective grid cover, so that the personal safety of the user can be guaranteed, and the use safety of the air purifier can be improved; and through the air-out filter screen of the inboard of locating the protection grid cover, it sees through inside each cell entering clarifier body of protection grid cover to block outside debris to can ensure the performance of clarifier body, can effectively avoid the fan trouble of clarifier body, can prolong air purifier's life.

Description

Air purifier
Technical Field
The utility model belongs to the technical field of air purification, especially, relate to an air purifier.
Background
The existing air purifier is provided with a grid structure at an air outlet so as to ensure the use safety. However, outside debris still easily get into inside air purifier through the clearance between the grid structure, so, not only influence air purifier's purifying effect easily, still lead to air purifier's fan trouble easily even to air purifier's performance and life have been reduced.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide an air purifier to among the solution prior art, outside debris easily get into inside air purifier through the clearance between the grid structure, thereby lead to air purifier's performance and the technical problem that life reduces.
In order to achieve the above object, the utility model adopts the following technical scheme: an air purifier, comprising:
the purifier body is provided with an air outlet;
the protective grid cover is detachably covered on the air outlet and provided with a plurality of uniformly distributed unit grids, and the unit grids form ventilation openings communicated with the air outlet;
the air outlet filter screen is detachably connected to the inner side of the protective grid;
wherein, each said vent lies in the filtration range of the said air-out filter screen.
In one embodiment, the purifier body is provided with a buckling seat, and one side of the protective grid cover is connected with a buckling structure capable of being buckled on the buckling seat.
In one embodiment, the protective grid cover is provided with at least one plug-in structure on one side thereof away from the buckle structure, and the purifier body is provided with a plug-in seat for plug-in matching with the plug-in structure.
In one embodiment, the number of the insertion structures is at least two, and each insertion structure is respectively arranged at two opposite sides of the buckle structure.
In one embodiment, the air purifier further includes an on-off switch disposed in the fastening seat and electrically connected to the purifier body, the on-off switch is closed when the fastening structure is fastened to the fastening seat and abutted against the fastening seat, and is opened when the fastening structure is not fastened to the fastening seat, and the on-off switch can limit the operation of the purifier body when the on-off switch is opened.
In one embodiment, the on-off switch is a microswitch.
In one embodiment, the fastening structure includes a first elastic portion connected to the protective grill cover and extending outward and downward, a second elastic portion connected to a lower end of the first elastic portion and extending outward and upward, and a fastening portion connected to an upper end of the second elastic portion and extending outward.
In one embodiment, the purifier body comprises a fan and a guide structure communicated between the fan and the air outlet, and the cross-sectional dimension of the guide structure is gradually enlarged in the direction away from the fan.
In one embodiment, the air outlet filter screen is made of metal.
In one embodiment, the air outlet is arranged on the upper side of the purifier body.
The utility model provides a beneficial effect lies in:
the air purifier provided by the embodiment of the utility model prevents the hand of the user from extending into the purifier body from the air outlet by mistake through the protective grid cover which is arranged at the air outlet, thereby ensuring the personal safety of the user and improving the use safety of the air purifier; the air outlet filter screen arranged on the inner side of the protective grid cover effectively prevents outside sundries from entering the purifier body through each cell of the protective grid cover, so that the using performance of the purifier body can be guaranteed, the fan fault of the purifier body can be effectively avoided, and the service life of the air purifier can be prolonged. And after using a period, still can dismantle protection grid cover and air-out filter screen from the clarifier body to clear up or change the air-out filter screen, thereby can ensure the performance of air-out filter screen, in order to avoid influencing air-purifying's emission, thereby can further ensure air purifier's performance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic perspective view of an air purifier according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along A-A as provided in FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B as provided in FIG. 1;
fig. 4 is a schematic perspective view of a protective grid cover according to an embodiment of the present invention;
FIG. 5 is a top view of the protective grid cover provided in FIG. 4;
fig. 6 is a partial schematic view of a purifier body according to an embodiment of the present invention;
fig. 7 is a partial schematic view two of the purifier body provided in fig. 6.
Wherein, in the figures, the respective reference numerals:
100-a purifier body, 101-an air outlet, 102-a buckle seat, 103-a plug seat, 110-a fan and 104-a guide structure; 200-protective grid cover, 201-unit lattice, 210-buckle structure, 211-first elastic part, 212-second elastic part, 213-buckle part, 220-plug structure.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The following describes the specific implementation of the present invention in more detail with reference to specific embodiments:
referring to fig. 1, 2 and 4, an embodiment of the present invention provides an air purifier, including a purifier body 100, a protective grid cover 200 and an air outlet filter screen (not shown in the figure), wherein the purifier body 100 has an air outlet 101; the protective grid cover 200 is detachably arranged on the air outlet 101 in a covering mode, the protective grid cover 200 is provided with a plurality of uniformly distributed unit cells 201, and the unit cells 201 form ventilation openings communicated with the air outlet 101; the air outlet filter screen is detachably connected to the inner side of the protective grid; wherein, each vent is located the filtering range of air-out filter screen.
