CN110302457B - One-way valve, breathing machine and intranasal high-flow oxygen therapy device - Google Patents
One-way valve, breathing machine and intranasal high-flow oxygen therapy device Download PDFInfo
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- CN110302457B CN110302457B CN201910614344.4A CN201910614344A CN110302457B CN 110302457 B CN110302457 B CN 110302457B CN 201910614344 A CN201910614344 A CN 201910614344A CN 110302457 B CN110302457 B CN 110302457B
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- valve
- spool
- sidewall
- airflow
- free end
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- 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
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- 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
-
- 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory devices
- A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
Abstract
The invention discloses a one-way valve, a breathing machine and a transnasal high-flow oxygen therapy device, wherein the one-way valve comprises: a support and a flexible membrane. The support includes disk seat and the case that links to each other, prescribes a limit to between disk seat and the case and is suitable for the passageway that the air current flows, and the passageway has air current import and gas flow outlet, is formed with the recess that extends along the circumference of case on the periphery wall of case, and flexible diaphragm cover is established on the support, and flexible diaphragm includes continuous fixed part and movable part, and the fixed part cover is established on the disk seat, and movable part movably overlaps and establishes in order to open and close the air current export on the case, and the free end of movable part is suitable for the cooperation in the recess. According to the one-way valve provided by the embodiment of the invention, the side airflow interference or the free end of the flexible membrane blown up by the side airflow under the low-pressure airflow can be avoided, so that the one-way check function of the one-way valve can be realized more reliably.
Description
Technical Field
The invention relates to the field of valve devices, in particular to a one-way valve, a breathing machine and a transnasal high-flow oxygen therapy device.
Background
The one-way valve realizes the function of one-way check in the pipeline, for example, in medical instruments such as a transnasal high-flow oxygen therapy device and a breathing machine, two air channels and oxygen channels are usually provided, the two gases respectively flow out from the respective air channels according to a certain proportion, and finally are converged into mixed gas with a certain oxygen concentration for a patient to use. In order to ensure the accurate proportion of the mixed gas, a one-way valve is arranged in the gas path before mixing so as to prevent the gas from flowing back and mixing. However, the check valve in the related art can perform a check function in a relatively high pressure air flow, but a leakage phenomenon may occur in a certain low pressure air flow environment. Therefore, the check effect of the check valve in the related art is not ideal from the viewpoint of one-way cutoff of the air flow.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention proposes a check valve that can achieve a one-way check function more reliably.
The invention also provides a breathing machine with the one-way valve.
The invention also provides a transnasal high-flow oxygen therapy device with the one-way valve.
A check valve according to an embodiment of the first aspect of the invention comprises: the support comprises a valve seat and a valve core which are connected, a channel suitable for airflow is defined between the valve seat and the valve core, the channel is provided with an airflow inlet and an airflow outlet, and a groove extending along the circumferential direction of the valve core is formed on the outer circumferential wall of the valve core; the flexible diaphragm is sleeved on the support and comprises a fixed part and a movable part which are connected, the fixed part is sleeved on the valve seat, the movable part is movably sleeved on the valve element to open and close the air outlet, and the free end of the movable part is suitable for being matched in the groove.
According to the one-way valve provided by the embodiment of the invention, the valve core is provided with the groove, the free end of the movable part is suitable for being matched in the groove, when the movable part of the flexible membrane is stressed or unstressed reversely, the free end of the movable part is matched in the groove, and the free end of the movable part is attached to or closely contacted with the side wall of the groove, so that the side airflow interference or the blowing-up of the free end of the flexible membrane under the low-pressure airflow can be avoided, and the one-way non-return effect of the one-way valve can be more reliably realized.
According to some embodiments of the invention, the groove includes a first side wall extending in a circumferential direction of the spool, the first side wall extending obliquely toward a direction adjacent to the gas flow inlet port in a direction from a central axis of the spool to an outer circumferential wall of the spool.
According to some alternative embodiments of the invention, the movable portion abuts the first side wall when the free end of the movable portion is fitted in the recess.
According to some alternative embodiments of the present invention, the movable portion extends obliquely toward a direction adjacent to the airflow inlet in a direction from the central axis of the valve element to the outer peripheral wall of the valve element.
According to some optional embodiments of the invention, an angle between the first side wall and the central axis of the valve core is α, and α satisfies: alpha is more than or equal to 45 degrees and less than or equal to 60 degrees.
According to some alternative embodiments of the present invention, the groove includes a second side wall extending in a circumferential direction of the spool, the second side wall being disposed opposite to the first side wall in an axial direction of the spool.
Alternatively, the second side wall may extend obliquely toward a direction adjacent to the gas flow outlet in a direction from the central axis of the valve body to the outer peripheral wall of the valve body.
