CN112718362B - Water mist generating assembly and water mist generating method - Google Patents
Water mist generating assembly and water mist generating method Download PDFInfo
- Publication number
- CN112718362B CN112718362B CN202011580014.7A CN202011580014A CN112718362B CN 112718362 B CN112718362 B CN 112718362B CN 202011580014 A CN202011580014 A CN 202011580014A CN 112718362 B CN112718362 B CN 112718362B
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- Prior art keywords
- water mist
- liquid
- pipe body
- cavity
- holes
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000003595 mist Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title description 8
- 239000007788 liquid Substances 0.000 claims abstract description 88
- 238000005507 spraying Methods 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 239000006185 dispersion Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000645 desinfectant Substances 0.000 description 8
- 238000004659 sterilization and disinfection Methods 0.000 description 7
- 230000001954 sterilising effect Effects 0.000 description 6
- 238000005187 foaming Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
- A61M11/02—Sprayers or atomisers specially adapted for therapeutic purposes operated by air or other gas pressure applied to the liquid or other product to be sprayed or atomised
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M35/00—Devices for applying media, e.g. remedies, on the human body
- A61M35/20—Non-portable devices, e.g. spraying booths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Nozzles (AREA)
- Devices For Medical Bathing And Washing (AREA)
Abstract
The application discloses a water mist generating component, which is characterized by comprising the following components: the liquid diversion structure comprises a substrate, a water mist generation cavity and spray holes corresponding to the positions of the water mist generation cavity are arranged on the substrate, and a plurality of diversion channels communicated with the spray holes are arranged on the water mist generation cavity; the liquid dispersing structure comprises a pipe body with a closed lower end, and a plurality of liquid dispersing holes are formed in the lower end of the pipe body; the pipe body is positioned on the substrate, the lower end of the pipe body corresponds to the position of the liquid inlet of the water mist generating cavity, a cavity is formed between the lower end face of the pipe body and the inner bottom face of the water mist generating cavity, and liquid entering the pipe body under the action of pressure is discharged through the liquid dispersing holes, the cavity, the diversion channel and the spraying holes to form water mist. The water mist generating component is simple in structure and is of an integrated structure, so that the water mist generating component is convenient to assemble and disassemble, the efficiency of water mist generation is high, and the generated water mist effect is good.
Description
Technical Field
The application relates to the technical field of liquid converted into water mist for discharge, in particular to a water mist generating assembly and a water mist generating method.
Background
Personnel in public places such as hospitals often need to disinfect hands, prevent the transmission and mutual cross infection of virus, the disinfection bottle of push type is commonly adopted in public places such as hospitals at present to disinfect, however the user goes out liquid and disinfects after pressing the disinfection bottle, consequently, the disinfection bottle receives the infection at the push type easily, make the requirement of medical staff's convenience in the disinfection process can not be satisfied well by the disinfection bottle of push type, thereby delay disinfection time, bring very big work degree of difficulty for medical staff, the people have developed an automatic disinfectant outlet disinfectant machine in view of above-mentioned defect, its drawing of liquid pump is through the transfer line with the disinfectant in the disinfection bottle pump to spray head department with the water vaporific blowout for the user to disinfect, however present atomising head structure is complicated, the dismouting is inconvenient to change.
Disclosure of Invention
The application aims to solve the defects of the technology, and provides a water mist generating assembly and a water mist generating method, which are simple in structure, convenient to assemble, disassemble and replace and good in spraying effect.
The application relates to a water mist generating component, which comprises:
the liquid diversion structure comprises a substrate, a water mist generation cavity and spray holes corresponding to the positions of the water mist generation cavity are arranged on the substrate, and a plurality of diversion channels communicated with the spray holes are arranged on the water mist generation cavity;
the liquid dispersing structure comprises a pipe body with a closed lower end, and a plurality of liquid dispersing holes are formed in the lower end of the pipe body;
the pipe body is positioned on the substrate, the lower end of the pipe body corresponds to the position of the liquid inlet of the water mist generating cavity, a cavity is formed between the lower end face of the pipe body and the inner bottom face of the water mist generating cavity, and liquid entering the pipe body under the action of pressure is discharged through the liquid dispersing holes, the cavity, the diversion channel and the spraying holes to form water mist.
