CN114413581A - Negative pressure type drying machine - Google Patents
Negative pressure type drying machine Download PDFInfo
- Publication number
- CN114413581A CN114413581A CN202210129946.2A CN202210129946A CN114413581A CN 114413581 A CN114413581 A CN 114413581A CN 202210129946 A CN202210129946 A CN 202210129946A CN 114413581 A CN114413581 A CN 114413581A
- Authority
- CN
- China
- Prior art keywords
- guide hole
- negative pressure
- box body
- hole
- sealing
- 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.)
- Pending
Links
- 238000001035 drying Methods 0.000 title description 14
- 238000007789 sealing Methods 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000007664 blowing Methods 0.000 claims description 14
- 239000013013 elastic material Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 238000005406 washing Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 7
- 241000411851 herbal medicine Species 0.000 description 6
- 239000003814 drug Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229940126680 traditional chinese medicines Drugs 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/02—Biomass, e.g. waste vegetative matter, straw
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a negative pressure type dryer, which comprises a box body, a door body, an air duct, a liquid inlet pipe and a sealing disc, wherein: the box body is provided with an accommodating groove, and the door body is arranged on the box body and used for sealing the accommodating groove; the box body is provided with a gas guide hole and a liquid guide hole, and the liquid guide hole and the gas guide hole are both communicated with the holding tank; the liquid inlet pipe and the gas guide pipe are both arranged on the box body and are respectively communicated with the liquid guide hole and the gas guide hole; the sealing disc is detachably arranged on the box body and used for sealing the air guide hole or the liquid guide hole; when wasing, seal the air guide hole with the closing disc, can wash the box holding tank at the equipment such as rotation shower nozzle of drain hole department connection prior art, and gather closed air guide hole at the cleaning process, avoid in washing liquid enters into air duct and air guide hole, and then be convenient for wash the box.
Description
Technical Field
The invention relates to the technical field of traditional Chinese medicine drying equipment, in particular to a negative pressure type dryer.
Background
Most of the collected traditional Chinese medicines are fresh and dried by airing, the drying time is long, and the primarily aired medicinal materials are fully dried by a negative pressure type dryer generally. The interior of the box body generally needs to be cleaned regularly in the process of using the negative pressure type drying machine, the existing method is a water flushing mode, but the box body is connected with the air duct, so that water is easy to be stored at the joint of the box body and the air duct, and the drying efficiency of reusing the drying machine is further influenced.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a negative pressure type dryer.
The invention provides a negative pressure type dryer, which comprises a box body, a door body, an air duct, a liquid inlet pipe and a sealing disc, wherein:
the box body is provided with an accommodating groove, and the door body is arranged on the box body and used for sealing the accommodating groove;
the box body is provided with a gas guide hole and a liquid guide hole, and the liquid guide hole and the gas guide hole are both communicated with the holding tank;
the liquid inlet pipe and the gas guide pipe are both arranged on the box body and are respectively communicated with the liquid guide hole and the gas guide hole;
the sealing disc is detachably arranged on the box body and used for sealing the air guide hole or the liquid guide hole;
when wasing, seal the air guide hole with the closing disc, can wash the box holding tank at the equipment such as rotation shower nozzle of drain hole department connection prior art, and gather closed air guide hole at the cleaning process, avoid in washing liquid enters into air duct and air guide hole, and then be convenient for wash the box.
As a further optimized scheme of the invention, the dryer further comprises a three-way pipe, the three-way pipe is arranged on the air guide pipe, the three-way pipe is also connected with a negative pressure pipe and an air blowing pipe, when the dryer is washed by water, some Chinese herbal medicine impurities are adsorbed on the inner wall of the box body of the dryer for drying the Chinese herbal medicines, and the Chinese herbal medicine fragments can be separated from the inner wall of the box body by blowing air into the air blowing pipe, so that the cleaning efficiency of the dryer is improved.
As a further optimized scheme of the invention, the negative pressure tube and the air blowing tube are respectively provided with a first valve and a second valve.
As a further optimized scheme of the invention, the lower half part of the box body is provided with a water guide cavity, the box body is provided with a water outlet, the water outlet is communicated with the water guide cavity, the bottom surface of the accommodating groove is provided with a water discharging hole, and the water discharging hole is used for communicating the accommodating groove and the water guide cavity, so that cleaning liquid can be conveniently discharged during cleaning.
As a further optimized scheme of the invention, the supporting piece is detachably arranged on the box body and used for blocking the drain hole, so that Chinese herbal medicines in the accommodating groove are prevented from entering the drain hole in the drying process.
As a further optimized solution of the present invention, the supporting member may be made of an elastic material such as rubber in the prior art.
As a further optimized scheme of the invention, the drying box further comprises a tray, the tray is detachably arranged on the box body, the lower surface of the tray is abutted to the supporting piece, so that the Chinese herbal medicine is conveniently dried, and in order to further increase the effect, the supporting piece is in a compressed state when the tray is arranged on the box body.
