CN218590129U - Exhaust silencer and medical oxygen generator - Google Patents
Exhaust silencer and medical oxygen generator Download PDFInfo
- Publication number
- CN218590129U CN218590129U CN202222601074.3U CN202222601074U CN218590129U CN 218590129 U CN218590129 U CN 218590129U CN 202222601074 U CN202222601074 U CN 202222601074U CN 218590129 U CN218590129 U CN 218590129U
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- Prior art keywords
- air inlet
- flow guide
- inlet hole
- annular
- communicated
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- 230000003584 silencer Effects 0.000 title claims abstract description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 20
- 239000001301 oxygen Substances 0.000 title claims description 20
- 229910052760 oxygen Inorganic materials 0.000 title claims description 20
- 229920000742 Cotton Polymers 0.000 claims abstract description 29
- 230000030279 gene silencing Effects 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 18
- 238000003780 insertion Methods 0.000 claims abstract description 14
- 230000037431 insertion Effects 0.000 claims abstract description 14
- 239000002808 molecular sieve Substances 0.000 claims description 23
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 23
- 238000005192 partition Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 206010036790 Productive cough Diseases 0.000 description 8
- 208000024794 sputum Diseases 0.000 description 7
- 210000003802 sputum Anatomy 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 4
- 230000001743 silencing effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 206010062717 Increased upper airway secretion Diseases 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 208000026435 phlegm Diseases 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Abstract
The utility model belongs to the technical field of medical instrument, especially, relate to an exhaust silencer and medical oxygenerator. The exhaust silencer comprises an air inlet pipe, a flow guide pipe, a silencing cotton column and an installation cylinder; the air inlet pipe is provided with a first air inlet; the honeycomb duct comprises an inserting part and a flow guide part connected with the inserting part, the inserting part is provided with a second air inlet hole and a plurality of windows arranged at intervals around the second air inlet hole, and the flow guide part is provided with a flow guide cavity; the mounting cylinder is provided with an air outlet and an annular accommodating cavity surrounding the air outlet; the air inlet pipe is arranged on the mounting cylinder, the insertion part is inserted in the first air inlet hole, the flow guide part extends into the annular accommodating cavity, and the silencing cotton column is arranged in the annular accommodating cavity; the first air inlet hole is communicated with the second air inlet hole, the second air inlet hole is communicated with the annular containing cavity through the window, the annular containing cavity is communicated with the flow guide cavity through the silencing cotton column, and the flow guide cavity is communicated with the air outlet hole. The utility model discloses in, this exhaust silencer has better noise cancelling effect to gas.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, especially relate to an exhaust silencer and medical oxygenerator.
Background
The oxygen generator separates oxygen from air by utilizing molecular sieve physical adsorption and desorption technology and discharges phlegm gas. The oxygenerator can produce great noise when expectorating, and current oxygenerator generally disposes expectoration silencing device. However, the existing sputum discharging silencer comprises a sleeve and silencing cotton arranged in the sleeve, sputum discharged by the oxygen generator enters the sleeve and is discharged after being silenced by the silencing cotton, and the sputum directly enters the silencing cotton to be silenced, so that the silencing effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides an exhaust silencer and medical oxygenerator to the not good technical problem of sputum silencing effect of sputum discharging silencing device among the prior art.
In view of the above technical problems, an embodiment of the present invention provides an exhaust muffler, including an air inlet pipe, a flow guide pipe, a sound deadening cotton column, and an installation cylinder; the air inlet pipe is provided with a first air inlet; the honeycomb duct comprises an inserting part and a flow guide part connected with the inserting part, the inserting part is provided with a second air inlet hole and a plurality of windows arranged at intervals around the second air inlet hole, the windows are all communicated with the second air inlet hole, and the flow guide part is provided with a flow guide cavity; the mounting cylinder is provided with an air outlet and an annular accommodating cavity arranged around the air outlet;
the air inlet pipe is installed on the installation cylinder, the insertion part is inserted in the air inlet hole, the flow guide part extends into the annular accommodating cavity, and the silencing cotton column is installed in the annular accommodating cavity; the first air inlet hole is communicated with the second air inlet hole, the second air inlet hole is communicated with the annular containing cavity through the window, the annular containing cavity is communicated with the flow guide cavity through the silencing cotton column, and the flow guide cavity is communicated with the air outlet hole.