It should be noted that the purifier body 100 has a purifying function, and can purify air and discharge the purified air to the external environment through the air outlet 101, so as to improve air quality.
Therefore, in the embodiment, the protective grid cover 200 is installed at the position prior to the air outlet 101 to prevent the hand of the user from extending into the purifier body 100 from the air outlet 101 by mistake, so that the personal safety of the user can be ensured, and the use safety of the air purifier can be improved.
Subsequently, this embodiment still in the inboard installation air-out filter screen of protective grid lid 200, the mesh of air-out filter screen is less, can effectively block outside debris through the air-out filter screen and see through each cell 201 of protective grid lid 200 and get into inside purifier body 100 to can ensure purifier body 100's performance, can effectively avoid purifier body 100's fan 110 trouble, can prolong air purifier's life. Wherein the inside of the protective grill cover 200 is with respect to the external environment.
The protective grid cover 200 has a plurality of cells 201 arranged in a rectangular array, and each cell 201 can be used as a ventilation opening, so that the purified air to be discharged from the air outlet 101 can firstly pass through the meshes of the air outlet filter screen and then be discharged to the external environment through each cell 201, i.e. each ventilation opening.
It should be noted that the protective grille cover 200 is detachably connected to the purifier body 100, so that the protective grille cover 200 can be easily assembled and disassembled. The air outlet filter screen and the protective grid cover 200 are also detachably connected, and the air outlet filter screen is relatively good in disassembly and assembly convenience. Therefore, after using for a period of time, the user can dismantle protective grid cover 200 from purifier body 100, and then dismantle the air-out filter screen from protective grid cover 200 to in clear up or change the air-out filter screen, thereby can ensure the performance of air-out filter screen, avoid influencing the discharge of air-purifying because of the mesh jam of air-out filter screen.
To sum up, the air purifier provided by the embodiment of the present invention prevents the user's hand from extending from the air outlet 101 into the purifier body 100 by mistake through the protective grid cover 200 covering the air outlet 101, so as to ensure the personal safety of the user and improve the safety of the air purifier; then, through the air outlet filter screen arranged on the inner side of the protective grid cover 200, the outside impurities are effectively prevented from entering the purifier body 100 through the unit cells 201 of the protective grid cover 200, so that the use performance of the purifier body 100 can be guaranteed, the fault of the fan 110 of the purifier body 100 can be effectively avoided, and the service life of the air purifier can be prolonged. And after using a period of time, still can dismantle protection grid cover 200 and air-out filter screen from clarifier body 100 to clear up or change the air-out filter screen, thereby can ensure the performance of air-out filter screen, in order to avoid influencing the emission of air-purifying, thereby can further ensure air purifier's performance.
Referring to fig. 2, 4 and 6, in the present embodiment, the purifier body 100 is provided with a fastening seat 102, and one side of the protective grid cover 200 is connected with a fastening structure 210 capable of being fastened to the fastening seat 102.
Through adopting above-mentioned scheme, protection grid lid 200 accessible buckle structure 210 buckle in buckle seat 102, and realize being connected with dismantling of clarifier body 100, based on this, can make protection grid lid 200 need not to realize the dismouting with the help of external instrument, and the dismouting is very convenient, and still can make protection grid lid 200 connect reliably and firm when connecting in clarifier body 100 to can ensure and improve protection grid lid 200's performance.
Referring to fig. 2, 5 and 7, in the embodiment, at least one insertion structure 220 is disposed on a side of the protective grid cover 200 away from the fastening structure 210, and the purifier body 100 is disposed with an insertion seat 103 for inserting and matching with the insertion structure 220.
By adopting the above scheme, on one hand, the snap structure 210 and the snap seat 102 can be quickly aligned by aligning the plug structure 220 and the plug seat 103, so that the protective grid cover 200 and the purifier body 100 can be quickly aligned, and the operation convenience of assembling and disassembling the protective grid cover 200 from the purifier body 100 is improved; on the other hand, when the protective grid cover 200 is connected to the purifier body 100, the connection relationship between the fastening structures 210 and the inserting structures 220 on the opposite sides of the protective grid cover 200 and the purifier body 100 can be established, which is beneficial to improving the connection stability and the connection reliability between the protective grid cover 200 and the purifier body 100, thereby ensuring and improving the use performance of the protective grid cover 200.
Referring to fig. 5 and 7, in the present embodiment, at least two insertion structures 220 are provided, and each insertion structure 220 is respectively disposed on two opposite sides of the fastening structure 210. Optionally, the plugging structures 220 respectively disposed at two opposite sides of the buckle structure 210 are symmetrically arranged with respect to the buckle structure 210.
By adopting the above scheme, on one hand, the buckling structures 210 can be facilitated to be quickly aligned to the buckling seats 102 in a centering manner through the inserting structures 220 respectively arranged on the two opposite sides of the buckling structures 210, so that the operation convenience of disassembling and assembling the protective grid cover 200 from the purifier body 100 can be further improved; on the other hand, the connection effect of the side of the protective grid cover 200 provided with the snap structure 210 and the side of the protective grid cover 200 provided with the plug structure 220 and the purifier body 100 can be equalized, and the connection effect of the protective grid cover 200 and the purifier body 100 on the opposite sides of the snap structure 210 can be equalized, so that the connection stability and the connection reliability of the protective grid cover 200 and the purifier body 100 can be further improved, and the use performance of the protective grid cover 200 can be improved.
