CN115970121B - Safety valve, inhalation valve and breathing machine - Google Patents
Safety valve, inhalation valve and breathing machineInfo
- Publication number
- CN115970121B CN115970121B CN202211663720.7A CN202211663720A CN115970121B CN 115970121 B CN115970121 B CN 115970121B CN 202211663720 A CN202211663720 A CN 202211663720A CN 115970121 B CN115970121 B CN 115970121B
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- China
- Prior art keywords
- valve
- abutment
- vent
- safety valve
- opening
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- 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.)
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- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The embodiment of the invention discloses a safety valve, an inhalation valve and a breathing machine, wherein the safety valve comprises a mounting seat, a sealing assembly and a driving assembly. The mounting seat is provided with an air passage penetrating the mounting seat, the sealing component which is elastically connected is provided with a first position capable of sealing the air passage and a second position capable of opening the air passage, the sealing component is forced to be positioned at the first position or the second position by elastic force in a free state, and the driving component can drive the sealing component to move against the elastic force so as to enable the sealing component to be changed between the first position and the second position. Through setting up seal assembly, seal assembly elastic connection is on the mount pad, and under the free state, seal assembly can be located under the effect of elastic force with the confined first position of air vent or be located the second position of opening the air vent, through the cooperation of seal assembly that drive assembly and elasticity set up, can realize opening and close of air vent, simple structure, reduce cost, it is also more convenient to assemble.
Description
Technical Field
The invention relates to the technical field of respirators, in particular to a safety valve, an inhalation valve and a respirator.
Background
A safety valve is generally arranged in the breathing machine, and the safety valve is positioned on a path for delivering gas to a patient and is used for removing the pressure of the gas under the condition that the pressure of the delivered gas exceeds the required pressure so as to smoothly deliver the gas to the patient.
In the related art, the safety valve of the breathing machine mostly adopts an electromagnet type safety valve with larger volume or a mechanical safety valve with a complex structure, and the structure is complex, so that the assembly is more troublesome, and the technical cost is increased.
Disclosure of Invention
In view of the above, it is necessary to provide a safety valve, an inhalation valve, and a ventilator that have a simple structure and reduced cost.
In one aspect, an embodiment of the present invention provides a safety valve, including:
the mounting seat is provided with an air passage which is arranged in a penetrating way;
The sealing component is elastically connected to the mounting seat and is provided with a first position capable of sealing the air passage and a second position capable of opening the air passage, and in a free state, the sealing component is forced to be positioned at the first position or the second position by elastic force;
a drive assembly capable of driving the closure assembly against a resilient force to shift the closure assembly between the first and second positions.
In some embodiments of the safety valve, the sealing component includes a valve core movably disposed in the mounting seat and a membrane sleeved on the valve core, one end of the valve core is elastically connected in the mounting seat, and the elastic force can drive the membrane to seal one end of the air passage in a free state.
In some embodiments of the safety valve, a guide shaft is fixedly connected in the mounting seat, the valve core is sleeved on the guide shaft, an elastic piece is further sleeved on the guide shaft, and one end of the elastic piece is connected to one end of the valve core and is used for providing elastic force for the valve core.
In some embodiments of the safety valve, the air passage has two openings, the sealing component is arranged between the two openings, the mounting seat is detachably connected with an abutting piece at one opening of the air passage, the abutting piece penetrates through a through hole communicated with the air passage, the outer wall of the abutting piece is tightly attached to the inner wall of the air passage, so that air flow can only flow out through the through hole, and the sealing component can abut on the through hole to seal the through hole.
In some embodiments of the safety valve, a plurality of connecting grooves are formed in the inner wall of the air passage, and connecting blocks are arranged on the abutting piece at positions corresponding to the connecting grooves;
Or a plurality of connecting grooves are formed in the abutting piece, and connecting blocks are arranged on the inner wall of the air passage at positions corresponding to the connecting grooves;
the connecting block can be inserted into the connecting groove, and the connecting block can be clamped into the connecting groove by twisting the abutting piece.
In some embodiments of the safety valve, the connecting groove includes a movable end and a clamping end, the movable end extends from the opening of the air duct along the opening direction of the air duct, and one end of the clamping end is communicated with one end of the movable end far away from the opening and is set with the movable end in a preset included angle.
In some embodiments of the safety valve, the driving component is a solenoid valve, one end of the solenoid valve is provided with a movable shaft core, and the solenoid valve can drive the shaft core to move so as to drive the closing component to change between the first position and the second position.