Preferably, the plurality of liquid dispersing holes are arranged in an annular array on the inner wall of the lower end of the pipe body or on the inner side surface of the closed portion of the lower end of the pipe body.
Preferably, a plurality of through holes which are respectively communicated with the liquid dispersion holes on the inner wall of the lower end of the pipe body are arranged at the edge of the lower end face of the pipe body, and the plurality of through holes are arranged in an annular array.
Preferably, the lower end of the tube is inserted into the water mist generating chamber, and the outer peripheral side surface of the lower end of the tube is attached to the inner wall of the water mist generating chamber.
Preferably, the bottom surface of the upper end of the spray hole is provided with an arc surface protruding downwards.
Preferably, the inner bottom surface of the water mist generating cavity is provided with positioning grooves respectively communicated with the spray holes and the diversion channels, the outer side surface of the lower end sealing part of the pipe body is provided with positioning columns corresponding to the positions of the positioning grooves, the positioning columns are correspondingly inserted into the positioning grooves, the outer peripheral side surfaces of the positioning columns are attached to the inner walls of the positioning grooves, the opening parts of the diversion channels communicated with the positioning grooves are blocked, and the lower end surfaces of the positioning columns are provided with arc surfaces protruding downwards.
Preferably, the lower port diameter of the spray orifice is smaller than the inner diameter of the spray orifice.
Preferably, the lower section of the spray hole is a conical hole, and the diameter of the lower port of the conical hole is smaller than that of the upper port.
Preferably, the plurality of diversion channels are arranged in an annular array, and the inner side end of the outer side inner wall of each diversion channel is tangent to the spraying hole.
Preferably, the base body is provided with a positioning ring groove at the position of the upper port of the water mist generating cavity, and the pipe body is provided with a positioning ring body which is fixed in the positioning ring groove.
As another aspect, a water mist generating method is characterized by comprising the specific steps of:
liquid enters the pipe body under the action of pressure, and the liquid in the pipe body is respectively dispersed into the cavity of the liquid diversion structure through a plurality of liquid dispersion holes;
the liquid in the cavity is discharged through the plurality of diversion channels rapidly under the action of liquid pressure, and the liquid discharged from the diversion channels rapidly flows to the lower port of the spraying hole to be discharged in a spiral mode according to the inner wall of the spraying hole, however, the liquid is instantaneously dispersed to form water mist for a user to use during discharging.
The water mist generating component and the water mist generating method have the advantages that the water mist generating component is simple in structure and is of an integrated structure, so that the water mist generating component is convenient to assemble and disassemble, the efficiency of generating water mist is high, and the generated water mist effect is good.
Drawings
FIG. 1 is a schematic structural view (I) of a foaming device;
FIG. 2 is a schematic structural view of a foaming device (II);
FIG. 3 is an exploded view of the foaming device;
FIG. 4 is an exploded view of the foaming device (II);
FIG. 5 is an exploded view (III) of the foaming device;
fig. 6 is a schematic diagram of a construction of a hand sanitizer machine.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application. Examples:
as shown in the drawings, the water mist generating assembly described in the embodiment comprises a liquid diversion structure 1 and a liquid dispersion structure 2, wherein the liquid diversion structure 1 comprises a base body 11, a water mist generating cavity 12 and spray holes 14 corresponding to the positions of the water mist generating cavity 12 are arranged on the base body 11, and a plurality of diversion channels 122 communicated with the spray holes 14 are arranged on the water mist generating cavity 12; the liquid dispersion structure 2 comprises a tube body 21 with a closed lower end, and a plurality of liquid dispersion holes 22 are arranged at the lower end of the tube body 21; wherein, the tube body 21 is positioned on the basal body 11, the lower end of the tube body 21 corresponds to the position of the liquid inlet port of the water mist generating cavity 12, a cavity 121 is arranged between the lower end surface of the tube body 21 and the inner bottom surface of the water mist generating cavity 12, the tube body 21 is connected and communicated with the liquid outlet end of a liquid suction pump of the sterilizing liquid machine through a connecting pipe, the liquid inlet end of a liquid suction pump 102 of the sterilizing liquid machine 100 is connected and communicated with a sterilizing liquid bottle 101 storing sterilizing liquid through a connecting pipe, the sterilizing liquid in the sterilizing liquid bottle 101 is pumped out by the liquid suction pump 102 and discharged into the tube body 21, so that liquid entering the tube body under the action of the liquid suction pressure of the liquid suction pump forms water mist through liquid dispersion holes, the cavity, a flow guide channel and spray holes and is discharged; the plurality of diversion channels are distributed in an annular array, and the inner side end of the inner side wall of the outer side of each diversion channel is tangent to the spraying hole, so that water entering the spraying hole flows in a spiral rotation mode along the inner side of the spraying hole, and when reaching the lower port of the spraying hole, the water is scattered to form water mist.