Optionally, the air inlet pipe includes an extension portion and a connecting portion connected to the extension portion, the extension portion and the connecting portion are both provided with the first air inlet hole, and an outer diameter of the extension portion is smaller than an outer diameter of the connecting portion;
the outer wall of the connecting portion is provided with a first external thread, the inner wall of the annular accommodating cavity is provided with a first internal thread, and the connecting portion is connected with the first external thread and the first internal thread in a threaded mode and is inserted into the annular accommodating cavity.
Optionally, a second external thread is arranged on the outer wall of the inserting part, a second internal thread is arranged on the inner wall of the first air inlet hole of the extending part, and the second external thread and the second internal thread which are connected through threads of the inserting part are inserted into the first air inlet hole of the extending part.
Optionally, an annular installation space is arranged on the silencing cotton, the exhaust silencer further comprises an annular partition plate installed in the annular installation space, and the annular partition plate is abutted to one end, far away from the insertion part, of the flow guide part.
Optionally, the mounting cylinder includes an outer tube and an inner tube connected to the outer tube, an axis of the outer tube coincides with an axis of the inner tube, the inner tube is provided with the air outlet, and the annular accommodating cavity is formed between the outer tube and the inner tube; the inner pipe is inserted into the diversion cavity.
The utility model discloses another embodiment still provides a medical oxygenerator, including compressor, molecular sieve tower and foretell exhaust silencer, the gas vent intercommunication of compressor the import of molecular sieve tower, the first inlet port of gas vent intercommunication of molecular sieve tower.
Optionally, the medical oxygen generator further comprises an exhaust solenoid valve, and the exhaust port of the molecular sieve tower is communicated with the first air inlet hole through the exhaust solenoid valve.
Optionally, the medical oxygen generator further comprises a box body provided with an installation space, and the exhaust silencer, the compressor and the molecular sieve tower are all installed in the installation space.
Optionally, the bottom of the box body is provided with rollers.
In the utility model, the air inlet pipe is arranged on the mounting cylinder, the inserting part is inserted in the first air inlet hole, the flow guide part extends into the annular accommodating cavity, and the silencing cotton column is arranged in the annular accommodating cavity; the first air inlet hole is communicated with the second air inlet hole, the second air inlet hole is communicated with the annular containing cavity through the window, the annular containing cavity is communicated with the flow guide cavity through the silencing cotton column, and the flow guide cavity is communicated with the air outlet hole. Gas such as oxygenerator exhaust phlegm gas, carbon dioxide pass through first inlet port enters into in the second inlet port, gas in the second inlet port passes through the window is from entering into all around the annular holds in the chamber, and gas is in behind the amortization of the cotton post of amortization in the annular holds the chamber, enters into the water conservancy diversion chamber, passes through at last the venthole is discharged. The utility model discloses in, gaseous downward entering earlier in the amortization boll, then upwards enter into in the water conservancy diversion chamber, follow at last in the venthole is discharged, has prolonged gaseous route in the amortization boll to this exhaust silencer can carry out multistage amortization to gas, has improved the noise cancelling effect of this exhaust silencer. In addition, the exhaust muffler has the advantages of simple structure, low manufacturing cost and convenient assembly.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a sectional view of an exhaust muffler according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of an exhaust muffler according to an embodiment of the present invention;
fig. 3 is a partial cross-sectional view of an exhaust muffler according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a flow guide pipe of an exhaust muffler according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a medical oxygen generator according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. an air inlet pipe; 11. a first air intake hole; 12. an extension portion; 13. a connecting portion; 2. a flow guide pipe; 21. a plug-in part; 211. a second air intake hole; 212. a window; 22. a flow guide part; 221. a flow guide cavity; 3. a sound-deadening cotton column; 4. mounting the cylinder; 41. an air outlet; 42. an annular receiving cavity; 43. an outer tube; 44. an inner tube; 5. a box body; 51. and (4) a roller.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects 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 for purposes of illustration only and are not intended to limit the invention.