In some embodiments of the safety valve, the shaft core is further provided with a clamping groove, and the shaft core is further sleeved with a limiting piece with a part of structure clamped in the clamping groove, and the limiting piece is located between the mounting seat and the electromagnetic valve and used for limiting the position of the shaft core.
In another aspect, an embodiment of the present invention further provides an inhalation valve, including a valve body having a main air passage through which an air flow flows;
and the safety valve is arranged on the valve body, and the air passage is communicated with the main air passage.
In yet another aspect, an embodiment of the present invention further provides a ventilator including the inhalation valve described above.
The embodiment of the invention has the following beneficial effects:
According to the safety valve, the inhalation valve and the breathing machine of the embodiment, the sealing component is elastically connected to the mounting seat, and in a free state, the sealing component can be located at a first position for sealing the airway or a second position for opening the airway under the action of elastic force. The driving assembly can be utilized to drive the closing assembly to another position no matter the initial position of the closing assembly is in the first position or the second position, so that the air passage is opened or closed, and after the force exerted on the closing assembly by the driving assembly is removed, the closing assembly is restored to the original position under the action of elastic force. The air passage can be opened and closed through the cooperation of the driving assembly and the elastic sealing assembly, the structure is simple, the cost is reduced, and the assembly is more convenient.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 shows a cross-sectional view of an inhalation valve provided in accordance with an embodiment of the present invention;
FIG. 2 shows a cross-sectional view of a mounting seat for a safety valve provided in accordance with an embodiment of the present invention;
FIG. 3 shows a cross-sectional view of an abutment for a safety valve provided in accordance with an embodiment of the present invention;
FIG. 4 shows a cross-sectional view of a spool of a relief valve provided in accordance with an embodiment of the present invention;
FIG. 5 shows a cross-sectional view of a spool of a safety valve provided in accordance with an embodiment of the present invention;
fig. 6 shows a schematic structural diagram of an inhalation valve according to an embodiment of the present invention.
Description of main reference numerals:
1. mounting seat, 11, air duct, 111, first opening, 112, second opening, 12, guide shaft, 13, elastic piece, 14, spring limit post, 141, mounting groove, 2, closing component, 21, valve core, 211, first part, 212, second part, 213, through groove, 22, diaphragm, 30, driving component, 31, shaft core, 311, clamping groove, 312, limit piece, 40, abutting piece, 401, through hole, 402, boss, 403, abutting edge, 404, driving block, 405, groove, 406, sealing ring, 50, connecting groove, 501, movable end, 502, clamping end, 51, connecting block, 6, valve body, 61, main air duct, 62, pressure relief port, 63 and mounting frame.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In one aspect, the present invention provides a safety valve that can be applied to a ventilation system, and in one embodiment, referring to fig. 1, the safety valve includes a mounting seat 1, a closing assembly 2, and a driving assembly 30. The mount 1 has an air passage 11 penetrating therethrough, and the air flow can flow through the air passage 11, and since the air passage 11 penetrates therethrough, the air flow can flow into the air passage 11 from one end of the air passage 11 and flow out of the air passage 11 from the other end.
The closing assembly 2 is elastically connected to the mounting base 1, and the closing assembly 2 has a first position capable of closing the air duct 11 and a second position capable of opening the air duct 11 on the mounting base 1. The closure assembly 2 is switchable between a first position and a second position to effect opening and closing of the airway 11. In the free state, the elastic force can force the closure assembly 2 to be in the first position or the second position.
The drive assembly 30 is capable of driving the closure assembly 2 against a resilient force to shift the closure assembly 2 between the first and second positions. If the closure assembly 2 is in the first position in the free state, the air passage 11 is in the normally closed state, the driving assembly 30 can drive the closure assembly 2 to move to the second position against the elastic force so as to open the air passage 11, and if the closure assembly 2 is in the second position in the free state, the air passage 11 is in the normally open state, and the driving assembly 30 can drive the closure assembly 2 to move to the first position against the elastic force so as to close the air passage 11. It should be noted that, regardless of the position of the closure assembly 2 in the free state, when the closure assembly 2 is driven to move to another position by the driving assembly 30 against the elastic force, the driving force of the driving assembly 30 is removed, and the closure assembly 2 is driven to return to the original position by the elastic force.
The ventilation channel 11 can be opened and closed through the cooperation of the driving assembly 30 and the elastic sealing assembly 2, so that the structure is simple, and the cost is reduced.