Referring to fig. 1 and 2, in the present embodiment, the air purifier further includes an on-off switch (not shown) disposed in the fastening seat 102 and electrically connected to the purifier body 100, the on-off switch is closed when the fastening structure 210 is fastened to the fastening seat 102 and abuts against the fastening seat, and is opened when the fastening structure 210 is not fastened to the fastening seat 102, and the on-off switch can limit the operation of the purifier body 100 when the on-off switch is opened.
Here, the on-off switch is electrically connected to the control unit of the purifier body 100. When the fastening structure 210 is fastened to the fastening seat 102, that is, when the protective grille cover 200 is connected to the purifier body 100, the on-off switch is in a closed state due to being touched, and at this time, the purifier body 100 can be normally powered on. On the contrary, when the latch structure 210 is separated from the latch base 102, that is, when the protective grill cover 200 is detached from the purifier body 100, the on/off switch is turned to the off state, and at this time, even if the purifier body 100 is energized, the purifier body 100 cannot be operated, that is, the purification operation cannot be performed.
Therefore, by adopting the above scheme, when the protective grid cover 200 is detached from the purifier body 100, the operation of the purifier body 100 is limited by the on-off switch, and therefore, even if the hand of a user mistakenly extends into the purifier body 100 from the air outlet 101, the purifier body 100 cannot cause any damage to the user, so that the personal safety of the user can be further ensured, and the use safety of the air purifier can be further improved.
Referring to fig. 1 and 2, in the present embodiment, the on-off switch is a micro switch.
It should be noted that the micro switches are usually provided with a spring. When the fastening structure 210 is fastened to the fastening seat 102, that is, when the protective grille cover 200 is connected to the purifier body 100, the elastic sheet of the on-off switch is elastically deformed by being touched, and at this time, the on-off switch is in a closed state, and the purifier body 100 can be normally powered on to operate. On the contrary, when the snap structure 210 is separated from the snap seat 102, that is, when the protective grille cover 200 is detached from the purifier body 100, the elastic sheet of the on-off switch is elastically deformed, and at this time, the on-off switch is in an off state, so that even if the purifier body 100 is powered on, the purifier body 100 cannot operate, and thus cannot perform the purification operation.
Therefore, through adopting above-mentioned scheme, the on-off switch can be based on whether buckle structure 210 is connected with buckle seat 102 buckle, and realize the break-make fast and accurately to can ensure and improve the performance of on-off switch, thereby can further improve air purifier's performance and safety in utilization.
Referring to fig. 2 and 4, in the present embodiment, the fastening structure 210 includes a first elastic portion 211 connected to the protective grid cover 200 and extending outward and downward, a second elastic portion 212 connected to a lower end of the first elastic portion 211 and extending outward and upward, and a fastening portion 213 connected to an upper end of the second elastic portion 212 and extending outward.
It should be noted that, when the fastening structure 210 is fastened to the fastening seat 102, the first elastic portion 211 and the second elastic portion 212 are substantially not elastically deformed and are accommodated in the fastening seat 102, and the fastening portion 213 is fastened to the edge of the fastening seat 102 stably under the elastic action of the first elastic portion 211 and the second elastic portion 212.
On the contrary, when the buckle connection relationship between the buckle structure 210 and the buckle seat 102 is to be released, the buckle part 213 is broken, so that the first elastic part 211 and the second elastic part 212 are adapted to elastically deform, and the buckle structure 210 can be easily and quickly released from the buckle seat 102.
Therefore, by adopting the above scheme, the convenience of assembling and disassembling the buckle structure 210 and the buckle seat 102 can be improved, and the stability and reliability of the buckle structure 210 and the buckle seat 102 in connection can be improved.
Referring to fig. 1 and 3, in the present embodiment, the purifier body 100 includes a fan 110 and a guiding structure 104 connected between the fan 110 and the air outlet 101, and a cross-sectional dimension of the guiding structure 104 is gradually enlarged in a direction away from the fan 110.
It should be noted that the guiding structure 104 has an extending path from the fan 110 to the air outlet 101, and the cross-sectional dimension of the guiding structure 104 refers to the dimension of the cross-section of the guiding structure 104 perpendicular to the extending path.
Based on this, through adopting above-mentioned scheme, the radiating range of air-purifying is expanded gradually to the guide structure 104 that the accessible expands gradually, based on this, can further improve air purifier's performance, improves air purifier to the purifying effect of air.
Referring to fig. 2, in the present embodiment, the air outlet filter is made of metal.
By adopting the above scheme, on one hand, the structural strength of the air outlet filter screen can be ensured, and the connection strength between the air outlet filter screen and the protective grid cover 200 is improved, so that the air outlet filter screen can basically not deform and is not easy to fall off from the protective grid cover 200 when external sundries fall onto the air outlet filter screen from the cell 201; on the other hand, the air outlet filter screen can be cleaned more conveniently, and the performance is basically not influenced after cleaning; thereby can further ensure and improve the performance of air-out filter screen, guarantee air purifier's performance and life.
Referring to fig. 2, 6 and 7, in the present embodiment, the air outlet 101 is disposed on the upper side of the purifier body 100. Wherein, the upper side is in the aspect of the positive placing state of the air purifier.
Through adopting above-mentioned scheme, air purifier can discharge air-purifying up, based on this, does benefit to and enlarges air-purifying's radiation range, and does benefit to and improves its purifying effect to the air that the user breathed.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims (10)