As a further optimized scheme of the invention, the supporting piece is provided with a through hole, the lower end of the through hole is communicated with the drain hole, and the tray seals the other end of the through hole, so that the service life of the supporting piece is prolonged.
As a further optimized scheme of the invention, the box body is also provided with an air pressure balance channel, the air pressure balance channel is used for communicating the accommodating groove with the water guide cavity, and one end of the air pressure balance channel is preferably communicated with the air guide hole, so that the pressure intensity of the water guide cavity is equal to the pressure intensity in the accommodating groove, and the stability of the tray is improved.
As a further optimized scheme of the invention, the sealing disc is provided with a sealing ring, the box body is provided with a first sealing ring groove and a second sealing ring groove, the first sealing ring groove and the second sealing ring groove respectively coat the outer sides of the gas guide hole and the liquid guide hole, and the sealing ring is matched with the first sealing ring groove or the second sealing ring groove to increase the sealing of the sealing disc on the liquid guide hole or the gas guide hole.
The negative pressure type dryer provided by the invention has a simple structure, and through the arrangement of the air guide holes, the liquid guide holes and the sealing disc, when the dryer dries, the sealing disc seals the liquid guide holes, and when the dryer cleans, the sealing disc seals the air guide holes so as to be convenient for cleaning the box body.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the disassembled tray of the present invention;
FIG. 3 is a partial cross-sectional view of the present invention;
FIG. 4 is an enlarged view of a portion of the area A according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
A negative pressure formula desiccator as shown in fig. 1-4, including box 1, door body 2, air duct 3, feed liquor pipe 4, closing disc 5, tray 6, support piece 7, three-way pipe 8, negative pressure pipe 9, blast pipe 11, first valve 12 and second valve 13, wherein:
the box body 1 is provided with an accommodating groove 10, a notch of the accommodating groove 10 is positioned on one side surface of the box body 1, the door body 2 is arranged on the box body 1 and used for sealing the accommodating groove 10, and the box body 1 and the accommodating groove 10 form a drying cavity;
as in the prior art, a heating element may be disposed in the accommodating groove 10 of the box 1, and the heating element may be an electric heating wire or an electric heating plate or the like capable of heating the drying chamber;
the box body 1 is provided with a gas guide hole 100 and a liquid guide hole 101, and the liquid guide hole 101 and the gas guide hole 100 are both communicated with the accommodating groove 10;
the sealing disc 5 is detachably arranged on the box body 1, and the sealing disc 5 is used for sealing the air guide hole 100 or the liquid guide hole 101;
specifically, the closed disk 5 is arranged on the box body 1 in a clamping manner;
specifically, the sealing disc 5 is a disc-shaped material made of rubber or other elastic materials, in order to further increase the clamping effect and the sealing effect, the sealing disc 5 is provided with a sealing ring 50, the box body 1 is provided with a first sealing ring groove 102 and a second sealing ring groove 103, the first sealing ring groove 102 and the second sealing ring groove 103 are respectively coated on the outer sides of the air guide hole 100 and the liquid guide hole 101, and the sealing ring 50 is matched with the first sealing ring groove 102 or the second sealing ring groove 103;
a liquid inlet valve (not shown) is arranged on the liquid inlet pipe 4;
the three-way pipe 8 is communicated with the gas guide pipe 3, and the other two ports of the three-way pipe 8 are respectively communicated with the negative pressure pipe 9 and the gas blowing pipe 11; the first valve 12 and the second valve 13 are respectively arranged on the negative pressure pipe 9 and the air blowing pipe 11;
the lower half part of the box body 1 is provided with a water guide cavity 106, the box body 1 is provided with a water outlet 104, the water outlet 104 is communicated with the water guide cavity 106, the water outlet 104 is provided with a sealing piece or a water guide valve, and the water outlet 104 in the embodiment is provided with a sealing plug;
the bottom surface of the accommodating groove 10 of the box body 1 is provided with a plurality of drain holes 105, the drain holes 105 are used for communicating the accommodating groove 10 with the water guide cavity 106, and water in the accommodating groove 10 enters the water guide cavity 106 through the drain holes 105 and is drained through the drain outlet 104;
the tray 6 is detachably mounted in the accommodating groove 10, specifically, the tray 6 is mounted in the accommodating groove 10 in a clamping manner, a clamping groove 108 is formed in the accommodating groove 10, the tray 6 is detachably mounted in the clamping groove 108, the tray 6 is horizontally placed, and the tray 6 is used for placing Chinese herbal medicines with dryness;
specifically, the supporting member 7 is made of elastic materials such as rubber, the supporting member 7 is provided with a plurality of supporting members 7, one supporting member 7 is opposite to one water drainage hole 105, the supporting member 7 is detachably installed between the tray 6 and the box body 1, the supporting member 7 is arranged to prevent the gas in the accommodating groove 10 from entering the water guide cavity 106 through the water drainage hole 105, the supporting member 7 is clamped between the water drainage hole 104 and the tray 6, and when the tray 6 is installed on the box body 1, the supporting member 7 is in a compressed state;
in order to increase the fixing effect of the support 7, the support 7 can be clamped with the inner bottom surface of the box body 1 (not shown in the figure);
in order to increase the stability of the connection between the tray 6 and the box body 1, in this embodiment, it is preferable that the box body 1 is further provided with an air pressure balancing channel 107, the air pressure balancing channel 107 is used for communicating the accommodating groove 10 with the water guide cavity 106, the supporting member 7 is provided with a through hole 70, an opening below the through hole 70 is communicated with the drain hole 105, and an opening above the through hole 70 is sealed by the tray 6;
preferably, the aperture of the through hole 70 is smaller than that of the drain hole 105;
preferably, the air pressure equalizing passage 107 is directly communicated with the air guide hole 100.