In a specific embodiment, referring to fig. 1, 2 and 4, the sealing assembly 2 includes a valve core 21 movably disposed in the mounting seat 1 and a membrane 22 sleeved on the valve core 21, one end of the valve core 21 is elastically connected in the mounting seat 1, and the membrane 22 can be driven by the elastic force to seal one end of the air duct 11 in a free state, that is, the membrane 22 is located at the first position.
It should be noted that the valve core 21 may have various shapes such as a rectangular shape or a cylindrical shape, and in the embodiment of the present invention, the valve core 21 has two parts, and the first part 211 and the second part 212 are integrally formed or welded. One end of the second portion 212 is fixedly connected to a middle position of one end of the first portion 211, the second portion 212 has a certain length, is integrally cylindrical, the first portion 211 is arranged in a disc shape, the first portion 211 and the second portion 212 are coaxially arranged, and the radial dimension of the second portion 212 is smaller than that of the first portion 211, so that the first portion 211 and the second portion 212 are arranged in a T shape.
The membrane 22 may be made of plastic, stainless steel, aluminum alloy or silica gel, preferably flexible material such as rubber or silica gel, and the membrane 22 is hollow, and the shape and size of the hollow structure of the membrane 22 are adapted to the first portion 211, so that the membrane 22 can be sleeved outside the first portion 211. By setting the valve core 21 to be 'T' -shaped, the diaphragm 22 is sleeved on the valve core 21 and is not easy to separate, the diaphragm 22 is made of rubber or silica gel, and when the air passage 11 is blocked by the diaphragm 22, the air tightness is better.
In a specific embodiment, the guide shaft 12 is also fixedly connected in the mounting seat 1, the valve core 21 is penetrated with a through groove 213 which is matched with the shape and the size of the guide shaft 12 along the axis of the valve core, the guide shaft 12 can be inserted into the through groove 213, and the guide shaft 12 is in clearance fit with the through groove 213. The guide shaft 12 is also sleeved with an elastic piece 13, one end of the elastic piece 13 is fixed, and the other end is fixedly connected to one end of the valve core 21, which is far away from the diaphragm 22. By providing the guide shaft 12, one end of the guide shaft 12 is inserted into the valve element 21 so that the valve element 21 can move along the path of the guide shaft 12, and by providing the elastic member 13, elastic connection of the valve element 21 can be achieved.
In one embodiment, referring to fig. 1to 4, the air duct 11 has two openings, namely, a first opening 111 and a second opening 112, and the cross section of the air duct 11 may be various shapes, such as rectangular or trapezoid, and the like, which is not limited herein. In a preferred embodiment, the airway 11 is "L" shaped in path, with the first opening 111 and the second opening 112 at each end of the "L" shape. The closure assembly 2 is arranged between two openings, one of which can be closed by movement of the membrane 22.
Specifically, the inner wall of the mounting seat 1 opposite to the second opening 112 is provided with a spring limiting column 14, and the spring limiting column 14 can be fixed on the mounting seat 1 by welding or screw connection, or the spring limiting column 14 and the mounting seat 1 are preferably integrally formed. The mounting groove 141 has been seted up towards the one end of second opening 112 to the spacing post 14 of spring, and the one end that the guide shaft 12 kept away from case 21 can fixed connection in mounting groove 141, for example mounting groove 141 can be the screw hole, and the one end that the guide shaft 12 kept away from case 21 is provided with the external screw thread, and can pass through threaded connection at the screw hole, perhaps also can pass through the lock joint, the mode such as joint with guide shaft 12 demountable installation in mounting groove 141.
The guide shaft 12 is located between the spring limiting post 14 and the valve core 21, the valve core 21 can move along the guide shaft 12 towards or away from the second opening 112, the elastic member 13 is preferably a spring, one end of the elastic member can be sleeved outside the spring limiting post 14, and the other end of the elastic member can be sleeved at one end of the second portion 212 of the valve core 21 away from the first portion 211.
It should be noted that in a preferred embodiment, the spring forces the diaphragm 22 to the first position to close the second opening 112 in a free state, and the spring is in a normal state or a compressed state, in which the end of the second portion 212 remote from the first portion 211 is provided in a step shape, and the end of the spring abuts against the step structure to push the diaphragm 22 to close the second opening 112.
It should be noted that, the abutment member 40 may be detached from the second opening 112 of the air duct 11 in the mounting seat 1, the through hole 401 communicating with the air duct 11 is penetrated through the abutment member 40 along the path of the air duct 11, and the outer wall of the abutment member 40 is tightly attached to the inner wall of the air duct 11 at the second opening 112, so that the air flow inside the air duct 11 can only flow out through the through hole 401 when flowing to the second opening 112.
It should be noted that, one end of the through hole 401 is opposite to the diaphragm 22, and the radial dimension of the through hole 401 is smaller than that of the diaphragm 22, and the diaphragm 22 abuts against the through hole 401 of the abutting member 40 under the action of spring force in a free state, so as to seal one end of the through hole 401, so as to completely seal the second opening 112 of the air duct 11. Further, a boss 402 having a truncated cone shape is provided protruding from one end of the abutting piece 40 toward the diaphragm 22, and an abutting edge 403 is provided at one end of the boss 402 away from the abutting piece 40, so that the diaphragm 22 can abut on the abutting edge 403. By providing the abutment edge 403, the diaphragm 22 can abut on the abutment edge 403 so as to close the through hole 401.
In a specific embodiment, the inner wall of the air duct 11 is provided with a plurality of connecting grooves 50, and the position of the abutting piece 40 corresponding to the connecting grooves 50 is provided with a connecting block 51 in a protruding manner, or the abutting piece 40 is provided with a plurality of connecting grooves 50, and the inner wall of the air duct 11 is provided with a connecting block 51 in a protruding manner corresponding to the position of the connecting grooves 50. When the abutting piece 40 is inserted into the air duct 11, the connection block 51 can be inserted into the connection groove 50, and the connection block 51 can be engaged into the connection groove 50 by twisting the abutting piece 40, and the engaged state of the connection block 51 can be released by twisting the abutting piece 40 in the opposite direction, so that the detachable connection between the abutting piece 40 and the mount 1 can be realized.
Specifically, the connecting groove 50 includes a movable end 501 and a clamping end 502, the movable end 501 extends from the second opening 112 of the air duct 11 along the opening direction of the air duct 11, one end of the clamping end 502 is communicated with one end of the movable end 501 far away from the second opening 112, and the clamping end 502 and the movable end 501 are arranged at a preset included angle, which is preferably a right angle.
The connecting block 51 can be inserted into the movable end 501 and the clamping end 502, the abutting piece 40 can be inserted into the air duct 11 from the second opening 112, in the inserting process, the outer wall of the abutting piece 40 is tightly attached to the inner wall of the air duct 11, the connecting block 51 is aligned with the movable end 501, the connecting block 51 is inserted into the movable end 501, when the connecting block 51 moves to the connecting position of the clamping end 502 and the movable end 501, the abutting piece 40 is continuously moved to move the connecting block 51 to the opening path of the clamping end 502, then the abutting piece 40 is twisted, the connecting block 51 is driven to move into the clamping end 502, the abutting piece 40 can be prevented from moving along the air duct 11 by matching between the connecting block 51 and the clamping end 502, and the abutting piece 40 is stably installed in the air duct 11.
It should be noted that, at least one driving block 404 is further disposed at an end of the abutment 40 facing away from the boss 402, the abutment 40 can be lifted up by pinching the driving block 404, the abutment 40 is placed in the air duct 11, and when the abutment 40 moves to a corresponding position, the action of twisting the abutment 40 can be achieved by driving the driving block 404.
In order to increase the tightness between the abutting piece 40 and the mounting seat 1, a groove 405 is formed on the outer wall of the abutting piece 40 around the axis of the groove, a sealing ring 406 is sleeved in the groove 405, the sealing ring 406 is a rubber ring or a silica gel ring, and the like, the sealing ring 406 protrudes out of the outer wall of the abutting piece 40, and when the abutting piece 40 is inserted into the air duct 11, the sealing ring 406 abuts against the inner wall of the air duct 11 to increase the tightness.
In one embodiment, the driving assembly 30 is a solenoid valve, which has a movably disposed shaft core 31, and the solenoid valve is capable of driving the shaft core 31 to move, and the solenoid valve is of the prior art, and the internal structure and how the shaft core 31 moves are all of the prior art, which will not be described herein.
In the preferred embodiment, in the free state, the diaphragm 22 abuts against the abutting edge 403 to close the through hole 401, when the through hole 401 needs to be opened, the electromagnetic valve is started to work, the shaft core 31 is driven to move towards the diaphragm 22 through the through hole 401, and after the diaphragm 22 abuts against the diaphragm 22, the shaft core 31 is controlled to move continuously, so that the diaphragm 22 is forced to move towards the spring limiting post 14 away from the abutting edge 403 against the elastic force, and the through hole 401 is opened. When the through hole 401 needs to be closed again, only the electromagnetic valve needs to be closed, at this time, the shaft core 31 is in an active state, and under the action of spring force, the driving diaphragm 22 moves towards the abutting edge 403 again until abutting on the abutting edge 403, and the through hole 401 is closed again.