1. An air purifier, comprising:
the purifier body is provided with an air outlet;
the protective grid cover is detachably covered on the air outlet and provided with a plurality of uniformly distributed unit grids, and the unit grids form ventilation openings communicated with the air outlet;
the air outlet filter screen is detachably connected to the inner side of the protective grid;
wherein, each said vent lies in the filtration range of the said air-out filter screen.
2. The air purifier as claimed in claim 1, wherein the purifier body is provided with a locking seat, and one side of the protective grill cover is connected with a locking structure which can be locked in the locking seat.
3. The air purifier of claim 2, wherein the protective grid cover is provided with at least one plug structure on a side thereof facing away from the snap structure, and the purifier body is provided with a plug socket for plug-fitting with the plug structure.
4. The air purifier of claim 3, wherein there are at least two of the plug structures, each plug structure being disposed on opposite sides of the catch structure.
5. The air purifier as claimed in claim 2, further comprising an on/off switch disposed in the latch seat and electrically connected to the purifier body, wherein the on/off switch is closed when the latch structure is latched to the latch seat and pressed against the latch seat, and is opened when the latch structure is not latched to the latch seat, and the on/off switch can limit the operation of the purifier body when the latch structure is opened.
6. The air purifier of claim 5 wherein the on/off switch is a micro switch.
7. The air cleaner of claim 2, wherein the snap structure comprises a first elastic part connected to the protective grill cover and extending outward and downward, a second elastic part connected to a lower end of the first elastic part and extending outward and upward, and a snap part connected to an upper end of the second elastic part and extending outward.
8. The air purifier of claim 1, wherein the purifier body comprises a fan, and a guide structure communicating between the fan and the outlet, the guide structure having a cross-sectional dimension that diverges in a direction away from the fan.
9. The air purifier of any one of claims 1-8, wherein the vent screen is a vent screen made of metal.
10. The air cleaner of any one of claims 1-8, wherein the air outlet is disposed at an upper side of the cleaner body.
CN202023040114.9U 2020-12-16 2020-12-16 Air purifier Active CN214746276U (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202023040114.9U CN214746276U (en) 2020-12-16 2020-12-16 Air purifier
AU2021100204A AU2021100204A4 (en) 2020-12-16 2021-01-13 Air purifier
AU2021100205A AU2021100205A4 (en) 2020-12-16 2021-01-13 Air purifier
AU2021100203A AU2021100203A4 (en) 2020-12-16 2021-01-13 Air purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023040114.9U CN214746276U (en) 2020-12-16 2020-12-16 Air purifier