In the working process of the embodiment: when the traditional Chinese medicine is dried, firstly, the door body 2 is opened, the support piece 7 is placed on the inner bottom surface of the box body 1, the lower bottom surface of the support piece 7 is in contact with the inner bottom surface of the box body 1, the water discharge hole 105 of the support piece 7 is communicated with an opening below the through hole 70 of the support piece 7, then the tray 6 is pressed against the support piece 7 and clamped on the box body 1, the upper opening of the through hole 70 of the support piece 7 is sealed by the tray 6, the sealing disc 5 is installed in the box body 1, the liquid guide hole 101 is sealed by the sealing disc 5, then the traditional Chinese medicine to be dried is placed on the tray 6, the door body 2 is closed, the first valve 12 is opened, the second valve 13 is closed, the heating piece is opened, the negative pressure equipment is used for carrying out negative pressure and heating treatment on the drying cavity, and further drying of the traditional Chinese medicine is realized;
after the traditional Chinese medicines are dried, the negative pressure equipment and the heating element are closed, and the door body 2 is opened to take out the traditional Chinese medicines;
when the box body 1 needs to be cleaned; firstly, closing the door body 2, closing the first valve 12, opening the second valve 13, blowing gas into the blowing pipe 11 through the blowing equipment, blowing the sundries in the heating cavity by the gas in the blowing pipe 11 to enable the sundries to be accumulated on the tray 6, then closing the blowing equipment, opening the door body 2 to clean the sundries on the tray 6, then detaching the tray 6 to clean the tray 6 independently, taking out the supporting piece 7, installing the sealing disc 5 in the box body 1 to enable the sealing disc 5 to touch the air guide hole 100, connecting a spray head in the prior art with the liquid inlet hole, closing the door body 2, introducing cleaning liquid into the liquid inlet pipe 4, cleaning the inner wall of the box body 1 by the cleaning liquid, enabling the liquid to flow to the water guide cavity 106 under the action of self gravity and flow out from the water outlet 104, and further facilitating the cleaning of the box body 1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a negative pressure formula desiccator which characterized in that, includes box, the door body, air duct, feed liquor pipe and closing disc, wherein:
the box body is provided with an accommodating groove, and the door body is arranged on the box body and used for sealing the accommodating groove;
the box body is provided with a gas guide hole and a liquid guide hole, and the liquid guide hole and the gas guide hole are both communicated with the holding tank;
the liquid inlet pipe and the gas guide pipe are both arranged on the box body and are respectively communicated with the liquid guide hole and the gas guide hole;
the sealing disc is detachably arranged on the box body and used for sealing the air guide hole or the liquid guide hole.
2. The negative pressure dryer of claim 1, further comprising a three-way pipe, wherein the three-way pipe is mounted on the air duct, and the three-way pipe is further connected with the negative pressure pipe and the air blowing pipe.
3. The negative pressure dryer of claim 2, further comprising a first valve and a second valve disposed on the negative pressure tube and the air blowing tube, respectively.
4. The negative pressure dryer as claimed in any one of claims 1 to 3, wherein the lower half of the housing has a water guiding chamber, the housing has a water outlet, the water outlet is communicated with the water guiding chamber, and the bottom surface of the accommodating groove has a water discharging hole for communicating the accommodating groove with the water guiding chamber.
5. The negative pressure dryer as claimed in claim 4, further comprising a support member detachably mounted on the cabinet, the support member being adapted to block the drain hole.
6. The negative pressure dryer of claim 5, wherein the support member is made of an elastic material.
7. The negative pressure type dryer as claimed in claim 5 or 6, further comprising a tray detachably mounted on the cabinet, and a lower surface of the tray is abutted with the supporting member.