In the present embodiment, the plurality of liquid dispersion holes 22 are provided in an annular array on the inner wall of the lower end of the pipe body 11, and when the lower end of the pipe body 11 is inserted into the mist generating chamber 12, a gap must exist between the outer peripheral side surface of the lower end of the pipe body 11 and the mist generating chamber 12, so that the plurality of liquid dispersion holes discharge liquid into the cavity through the gap, wherein the number of liquid dispersion holes is six.
In another embodiment, the plurality of liquid dispersing holes 22 are disposed in an annular array on the inner side of the lower end closing portion 24 of the tube 21, and when the lower end of the tube 21 is inserted into the water mist generating cavity 12, the outer peripheral side of the lower end of the tube 21 may be attached to the inner wall of the water mist generating cavity 12, so that the liquid is discharged into the cavity 121 in a dispersed manner through the liquid dispersing holes 22 of the lower end closing portion 24 of the tube 21, wherein the number of the liquid dispersing holes is six.
In another embodiment, a plurality of through holes 221 are formed at the edge of the lower end surface of the tube 21 and are respectively communicated with the liquid dispersion holes 22 on the inner wall of the lower end of the tube 21, and the plurality of through holes 221 are arranged in a ring-shaped array, when the lower end of the tube 21 is inserted into the water mist generating cavity 12, the outer peripheral side surface of the lower end of the tube 21 can be attached to the inner wall of the water mist generating cavity 12, and the structure is arranged to increase the size of each liquid dispersion hole 22, so that the liquid discharge amount is increased, the spraying efficiency is higher, and the purpose of rapidly discharging liquid into the cavity is achieved, wherein the number of the liquid dispersion holes and the through holes is six.
In this embodiment, the bottom surface of the upper end of the spraying hole 14 is provided with a downward protruding arc surface 231, which ensures that the cross section of the diversion channel 122 forms a closed loop to achieve the best spraying effect, and reduces the requirements on the production process, and improves the productivity and qualification rate.
Further, the inner bottom surface of the water mist generating cavity 12 is provided with a positioning groove 15 which is respectively communicated with the spray hole 14 and the flow guide channel 122, the outer side surface of the lower end sealing part 24 of the pipe body 21 is provided with a positioning column 23 corresponding to the positioning groove 15, the positioning column 23 is correspondingly inserted into the positioning groove 15, the outer peripheral side surface of the positioning column 23 is attached to the inner wall of the positioning groove 15, the opening part of the flow guide channel 122 which is communicated with the positioning groove 15 is blocked (the opening part of the flow guide channel 122 which is communicated with the spray hole 14 is not blocked), the lower end surface of the positioning column 23 is provided with a downward protruding arc surface 231, the structure of the positioning column is used for enabling the pipe body to be reliably positioned, and the downward protruding arc surface, the spray hole, the water mist generating cavity and the positioning ring groove are easier to be molded, so that the manufacturing is facilitated.