It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 4, an exhaust muffler according to an embodiment of the present invention includes an air inlet pipe 1, a flow guide pipe 2, a sound-absorbing cotton column 3, and an installation cylinder 4; a first air inlet hole 11 is formed in the air inlet pipe 1; the draft tube 2 comprises an inserting part 21 and a flow guiding part 22 connected with the inserting part 21, the inserting part 21 is provided with a second air inlet hole 211 and a plurality of windows 212 arranged around the second air inlet hole 211 at intervals, the windows 212 are all communicated with the second air inlet hole 211, and the flow guiding part 22 is provided with a flow guiding cavity 221; the mounting cylinder 4 is provided with an air outlet 41 and an annular accommodating cavity 42 arranged around the air outlet 41; it can be understood that the number of the windows 212 can be designed according to actual requirements, for example, 3, 4, etc. windows 212 are provided, the windows 212 are provided below the inserting part 21, and the inserting part 21 are an integrally formed structural member.
The air inlet pipe 1 is installed on the installation cylinder 4, the insertion part 21 is inserted in the first air inlet hole 11, the flow guide part 22 extends into the annular accommodation cavity 42, and the silencing cotton column 3 is installed in the annular accommodation cavity 42; the first air inlet hole 11 is communicated with the second air inlet hole 211, the second air inlet hole 211 is communicated with the annular accommodating cavity 42 through the window 212, the annular accommodating cavity 42 is communicated with the flow guide cavity 221 through the silencing cotton column 3, and the flow guide cavity 221 is communicated with the air outlet hole 41. It can be understood that the lower part of the air inlet pipe 1 is inserted into the annular receiving chamber 42. Specifically, the gas flow direction of the exhaust muffler is: the first air inlet hole 11, the second air inlet hole 211, the window 212, the annular accommodating cavity 42, the sound-deadening cotton column 3, the flow guide cavity 221, and the air outlet hole 41.
In the utility model, the air inlet pipe 1 is installed on the installation cylinder 4, the insertion part 21 is inserted in the first air inlet hole 11, the diversion part 22 extends into the annular accommodation cavity 42, and the silencing cotton column 3 is installed in the annular accommodation cavity 42; the first air inlet hole 11 is communicated with the second air inlet hole 211, the second air inlet hole 211 is communicated with the annular accommodating cavity 42 through the window 212, the annular accommodating cavity 42 is communicated with the flow guide cavity 221 through the silencing cotton column 3, and the flow guide cavity 221 is communicated with the air outlet hole 41. Gas such as oxygenerator exhaust phlegm gas, carbon dioxide pass through first inlet port 11 enters into in the second inlet port 211, gas in the second inlet port 211 passes through window 212 enters into from all around in the annular holds the chamber 42, and gas is in the annular holds the amortization back of amortization cotton column 3 in the chamber 42, enters into water conservancy diversion chamber 221, passes through at last the venthole 41 is discharged. The utility model discloses in, gaseous earlier downwardly entering in among the amortization boll 3, then upwards enter into in the water conservancy diversion chamber 221, follow at last the venthole 41 is discharged, has prolonged the route of gaseous in the amortization boll to this exhaust silencer can carry out multistage amortization to gaseous, has improved the noise cancelling effect of this exhaust silencer. In addition, the exhaust muffler has the advantages of simple structure, low manufacturing cost and convenient assembly.
In one embodiment, as shown in fig. 1 to 3, the air inlet pipe 1 includes an extension portion 12 and a connection portion 13 connected to the extension portion 12, the extension portion 12 and the connection portion 13 are both provided with the first air inlet hole 11, and an outer diameter of the extension portion 12 is smaller than an outer diameter of the connection portion 13; it will be appreciated that the extension 12 is located outside the mounting cylinder 4 and the connection 13 is inserted in an annular receiving cavity 42 of the mounting cylinder 4.
A first external thread (not shown in the figure) is arranged on the outer wall of the connecting part 13, a first internal thread (not shown in the figure) is arranged on the inner wall of the annular accommodating cavity 42, and the connecting part 13 is inserted into the annular accommodating cavity 42 through the first external thread and the first internal thread which are in threaded connection. It can be understood that the first internal thread is disposed on the upper portion of the mounting cylinder 4, and the air inlet pipe 1 is inserted into the annular accommodating cavity 42 of the mounting cylinder 4 through the first external thread and the first internal thread which are connected through the thread, so that convenience in mounting and dismounting between the air inlet pipe 1 and the mounting cylinder 4 is improved.