8. The negative pressure type dryer as claimed in claim 7, wherein the support member is formed with a through hole, a lower end of the through hole is communicated with the drain hole, and the tray closes the other end of the through hole.
9. The negative pressure dryer as claimed in claim 8, wherein the cabinet further comprises an air pressure balance passage for communicating the receiving groove with the water guide chamber.
10. The negative pressure type dryer of claim 1, wherein the sealing disc is provided with a sealing ring, the box body is provided with a first sealing ring groove and a second sealing ring groove, the first sealing ring groove and the second sealing ring groove respectively cover the outer sides of the air guide hole and the liquid guide hole, and the sealing ring is matched with the first sealing ring groove or the second sealing ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210129946.2A CN114413581A (en) | 2022-02-11 | 2022-02-11 | Negative pressure type drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210129946.2A CN114413581A (en) | 2022-02-11 | 2022-02-11 | Negative pressure type drying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114413581A true CN114413581A (en) | 2022-04-29 |
Family
ID=81279352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210129946.2A Pending CN114413581A (en) | 2022-02-11 | 2022-02-11 | Negative pressure type drying machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114413581A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR830004584A (en) * | 1980-07-10 | 1983-07-13 | 노부요시 구보야마 | Decompression balanced heating method and device |
| CA2286102A1 (en) * | 1997-04-09 | 1998-10-15 | Mafac Ernst Schwarz Gmbh & Co. Kg. | Device and method for cleaning or drying work pieces |
| CN104682316A (en) * | 2013-12-02 | 2015-06-03 | 国家电网公司 | Plugging head for tube mouth of power cable protective tube |
| CN205351970U (en) * | 2016-02-02 | 2016-06-29 | 哈尔滨商业大学 | Vacuum drying oven |
| CN107796175A (en) * | 2016-08-31 | 2018-03-13 | 四川飚毅中药材科技有限公司 | A kind of vacuum root of herbaceous peony drying box |
| CN108458556A (en) * | 2018-04-03 | 2018-08-28 | 南京高昇消防药剂有限公司 | Vacuum drying chamber |
| CN108856123A (en) * | 2018-07-13 | 2018-11-23 | 连云港佑源医药设备制造有限公司 | One kind being suitable for Chinese medicine Low-temperature cleaning device and method |
| CN208269514U (en) * | 2018-01-05 | 2018-12-21 | 天津藤兴生物科技有限公司 | A kind of vacuum drier |
| CN208567311U (en) * | 2018-07-03 | 2019-03-01 | 天水华圆医疗器械有限公司 | A kind of Chinese medicine vacuum sterilization drying system |
| CN210532854U (en) * | 2019-06-05 | 2020-05-15 | 超威电源集团有限公司 | Automatic drainage type vacuum drying oven |
| CN211977453U (en) * | 2019-12-25 | 2020-11-20 | 天津沃川水处理工程技术有限公司 | Drying equipment is used in production of chemical industry cleaner |
-
2022
- 2022-02-11 CN CN202210129946.2A patent/CN114413581A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR830004584A (en) * | 1980-07-10 | 1983-07-13 | 노부요시 구보야마 | Decompression balanced heating method and device |
| CA2286102A1 (en) * | 1997-04-09 | 1998-10-15 | Mafac Ernst Schwarz Gmbh & Co. Kg. | Device and method for cleaning or drying work pieces |
| CN104682316A (en) * | 2013-12-02 | 2015-06-03 | 国家电网公司 | Plugging head for tube mouth of power cable protective tube |
| CN205351970U (en) * | 2016-02-02 | 2016-06-29 | 哈尔滨商业大学 | Vacuum drying oven |
| CN107796175A (en) * | 2016-08-31 | 2018-03-13 | 四川飚毅中药材科技有限公司 | A kind of vacuum root of herbaceous peony drying box |
| CN208269514U (en) * | 2018-01-05 | 2018-12-21 | 天津藤兴生物科技有限公司 | A kind of vacuum drier |
| CN108458556A (en) * | 2018-04-03 | 2018-08-28 | 南京高昇消防药剂有限公司 | Vacuum drying chamber |
| CN208567311U (en) * | 2018-07-03 | 2019-03-01 | 天水华圆医疗器械有限公司 | A kind of Chinese medicine vacuum sterilization drying system |
| CN108856123A (en) * | 2018-07-13 | 2018-11-23 | 连云港佑源医药设备制造有限公司 | One kind being suitable for Chinese medicine Low-temperature cleaning device and method |
| CN210532854U (en) * | 2019-06-05 | 2020-05-15 | 超威电源集团有限公司 | Automatic drainage type vacuum drying oven |
| CN211977453U (en) * | 2019-12-25 | 2020-11-20 | 天津沃川水处理工程技术有限公司 | Drying equipment is used in production of chemical industry cleaner |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220429 |