In this embodiment, the lower section of the spraying hole 14 is a tapered hole 141, and the diameter of the lower port of the tapered hole is smaller than the diameter of the upper port, so that the diameter of the lower port of the spraying hole is smaller than the inner diameter of the spraying hole, which pressurizes the water mist to achieve the effect that the water mist is sprayed on the hands of a human body with higher efficiency and is mixed with a certain pressure, thereby improving the use effect.
In this embodiment, the base 11 has a positioning ring groove 13 at the position of the upper port of the water mist generating cavity 12, and the tube 21 is provided with a positioning ring 25, the positioning ring 25 is fixed in the positioning ring groove 13, where the positioning ring 25 is fixed with the inner wall of the positioning ring groove 13 by ultrasonic welding, so that the fixing of the positioning ring 25 is firm and reliable, and the base 11 can also be provided with a positioning hole, so that the base can be fixedly connected with the disinfectant through the positioning hole.
As another embodiment, the water mist generating assembly is applied to a disinfectant fluid machine, and specifically includes the following steps:
the liquid pump pumps out the disinfectant in the disinfectant bottle and discharges the disinfectant into the pipe body, so that the liquid in the pipe body enters the pipe body under the action of pressure, and the liquid in the pipe body enters the cavity of the liquid diversion structure in a dispersed manner through a plurality of liquid dispersion holes respectively; the method has the advantages that the liquid flow can be reduced, the liquid flowing direction is changed, and the liquid is buffered under the condition that the pressure (liquid pump) is unchanged in advance, so that the water mist spraying effect of the spray head is further effectively improved, and the service performance is improved.
The liquid in the cavity is discharged through the plurality of diversion channels rapidly under the action of liquid pressure, and the liquid discharged from the diversion channels rapidly flows to the lower port of the spraying hole to be discharged in a spiral mode according to the inner wall of the spraying hole, however, the liquid is instantaneously dispersed to form water mist for a user to use during discharging.
The present application is not limited to the above-mentioned preferred embodiments, and any person who can obtain other various products under the teaching of the present application can make any changes in shape or structure, and all the technical solutions that are the same or similar to the present application fall within the scope of the present application.
Claims (5)
1. A water mist generating assembly, comprising:
the liquid diversion structure comprises a substrate, a water mist generation cavity and spray holes corresponding to the positions of the water mist generation cavity are arranged on the substrate, and a plurality of diversion channels communicated with the spray holes are arranged on the water mist generation cavity;
the liquid dispersing structure comprises a pipe body with a closed lower end, and a plurality of liquid dispersing holes are formed in the lower end of the pipe body;
the pipe body is positioned on the substrate, the lower end of the pipe body corresponds to the position of the liquid inlet port of the water mist generation cavity, a cavity is formed between the lower end surface of the pipe body and the inner bottom surface of the water mist generation cavity, and liquid entering the pipe body under the action of pressure forms water mist through the liquid dispersion holes, the cavity, the diversion channel and the spraying holes and is discharged;
the inner bottom surface of the water mist generation cavity is provided with a positioning groove which is respectively communicated with the spray hole and the diversion channel, the outer side surface of the lower end sealing part of the pipe body is provided with a positioning column corresponding to the positioning groove, the positioning column is correspondingly inserted into the positioning groove, the outer peripheral side surface of the positioning column is attached to the inner wall of the positioning groove, the opening part of the diversion channel which is communicated with the positioning groove is blocked, and the lower end surface of the positioning column is provided with an arc surface which protrudes downwards;
the plurality of diversion channels are arranged in an annular array, and the inner side end of the outer side inner wall of each diversion channel is tangent to the spraying hole; the lower section of the spray hole is a conical hole, and the diameter of the lower port of the conical hole is smaller than that of the upper port;
liquid enters the pipe body under the action of pressure, and the liquid in the pipe body is respectively dispersed into the cavity of the liquid diversion structure through a plurality of liquid dispersion holes; the liquid in the cavity is discharged through the plurality of diversion channels rapidly under the action of liquid pressure, and the liquid discharged from the diversion channels rapidly flows to the lower port of the spraying hole to be discharged in a spiral mode according to the inner wall of the spraying hole, however, the liquid is instantaneously dispersed to form water mist for a user to use during discharging.