In an embodiment, as shown in fig. 1 to 3, a second external thread (not shown) is provided on an outer wall of the insertion part 21, a second internal thread (not shown) is provided on an inner wall of the first air inlet hole 11 of the extension part 12, and the insertion part 21 is inserted into the first air inlet hole 11 of the extension part 12 through the second external thread and the second internal thread which are connected by a thread. It can be understood that the upper part of the insertion part 21 is inserted into the first air inlet hole 11 of the extension part 12, and the lower part of the insertion part 21 extends into the annular receiving cavity 42. In this embodiment, the inserting portion 21 of the flow guide tube 2 is inserted into the first air inlet hole 11 of the extension portion 12 through the second external thread and the second internal thread which are connected through the thread, so as to further improve the convenience of assembling and disassembling the exhaust muffler.
In an embodiment, as shown in fig. 1, an annular installation space (not shown) is provided on the sound-deadening cotton, and the exhaust muffler further includes an annular partition plate (not shown) installed in the annular installation space, where the annular partition plate abuts against one end of the flow-guiding portion 22 away from the insertion portion 21. As can be appreciated, the annular partition plate divides the silencing cotton column 3 into an outer silencing layer and an inner silencing layer; specifically, the gas enters the annular accommodating cavity 42 through the second gas inlet holes 211 through the windows 212, the gas in the annular accommodating cavity 42 firstly enters the outer sound-deadening layer downwards, then enters the inner sound-deadening layer below the sound-deadening cotton column 3, and the gas enters the flow guide cavity 221 upwards in the inner sound-deadening layer and finally is discharged through the gas outlet holes 41. In this embodiment, the design of the annular partition prolongs the flow path of the gas in the silencing cotton column 3, and further improves the silencing effect of the exhaust silencer on the gas.
In one embodiment, as shown in fig. 3, the mounting cylinder 4 includes an outer tube 43 and an inner tube 44 connected to the outer tube 43, an axis of the outer tube 43 coincides with an axis of the inner tube 44, the inner tube 44 is provided with the air outlet 41, and the annular receiving cavity 42 is formed between the outer tube 43 and the inner tube 44; the inner tube 44 is inserted into the guide chamber 221. It is understood that the inner tube 44 and the outer tube 43 are integrally formed structural members, the top of the inner tube 44 is inserted into the diversion cavity 221, and the bottom of the inner tube 44 extends out of the annular accommodating cavity 42. In this embodiment, the mounting tube 4 has a simple structure and a low manufacturing cost.
As shown in fig. 5, another embodiment of the present invention further provides a medical oxygen generator, which comprises a compressor (not shown in the figure), a molecular sieve tower (not shown in the figure) and the exhaust muffler, wherein the exhaust port of the compressor is communicated with the inlet of the molecular sieve tower, and the exhaust port of the molecular sieve tower is communicated with the first air inlet 11. It is understood that the exhaust port of the compressor can be communicated with the air inlet of the molecular sieve tower through a hose, and the exhaust port of the molecular sieve tower is communicated with the first air inlet hole 11 of the air inlet pipe 1 through a hose.
Specifically, after the compressor compresses air, the compressed air is input into the molecular sieve tower, nitrogen, carbon dioxide and the like in the air are adsorbed by the molecular sieve tower, the effluent gas is high-purity oxygen, when the sputum, the carbon dioxide and the like in the molecular sieve tower reach a certain saturation degree, the exhaust port of the molecular sieve tower is opened, the sputum, the carbon dioxide and other gases are input into the first air inlet 11, and the gases are exhausted after the silencing effect of the exhaust silencer. The utility model discloses in, this medical oxygenerator's noise is less, has improved its user experience and has felt.
In an embodiment, the medical oxygen generator further comprises an exhaust solenoid valve (not shown in the figure), and the exhaust port of the molecular sieve tower is communicated with the first air inlet 11 through the exhaust solenoid valve. It is understood that the exhaust solenoid valve can control the on-off of the pipeline between the molecular sieve tower and the exhaust muffler.
In one embodiment, as shown in fig. 5, the medical oxygen generator further includes a box body 5 having an installation space, and the exhaust muffler, the compressor and the molecular sieve tower are all installed in the installation space. It can be understood that the box 5 is a housing of the medical oxygen generator.
In one embodiment, as shown in fig. 5, the bottom of the box 5 is provided with rollers 51. It can be understood that, the rollers 51 can be set to 3, 4, etc. according to actual requirements, and the medical oxygen generator rolls on the ground through the rollers 51, thereby improving the convenience and portability of carrying the medical oxygen generator.
The above embodiments are only examples of the exhaust muffler and the medical oxygen generator of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An exhaust silencer is characterized by comprising an air inlet pipe, a flow guide pipe, a silencing cotton column and an installation cylinder; the air inlet pipe is provided with a first air inlet; the honeycomb duct comprises an inserting part and a flow guide part connected with the inserting part, the inserting part is provided with a second air inlet hole and a plurality of windows arranged at intervals around the second air inlet hole, the plurality of windows are communicated with the second air inlet hole, and the flow guide part is provided with a flow guide cavity; the mounting cylinder is provided with an air outlet and an annular accommodating cavity arranged around the air outlet;
the air inlet pipe is installed on the installation cylinder, the insertion part is inserted in the first air inlet hole, the flow guide part extends into the annular accommodating cavity, and the silencing cotton column is installed in the annular accommodating cavity; the first air inlet hole is communicated with the second air inlet hole, the second air inlet hole is communicated with the annular containing cavity through the window, the annular containing cavity is communicated with the flow guide cavity through the silencing cotton column, and the flow guide cavity is communicated with the air outlet hole.
2. The exhaust muffler according to claim 1, wherein said intake pipe includes an extension portion and a connecting portion connecting said extension portion, said first intake port being provided in each of said extension portion and said connecting portion, and an outer diameter of said extension portion is smaller than an outer diameter of said connecting portion;
the outer wall of the connecting portion is provided with a first external thread, the inner wall of the annular accommodating cavity is provided with a first internal thread, and the connecting portion is connected with the first external thread and the first internal thread in a threaded mode and is inserted into the annular accommodating cavity.
3. The exhaust muffler according to claim 2, wherein a second external thread is provided on an outer wall of the insertion portion, a second internal thread is provided on an inner wall of the first air inlet hole of the extension portion, and the second external thread and the second internal thread of the insertion portion, which are connected by a thread, are inserted into the first air inlet hole of the extension portion.
4. The exhaust muffler according to claim 1, wherein an annular mounting space is provided in the silencing cotton, and the exhaust muffler further includes an annular partition plate mounted in the annular mounting space, the annular partition plate abutting against an end of the flow guide portion away from the insertion portion.
5. The exhaust muffler according to claim 1, wherein said mounting cylinder includes an outer pipe and an inner pipe connected to said outer pipe, an axis of said outer pipe coincides with an axis of said inner pipe, said inner pipe is provided with said air outlet, and said annular receiving cavity is formed between said outer pipe and said inner pipe; the inner pipe is inserted into the diversion cavity.
6. A medical oxygen generator, which is characterized by comprising a compressor, a molecular sieve tower and the exhaust silencer of any one of claims 1 to 5, wherein an exhaust port of the compressor is communicated with an inlet of the molecular sieve tower, and an exhaust port of the molecular sieve tower is communicated with a first air inlet hole.
7. The medical oxygen generator as claimed in claim 6, further comprising an exhaust solenoid valve, wherein the exhaust port of the molecular sieve tower is communicated with the first inlet port through the exhaust solenoid valve.
8. The medical oxygen generator as claimed in claim 6, further comprising a box body provided with an installation space, wherein the exhaust muffler, the compressor and the molecular sieve tower are installed in the installation space.
9. The medical oxygen generator as claimed in claim 8, wherein rollers are provided at the bottom of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222601074.3U CN218590129U (en) | 2022-09-29 | 2022-09-29 | Exhaust silencer and medical oxygen generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222601074.3U CN218590129U (en) | 2022-09-29 | 2022-09-29 | Exhaust silencer and medical oxygen generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218590129U true CN218590129U (en) | 2023-03-10 |
Family
ID=85401387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222601074.3U Active CN218590129U (en) | 2022-09-29 | 2022-09-29 | Exhaust silencer and medical oxygen generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218590129U (en) |
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- 2022-09-29 CN CN202222601074.3U patent/CN218590129U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000, Building 1, 101, Evergrande Fashion Huigu Building, Fulong Road, Shanghenglang Community, Dalang Street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Security Medical Technology Co.,Ltd. Country or region after: China Address before: A1302, Shenzhen national engineering laboratory building, No.20, Gaoxin South 7th Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen Security Medical Technology Co.,Ltd. Country or region before: China |