In a specific embodiment, referring to fig. 5, a clamping groove 311 is further provided on the shaft core 31, the clamping groove 311 is located at one end of the shaft core 31 close to the electromagnetic valve, a limiting member 312 is further sleeved on the shaft core 31, and a part of the limiting member 312 can be clamped in the clamping groove 311. The stopper 312 is located outside the solenoid valve, between the mount 1 and the solenoid valve, and when the diaphragm 22 is spring-driven to move toward the abutment edge 403, the stopper 312 also moves toward the valve body 6 of the solenoid valve, and when the diaphragm 22 is just abutted against the abutment edge 403, the stopper 312 is just abutted against the valve body 6 of the solenoid valve, or is about to be abutted against the valve body 6. By providing the stopper 312, the stop position of the shaft core 31 can be restricted, and the end of the shaft core 31 can be attached to the diaphragm 22 or be close to the diaphragm 22, so that the diaphragm 22 can be quickly driven to be separated from the abutting edge 403 next time, and the response speed can be increased.
On the other hand, referring to fig. 1 and 6, the embodiment of the invention further provides an air suction valve, which includes a valve body 6 and the above-mentioned safety valve, wherein the main air passage 61 through which the air flow flows is provided in the valve body 6, the first opening 111 of the safety valve is mounted on the valve body 6, and the first opening 111 of the air passage 11 is communicated with the main air passage 61. The air flow in the main air duct 61 can enter the air duct 11 through the first opening 111.
Specifically, one end of the valve body 6 is provided with a pressure relief port 62, and the pressure relief port 62 can be inserted and matched at the first opening 111 end of the air duct 11, and can be detachably connected through connection modes such as insertion, buckling, clamping or screwing, or the air suction valve and the safety valve can be integrated into a whole. The valve body 6 is also provided with a mounting frame 63, and the mounting seat 1 and the electromagnetic valve are both mounted on the mounting frame 63.
In yet another aspect, an embodiment of the present invention further provides a ventilator, including the inhalation valve described above.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211663720.7A CN115970121B (en) | 2022-12-23 | 2022-12-23 | Safety valve, inhalation valve and breathing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211663720.7A CN115970121B (en) | 2022-12-23 | 2022-12-23 | Safety valve, inhalation valve and breathing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115970121A CN115970121A (en) | 2023-04-18 |
| CN115970121B true CN115970121B (en) | 2025-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211663720.7A Active CN115970121B (en) | 2022-12-23 | 2022-12-23 | Safety valve, inhalation valve and breathing machine |
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| Country | Link |
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| CN (1) | CN115970121B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117695489A (en) * | 2023-12-26 | 2024-03-15 | 深圳市安保医疗科技股份有限公司 | Breathing machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101642598A (en) * | 2008-08-05 | 2010-02-10 | 北京谊安医疗系统股份有限公司 | Airway pressure relief valve |
| CN208097083U (en) * | 2017-08-09 | 2018-11-16 | 深圳融昕医疗科技有限公司 | Inlet valve and ventilator with bypass air flue |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1511226A (en) * | 1975-04-24 | 1978-05-17 | Nat Res Dev | Oxygen failure safety device |
| JP3353360B2 (en) * | 1993-01-13 | 2002-12-03 | 松下電器産業株式会社 | Gas shut-off valve |
| CN211835720U (en) * | 2019-11-18 | 2020-11-03 | 深圳市科曼医疗设备有限公司 | Modularization exhalation valve and have its breathing machine |
| CN214860338U (en) * | 2021-04-20 | 2021-11-26 | 深圳市明桦机电有限责任公司 | Breathing machine and valve |
| CN215635054U (en) * | 2021-08-04 | 2022-01-25 | 深圳市科曼医疗设备有限公司 | Breather valve and respirator applying same |
| CN217886713U (en) * | 2021-12-17 | 2022-11-25 | 河北谊安奥美医疗设备有限公司 | Air suction module with safety valve |
-
2022
- 2022-12-23 CN CN202211663720.7A patent/CN115970121B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101642598A (en) * | 2008-08-05 | 2010-02-10 | 北京谊安医疗系统股份有限公司 | Airway pressure relief valve |
| CN208097083U (en) * | 2017-08-09 | 2018-11-16 | 深圳融昕医疗科技有限公司 | Inlet valve and ventilator with bypass air flue |
Also Published As
| Publication number | Publication date |
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| CN115970121A (en) | 2023-04-18 |
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