Publications (1)

Publication Number Publication Date
CN214746276U true CN214746276U (en) 2021-11-16

Family

ID=75280471

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023040114.9U Active CN214746276U (en) 2020-12-16 2020-12-16 Air purifier

Country Status (2)

Country Link
CN (1) CN214746276U (en)
AU (3) AU2021100203A4 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113280447A (en) * 2021-04-29 2021-08-20 陈雅丽 Household air purifier

Also Published As

Publication number Publication date
AU2021100205A4 (en) 2021-04-15
AU2021100203A4 (en) 2021-04-08
AU2021100204A4 (en) 2021-04-15

Similar Documents

Publication Publication Date Title
CN214746276U (en) Air purifier
CN215260170U (en) Air conditioner
JP2003240328A (en) Air conditioner
JP3321445B2 (en) Filter body and filter body mounting device for air conditioner
CN216308116U (en) Air purification device and air conditioner
CN217503839U (en) Air conditioning apparatus
CN209955694U (en) Novel automobile air blower
CN219674453U (en) Air conditioner and inner machine filter screen assembly fool-proof structure thereof
CN214501678U (en) Casing assembly, air treatment device and air conditioner
CN214595707U (en) Dust collector and dust collector air duct structure
CN215571161U (en) Machine in IFD filter screen subassembly and air conditioning
CN218511011U (en) Electrostatic filter and air purification equipment
CN217817075U (en) Wall-mounted air conditioner indoor unit
CN218763850U (en) Air purifying equipment
CN215260120U (en) Indoor unit of air conditioner
CN215909366U (en) Air treatment device and air conditioner
CN217560045U (en) Filter screen subassembly and air treatment unit
CN216346651U (en) Fresh air filtering component for air conditioner and air conditioner with fresh air filtering component
JP2006305447A (en) Electric dust collecting unit
CN115507440A (en) Air conditioner
CN214038640U (en) Air conditioner indoor unit and air conditioner
CN213472710U (en) Parking air conditioner outdoor unit
CN220062030U (en) Filter screen easy to detach and air conditioner
CN213375561U (en) Air purifier
CN211119781U (en) Electrostatic air conditioner air pipe purifying device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant