CN218420612U - Oxygen-containing concentration gas preparing machine - Google Patents
Oxygen-containing concentration gas preparing machine Download PDFInfo
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- CN218420612U CN218420612U CN202221697774.0U CN202221697774U CN218420612U CN 218420612 U CN218420612 U CN 218420612U CN 202221697774 U CN202221697774 U CN 202221697774U CN 218420612 U CN218420612 U CN 218420612U
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Abstract
The utility model provides a gas preparation machine containing oxygen concentration, which comprises a gas preparation device, a nitrogen-oxygen mixing device and a constant pressure device, wherein the gas preparation device is used for outputting oxygen-containing gas and nitrogen-containing gas; the nitrogen-oxygen mixing device is used for butt joint of oxygen-containing gas, nitrogen-containing gas and external air and mixing the oxygen-containing gas, the nitrogen-containing gas and the air so as to output mixed gas with different oxygen concentrations; the constant pressure device is connected with the nitrogen-oxygen mixing device and is used for outputting mixed gas at constant pressure. Compared with the prior art, the utility model discloses simple structure, it is with low costs, can swiftly obtain the mist of different oxygen concentrations, improve the generating efficiency of the mist of different oxygen concentrations, realize the accurate control of low oxygen gas and high-oxygen gas and switch with accurate nimble, can also promote the stationarity of the mist of different oxygen concentrations, can last stable provide constant flow malleation mist, constant voltage output mist adapts to user's different demands in a flexible way.
Description
Technical Field
The utility model relates to a gas transmission technical field specifically relates to a machine is prepared to oxygen concentration gas.
Background
The high-oxygen and low-oxygen training is proved by medicine and physiology at present, has obvious improvement effect on hypertension, hyperlipidemia, arteriosclerosis, cardiac muscle function, hematopoietic ability and human brain cognition of partial crowds, and can be used for improving the function of a human body, enhancing the immune system, the nonspecific compensation ability and the aerobic output of the human body.
The oxygen concentration adjusting equipment is required to be used in intermittent high-low oxygen training, the oxygen concentration adjusting equipment in the current market utilizes sodium hydrosulfite solution as a deoxidant, air is filtered through the solution, the oxygen content in the air is reduced by the deoxidant, the deoxidant principle is that sodium hydrosulfite reacts with oxygen, the sodium hydrosulfite concentration in the solution is continuously reduced along with the reaction, the deoxidant efficiency is reduced, the change is a curve changing along with time, the oxygen concentration is difficult to accurately control, oxygen measurement and flow control equipment are required to be added when the chemical method is used for preparing low oxygen, and the cost is increased.
The gas equipment which can only output gas with single specification oxygen concentration exists in the prior art, the gas equipment has the defect that when gas with multiple specification oxygen concentrations is needed, multiple gas equipment is needed to obtain the gas with multiple specification oxygen concentrations, so that the structure is complex and the use by a user is inconvenient.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiency of the prior art, the utility model provides a machine is prepared to oxygen concentration gas, specific technical scheme is as follows:
the oxygen-containing concentration gas preparation machine comprises a gas preparation device, a nitrogen-oxygen mixing device and a constant pressure device, wherein the gas preparation device is used for outputting oxygen-containing gas and nitrogen-containing gas;
the nitrogen-oxygen mixing device is used for butt-jointing the oxygen-containing gas, the nitrogen-containing gas and external air and mixing the oxygen-containing gas, the nitrogen-containing gas and the air so as to output mixed gas with different oxygen concentrations;
the constant-pressure device is in butt joint with the nitrogen-oxygen mixing device and is used for outputting the mixed gas at constant pressure.
In a specific embodiment, the nitrogen-oxygen mixing device comprises a mixing cavity, and an oxygen cavity, an air cavity and a plurality of nitrogen cavities which are respectively communicated with the mixing cavity, wherein the oxygen cavity and the nitrogen cavities are respectively connected with the gas preparation device; a first pipeline is arranged between the mixing cavity and the constant pressure device, and the mixing cavity and the constant pressure device are connected through the first pipeline;
the oxygen cavity is used for butting the oxygen-containing gas, the air cavity is used for butting the air, and the nitrogen cavity is used for butting the nitrogen-containing gas; the mixing cavity is configured to output the mixed gas with different oxygen concentrations through a combined option of opening or closing among the oxygen cavity, the air cavity and the nitrogen cavity.
In a specific embodiment, the constant pressure device has an input port and an output port, the input port is butted against the nitrogen-oxygen mixing device and is used for receiving the mixed gas;
and the output port is provided with a sizing hole, and the sizing hole is used for limiting the gas flow of the output mixed gas.
In a particular embodiment, further comprises a respiratory mask;
the breathing mask is communicated with the mixing cavity and is used for receiving the mixed gas with different oxygen concentrations output by the mixing cavity.
In a specific embodiment, the nitrogen-oxygen mixing device further comprises a second pipeline and a silencing component;
the second pipeline is communicated with the plurality of nitrogen cavities and is used for directly outputting the nitrogen-containing gas in the nitrogen cavities;
the noise reduction assembly is arranged on the second pipeline and used for reducing noise and eliminating noise.
In a specific embodiment, the silencing assembly comprises a silencing cavity and silencing cotton, and the silencing cavity is arranged on the second pipeline;
the amortization cotton sets up in the amortization cavity, be used for making an uproar amortization of falling.
In a specific embodiment, the device further comprises a shell and a timing device, wherein the gas preparation device, the nitrogen-oxygen mixing device and the constant pressure device are all arranged in the shell;
the timing device is arranged on the shell and used for recording the time of the mixed gas with different oxygen concentrations output by the nitrogen-oxygen mixing device.
In a specific embodiment, the device further comprises a heart rate detection device;
the heart rate detection device is arranged on the shell and used for detecting the heart rate of a user.
In a specific embodiment, the system further comprises a central processing unit;
the oxygen cavity is provided with an oxygen valve, the air cavity is provided with an air valve, and each nitrogen cavity is provided with a nitrogen valve; the oxygen valve is used for opening or closing the oxygen cavity, the air valve is used for opening or closing the air cavity, and the nitrogen valve is used for opening or closing the corresponding nitrogen cavity;
the central processing unit is respectively and electrically connected with the oxygen valve, the air valve and the nitrogen valve and is used for controlling the opening and closing of the oxygen valve, the air valve and the nitrogen valve.
In a specific embodiment, the constant pressure device comprises a stabilized air pump.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a machine is prepared to oxygen concentration gas, simple structure, it is with low costs, can swiftly obtain the mist of different oxygen concentrations, improve the generating efficiency of the mist of different oxygen concentrations, realize the accurate control of low oxygen gas and high oxygen gas and switch with accurate nimble, can also promote the stationarity of the mist of different oxygen concentrations, can last stable provide constant flow malleation mist, constant voltage output mist, nimble different demands that adapt to the user.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a block diagram showing the construction of an air compressing apparatus, a gas preparing apparatus, a nitrogen-oxygen mixing apparatus and a constant pressure apparatus in the example;
FIG. 2 is a schematic sectional view showing the structure of an air compressing apparatus, a gas preparing apparatus, a nitrogen-oxygen mixing apparatus, a constant pressure apparatus and a silencer assembly in the embodiment;
FIG. 3 is a schematic structural view of a nitrogen-oxygen mixing apparatus in an embodiment;
FIG. 4 is a schematic view of the structure of an oxygen concentration-containing gas producing machine in the example.
Description of the main element symbols:
1-a gas preparation device; 2-a nitrogen-oxygen mixing device; 3-constant pressure device; 4-an air compression device; 5-mixing the cavity; 6-oxygen chamber; 7-an air cavity; 8-nitrogen cavity; 9-an oxygen outlet; 10-a nitrogen outlet; 11-a third pipeline; 12-a fourth line; 13-a first conduit; 14-a second conduit; 15-a sound attenuating assembly; 16-a housing; 17-a timing device; 18-heart rate detection means; 19-a central processing unit; 20-an oxygen valve; 21-an air valve; a 22-nitrogen gas valve; 23-a moving assembly; 24-an input port; 25-outlet.
Detailed Description
Examples
As shown in fig. 1 to 4, the present embodiment provides an oxygen-containing concentration gas producing machine, including a gas producing apparatus 1, a nitrogen-oxygen mixing apparatus 2 and a constant pressure apparatus 3, wherein the nitrogen-oxygen mixing apparatus 2 is connected to the gas producing apparatus 1 and the constant pressure apparatus 3, respectively, and the gas producing apparatus 1 is used for outputting an oxygen-containing gas and a nitrogen-containing gas; the nitrogen-oxygen mixing device 2 is used for butt-jointing oxygen-containing gas, nitrogen-containing gas and external air, and mixing the oxygen-containing gas, the nitrogen-containing gas and the air to output mixed gas with different oxygen concentrations; the constant pressure device 3 is connected with the nitrogen-oxygen mixing device 2, and the constant pressure device 3 is used for outputting mixed gas at constant pressure; in this embodiment, the constant pressure device 3 may be selected as a constant pressure air pump.
Specifically, the nitrogen-oxygen mixing device 2 is used for receiving external air and the oxygen-containing gas and the nitrogen-containing gas delivered by the gas preparation device 1, and mixing the oxygen-containing gas, the nitrogen-containing gas and the external air to generate mixed gas with different oxygen concentrations and output the mixed gas with different oxygen concentrations; constant voltage device 3 is connected nitrogen oxygen mixing arrangement 2, is used for carrying out the constant voltage output to the mist, can last stable provide constant flow malleation mist, promotes the mist's of different oxygen concentration stationarity.
Specifically, the gas production apparatus 1 is for outputting a high oxygen concentration gas, for example, oxygen gas having a concentration of 75%; the gas preparation device 1 is also used for outputting high-nitrogen-concentration gas; the gas preparation device 1 can be a molecular sieve type oxygen preparation system, and the specific structure of the molecular sieve type oxygen preparation system can be realized by the prior art, which is not described in detail in this embodiment.
Optionally, this embodiment simple structure, it is with low costs, can swiftly obtain the mist of different oxygen concentrations, improve the mist's of different oxygen concentrations generation efficiency, realize the gaseous accurate control of hypoxemia and high-oxygen and switch with accurate nimble, can also promote the stationarity of the mist of different oxygen concentrations, can last stable provide constant flow malleation mist, constant voltage output mist, nimble different demands that adapt to the user.
In the embodiment, the device further comprises an air compression device 4, the air compression device 4 is used for delivering compressed air to the gas preparation device 1, and the gas preparation device 1 is used for receiving the compressed air delivered by the air compression device 4 and generating oxygen-containing gas and nitrogen-containing gas; the air compression device 4 may be an air compressor, and the specific structure of the air compressor may be implemented by the prior art, which is not described in detail in this embodiment.
In this embodiment, the nitrogen-oxygen mixing device 2 includes a mixing cavity 5, and an oxygen cavity 6, an air cavity 7 and a plurality of nitrogen cavities 8 which are respectively communicated with the mixing cavity 5; the oxygen cavity 6 and the nitrogen cavity 8 are respectively connected with the gas preparation device 1, a first pipeline 13 is arranged between the mixing cavity 5 and the constant pressure device 3, and the mixing cavity 5 and the constant pressure device 3 are connected through the first pipeline 13. The oxygen cavity 6 is used for butt joint of oxygen-containing gas, the air cavity 7 is used for butt joint of air, and the nitrogen cavity 8 is used for butt joint of nitrogen-containing gas; the mixing cavity 5 is configured to output mixed gas with different oxygen concentrations through the combination options of opening or closing among the oxygen cavity 6, the air cavity 7 and the nitrogen cavity 8; the number of the nitrogen cavities 8 can be 2, 3, 4 or 5, and the like, and in this embodiment, the number of the nitrogen cavities 8 can be 3.
Specifically, gas preparation facilities 1 has oxygen outlet 9 and nitrogen outlet 10, be provided with third pipeline 11 between oxygen cavity 6 and the oxygen outlet 9, connect through third pipeline 11 between oxygen cavity 6 and the oxygen outlet 9, be provided with fourth pipeline 12 between nitrogen cavity 8 and the nitrogen outlet 10, connect through fourth pipeline 12 between nitrogen cavity 8 and the nitrogen outlet 10, oxygen-containing gas in the gas preparation facilities 1 transmits to oxygen cavity 6 through third pipeline 11, nitrogen-containing gas in the gas preparation facilities 1 transmits to in nitrogen cavity 8 through fourth pipeline 12.
Optionally, the mixing chamber 5 is configured to output mixed gas of different oxygen concentrations by a combined option of opening or closing between the oxygen chamber 6, the air chamber 7 and the nitrogen chamber 8, for example: when the oxygen cavity 6 is opened, the air cavity 7 is closed and the nitrogen cavities 8 are closed, the oxygen-containing gas in the gas preparation device 1 is input into the oxygen cavity 6 through the third pipeline 11, and the oxygen-containing gas in the oxygen cavity 6 is input into the mixing cavity 5 to generate a mixed gas with higher oxygen concentration; when the oxygen cavity 6 is opened, the air cavity 7 is opened and the plurality of nitrogen cavities 8 are all opened, the oxygen-containing gas in the gas preparation device 1 is input into the oxygen cavity 6 through the third pipeline 11, the nitrogen-containing gas in the gas preparation device 1 is input into the nitrogen cavity 8 through the fourth pipeline 12, the external air is input into the air cavity 7, the oxygen-containing gas in the oxygen cavity 6, the nitrogen-containing gas in the nitrogen cavity 8 and the air in the air cavity 7 are all input into the mixing cavity 5, and mixed gas with lower oxygen concentration is generated.
In the embodiment, the constant pressure device 3 has an input port 24 and an output port 25, the input port 24 is connected with the nitrogen-oxygen mixing device 2 in a butt joint mode and is used for receiving mixed gas; the outlet 25 is provided with a sizing hole (not shown) for limiting the gas flow rate of the outputted mixed gas.
Specifically, the constant pressure device 3 may be a constant pressure air pump, and the constant pressure air pump is connected to the mixing cavity 5 through a first pipeline 13, that is, one end of the first pipeline 13 is connected to the mixing cavity 5, and the other end of the first pipeline 13 is connected to an input port 24 of the constant pressure device 3, and is configured to transmit the mixed gas output by the mixing cavity 5 to the constant pressure device 3; a sizing hole is arranged on the output port 25, the sizing hole can be a sizing hole with 16L of gas flow and 1mm of inner diameter, and the sizing hole is used for limiting the gas flow of the output mixed gas to be 16L; both the inlet 24 and the outlet 25 may optionally be an outlet conduit arrangement.
In this embodiment, a breathing mask (not shown in the figure) is further included; breathing mask intercommunication mixing cavity 5, the mixed gas that is used for receiving the different oxygen concentration of mixing cavity 5 output, the user of being convenient for uses, and the user can select to wear breathing mask at face to realize the high low oxygen training.
In this embodiment, the nitrogen-oxygen mixing device 2 further includes a second pipeline 14 and a silencing component 15; the second pipeline 14 is communicated with the plurality of nitrogen cavities 8 and is used for directly outputting nitrogen-containing gas in the nitrogen cavities 8; the silencing assembly 15 is disposed on the second pipeline 14 for reducing noise and silencing.
In this embodiment, the silencing component 15 includes at least one silencing cavity and silencing cotton, where the silencing cavity is disposed on the second pipeline 14, and specifically, the silencing cavity is disposed on the second pipeline 14 and is communicated with the second pipeline 14; the silencing cotton is arranged in the silencing cavity and used for reducing noise and silencing; the number of the silencing cavities comprises 1, 2, 3 or 4, and the like, and in the embodiment, the number of the silencing cavities can be 2.
In the embodiment, the device also comprises a shell 16 and a timing device 17, wherein the air compression device 4, the gas preparation device 1, the nitrogen-oxygen mixing device 2 and the constant pressure device 3 are all arranged in the shell 16; the timing device 17 is arranged on the shell 16 and used for recording the time when the nitrogen-oxygen mixing device 2 outputs the mixed gas with different oxygen concentrations.
In this embodiment, a heart rate detection device 18 is further included; a heart rate detection device 18 is provided on the housing 16 for detecting the heart rate of the user.
In this embodiment, the system further comprises a central processing unit 19; an oxygen valve 20 is arranged on the oxygen cavity 6, an air valve 21 is arranged on the air cavity 7, and a nitrogen valve 22 is respectively arranged on each nitrogen cavity 8; the oxygen valve 20 is used for opening or closing the oxygen cavity 6, the air valve 21 is used for opening or closing the air cavity 7, and the nitrogen valve 22 is used for opening or closing the corresponding nitrogen cavity 8; the cpu 19 is electrically connected to the oxygen valve 20, the air valve 21 and the nitrogen valve 22, respectively, for controlling the opening and closing of the oxygen valve 20, the air valve 21 and the nitrogen valve 22.
Specifically, when the oxygen valve 20 is opened, the oxygen valve is used to open the oxygen cavity 6, so that the oxygen-containing gas in the oxygen cavity 6 is input into the mixing cavity, and when the oxygen valve 20 is closed, the oxygen valve is used to close the oxygen cavity 6, so that the oxygen-containing gas in the oxygen cavity 6 stops being input into the mixing cavity; when the nitrogen valve 22 is opened, the corresponding nitrogen cavity 8 is opened to input the nitrogen-containing gas in the nitrogen cavity 8 into the mixing cavity, and when the nitrogen valve 22 is closed, the corresponding nitrogen cavity 8 is closed to stop inputting the nitrogen-containing gas in the nitrogen cavity 8 into the mixing cavity; when the air valve 21 is opened, the air valve is used to open the air chamber 7 and input the air in the air chamber 7 into the mixing chamber, and when the air valve 21 is closed, the air valve is used to close the air chamber 7 and stop inputting the air in the air chamber 7 into the mixing chamber.
In this embodiment, the constant pressure device 3 includes a pressure-stabilizing air pump, such as a compressor, and the specific structure of the compressor can be realized by the prior art, which is not described in detail in this embodiment.
In this embodiment, the oxygen concentration gas making machine further comprises a moving assembly 23, wherein the moving assembly 23 is arranged at the bottom of the shell 16 and is used for assisting the shell 16 to move, namely assisting the oxygen concentration gas making machine to move; the moving assembly 23 may be selected as a plurality of rollers.
Compared with the prior art, the oxygen concentration gas preparation machine that this embodiment provided, moreover, the steam generator is simple in structure, low cost, can swiftly obtain the mist of different oxygen concentrations, improve the generating efficiency of the mist of different oxygen concentrations, realize that the accurate control of the gaseous and high oxygen body of hypoxemia switches with accurate nimble, can also promote the stationarity of the mist of different oxygen concentrations, can be the continuous stable constant flow malleation mist that provides, constant voltage output mist, nimble different demands that adapt to the user.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario.
The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (10)
1. The oxygen-containing concentration gas preparation machine is characterized in that:
the device comprises a gas preparation device, a nitrogen-oxygen mixing device and a constant pressure device, wherein the gas preparation device is used for outputting oxygen-containing gas and nitrogen-containing gas;
the nitrogen-oxygen mixing device is used for butt-jointing the oxygen-containing gas, the nitrogen-containing gas and external air and mixing the oxygen-containing gas, the nitrogen-containing gas and the air so as to output mixed gas with different oxygen concentrations;
the constant-pressure device is in butt joint with the nitrogen-oxygen mixing device and is used for outputting the mixed gas at constant pressure.
2. The oxygen concentration-containing gas producing machine according to claim 1, wherein:
the nitrogen-oxygen mixing device comprises a mixing cavity, an oxygen cavity, an air cavity and a plurality of nitrogen cavities, wherein the oxygen cavity, the air cavity and the plurality of nitrogen cavities are respectively communicated with the mixing cavity, and the oxygen cavity and the nitrogen cavities are respectively connected with the gas preparation device; a first pipeline is arranged between the mixing cavity and the constant pressure device, and the mixing cavity and the constant pressure device are connected through the first pipeline;
the oxygen cavity is used for butting the oxygen-containing gas, the air cavity is used for butting the air, and the nitrogen cavity is used for butting the nitrogen-containing gas; the mixing cavity is configured to output the mixed gas with different oxygen concentrations through a combined option of opening or closing among the oxygen cavity, the air cavity and the nitrogen cavity.
3. The oxygen concentration-containing gas producing machine according to claim 1, wherein:
the constant pressure device is provided with an input port and an output port, and the input port is butted with the nitrogen-oxygen mixing device and is used for receiving the mixed gas;
and the output port is provided with a sizing hole, and the sizing hole is used for limiting the gas flow of the output mixed gas.
4. The oxygen concentration-containing gas producing machine according to claim 2, wherein:
also comprises a breathing mask;
the breathing mask is communicated with the mixing cavity and is used for receiving the mixed gas with different oxygen concentrations output by the mixing cavity.
5. The oxygen-containing concentration gas producing machine according to claim 2, wherein:
the nitrogen-oxygen mixing device also comprises a second pipeline and a silencing component;
the second pipeline is communicated with the plurality of nitrogen cavities and is used for directly outputting the nitrogen-containing gas in the nitrogen cavities;
the noise reduction assembly is arranged on the second pipeline and used for reducing noise and eliminating noise.
6. The oxygen concentration-containing gas producing machine according to claim 5, wherein:
the silencing assembly comprises a silencing cavity and silencing cotton, and the silencing cavity is arranged on the second pipeline;
the noise reduction cotton is arranged in the noise reduction cavity and used for reducing noise.
7. The oxygen concentration-containing gas producing machine according to claim 1, wherein:
the gas preparation device, the nitrogen-oxygen mixing device and the constant pressure device are all arranged in the shell;
the timing device is arranged on the shell and used for recording the time of the mixed gas with different oxygen concentrations output by the nitrogen-oxygen mixing device.
8. The oxygen-containing concentration gas producing machine according to claim 7, wherein:
the heart rate detection device is further included;
the heart rate detection device is arranged on the shell and used for detecting the heart rate of a user.
9. The oxygen concentration-containing gas producing machine according to claim 2, wherein:
the system also comprises a central processing unit;
an oxygen valve is arranged on the oxygen cavity, an air valve is arranged on the air cavity, and a nitrogen valve is respectively arranged on each nitrogen cavity; the oxygen valve is used for opening or closing the oxygen cavity, the air valve is used for opening or closing the air cavity, and the nitrogen valve is used for opening or closing the corresponding nitrogen cavity;
the central processing unit is respectively and electrically connected with the oxygen valve, the air valve and the nitrogen valve and is used for controlling the opening and closing of the oxygen valve, the air valve and the nitrogen valve.
10. The oxygen concentration-containing gas producing machine according to claim 1, wherein:
the constant pressure device comprises a pressure stabilizing air pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221697774.0U CN218420612U (en) | 2022-06-30 | 2022-06-30 | Oxygen-containing concentration gas preparing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221697774.0U CN218420612U (en) | 2022-06-30 | 2022-06-30 | Oxygen-containing concentration gas preparing machine |
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| Publication Number | Publication Date |
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| CN218420612U true CN218420612U (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221697774.0U Active CN218420612U (en) | 2022-06-30 | 2022-06-30 | Oxygen-containing concentration gas preparing machine |
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| CN (1) | CN218420612U (en) |
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- 2022-06-30 CN CN202221697774.0U patent/CN218420612U/en active Active
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