2. A water mist generating assembly as recited in claim 1, wherein the plurality of liquid dispersion holes are disposed in an annular array on an inner wall of the lower end of the tube or an inner side of the lower end closure of the tube.
3. A water mist generating assembly as recited in claim 2, wherein a plurality of through holes are provided at the edge of the lower end face of the tube body, the through holes being respectively communicated with the liquid dispersion holes on the inner wall of the lower end of the tube body, and the plurality of through holes are arranged in an annular array.
4. A water mist generating assembly as recited in claim 3, wherein the lower end of the tube is inserted into the water mist generating chamber and the peripheral side of the lower end of the tube engages the inner wall of the water mist generating chamber.
5. A water mist generating assembly as claimed in any of claims 1 to 4, wherein the base body has a locating ring groove at the upper end opening of the water mist generating chamber, and the tube body has a locating ring body, the locating ring body being fixed in the locating ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011580014.7A CN112718362B (en) | 2020-12-28 | 2020-12-28 | Water mist generating assembly and water mist generating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011580014.7A CN112718362B (en) | 2020-12-28 | 2020-12-28 | Water mist generating assembly and water mist generating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112718362A CN112718362A (en) | 2021-04-30 |
| CN112718362B true CN112718362B (en) | 2023-12-15 |
Family
ID=75606415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011580014.7A Active CN112718362B (en) | 2020-12-28 | 2020-12-28 | Water mist generating assembly and water mist generating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112718362B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH646619A5 (en) * | 1977-10-14 | 1984-12-14 | Werding Winfried J | Spray nozzle |
| CN103108703A (en) * | 2010-07-09 | 2013-05-15 | 阿普塔尔法国简易股份公司 | Spray head for a device for dispensing a fluid product |
| KR20170001223U (en) * | 2015-09-28 | 2017-04-06 | 배매동 | The mist nozzle |
| CN206548951U (en) * | 2016-08-29 | 2017-10-13 | 名高医疗器械（昆山）有限公司 | A kind of atomizer |
| CN210933225U (en) * | 2019-08-13 | 2020-07-07 | 中山市美捷时包装制品有限公司 | Nasal cavity cleaning actuator device |
| CN111729767A (en) * | 2020-07-10 | 2020-10-02 | 浙江埃玛电器科技有限公司 | Disinfection sprayer |
| CN215088377U (en) * | 2020-12-28 | 2021-12-10 | 喻建荣 | Water mist generation assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT2018132E (en) * | 2006-05-17 | 2010-02-04 | Medmix Systems Ag | Dispensing device with a spray assembly |
-
2020
- 2020-12-28 CN CN202011580014.7A patent/CN112718362B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH646619A5 (en) * | 1977-10-14 | 1984-12-14 | Werding Winfried J | Spray nozzle |
| CN103108703A (en) * | 2010-07-09 | 2013-05-15 | 阿普塔尔法国简易股份公司 | Spray head for a device for dispensing a fluid product |
| KR20170001223U (en) * | 2015-09-28 | 2017-04-06 | 배매동 | The mist nozzle |
| CN206548951U (en) * | 2016-08-29 | 2017-10-13 | 名高医疗器械（昆山）有限公司 | A kind of atomizer |
| CN210933225U (en) * | 2019-08-13 | 2020-07-07 | 中山市美捷时包装制品有限公司 | Nasal cavity cleaning actuator device |
| CN111729767A (en) * | 2020-07-10 | 2020-10-02 | 浙江埃玛电器科技有限公司 | Disinfection sprayer |
| CN215088377U (en) * | 2020-12-28 | 2021-12-10 | 喻建荣 | Water mist generation assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112718362A (en) | 2021-04-30 |
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