Further, an included angle between the second side wall and the central axis of the valve core is β, and β satisfies: beta is more than or equal to 30 degrees and less than or equal to 45 degrees.
Optionally, when the free end of the movable part is fitted in the groove, there is a gap between the free end of the movable part and the second side wall.
Optionally, the second side wall is in smooth transition connection with the outer peripheral wall of the valve core.
According to some embodiments of the present invention, a positioning groove is formed on one of the outer peripheral wall of the valve seat and the inner peripheral wall of the fixing portion, and a positioning projection that is fitted with the positioning groove is formed on one of the outer peripheral wall of the valve seat and the inner peripheral wall of the fixing portion.
According to some embodiments of the present invention, the airflow outlet includes a plurality of sub airflow outlets arranged at intervals in a circumferential direction of the valve element, the movable portion is plural and the movable portions are arranged at intervals in the circumferential direction of the valve element, the number of the movable portions is the same as the number of the sub airflow outlets and corresponds to one, and each of the movable portions opens and closes the corresponding sub airflow outlet.
A ventilator according to an embodiment of the second aspect of the invention, comprising: the check valve according to the above embodiment of the first aspect of the invention.
According to the breathing machine provided by the embodiment of the invention, the one-way check function of the one-way valve can be more reliably realized by arranging the one-way valve, the working reliability of the one-way valve is improved, and the working reliability of the breathing machine can be improved.
A nasal high flow oxygen therapy device according to an embodiment of the third aspect of the present invention, comprising: the check valve according to the above embodiment of the first aspect of the invention.
According to the transnasal high-flow oxygen therapy device provided by the embodiment of the invention, the one-way check function of the one-way valve can be realized more reliably by arranging the one-way valve, the working reliability of the one-way valve is improved, and the working reliability of the transnasal high-flow oxygen therapy device can be improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a perspective view of a one-way valve according to an embodiment of the present invention;
FIG. 2 is a front view of a one-way valve according to an embodiment of the invention;
FIG. 3 is a cross-sectional view taken along line C-C of FIG. 2;
fig. 4 is a partially enlarged view at D in fig. 3.
Reference numerals:
a check valve 100;
a bracket 1; a valve seat 11; a positioning boss 111; a valve core 12; a groove 121; a first sidewall 1211; a second sidewall 1212;
a flexible membrane 2; a fixed portion 21; a positioning groove 211; a movable portion 22; a free end 221;
a channel 3; a gas flow inlet 31; a gas flow outlet 32; the sub airflow outlet 321.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A check valve 100 according to an embodiment of the present invention is described below with reference to fig. 1-4. The one-way valve 100 may be used in a medical device.
Referring to fig. 1-4, a check valve 100 according to an embodiment of the first aspect of the present invention includes: the support comprises a support 1 and a flexible membrane 2, wherein the flexible membrane 2 is sleeved on the support 1, the support 1 supports the flexible membrane 2, the support 1 comprises a valve seat 11 and a valve core 12 which are connected, a channel 3 suitable for airflow flowing is defined between the valve seat 11 and the valve core 12, the channel 3 is provided with an airflow inlet 31 and an airflow outlet 32, and a groove 121 extending along the circumferential direction of the valve core 12 is formed on the outer circumferential wall of the valve core 12.
The flexible diaphragm 2 has elastic deformation capability, the flexible diaphragm 2 comprises a fixed part 21 and a movable part 22 which are connected, the fixed part 21 can be cylindrical, the fixed part 21 is sleeved on the valve seat 11, the movable part 22 is movably sleeved on the valve core 12 to open and close the airflow outlet 32, and the free end 221 of the movable part 22 is suitable for being matched in the groove 121.
When the airflow flows to the check valve 100 along the forward direction (the forward direction is a direction from the airflow inlet 31 to the airflow outlet 32), the airflow enters the channel 3 from the airflow inlet 31, the forward airflow applies a pressure to the movable portion 22 of the flexible diaphragm 2 in a direction away from the airflow inlet 31 to push the movable portion 22 of the flexible diaphragm 2 to move in a direction away from the airflow inlet 31, the free end 221 of the movable portion 22 is separated from the groove 121 on the valve core, the flexible diaphragm 2 is expanded under the force, the movable portion 22 of the flexible diaphragm 2 opens the airflow outlet 32 at this time, the airflow entering the channel 3 flows out from the airflow outlet 32, and the airflow can smoothly pass through the channel, so that the one-way conduction function of the check valve 100 is realized.
When the air flow flows to the check valve 100 in the reverse direction (the reverse direction refers to the direction from the air flow outlet 32 to the air flow inlet 31), the air flow applies pressure to the movable portion 22 of the flexible diaphragm 2 in the direction adjacent to the air flow inlet 32, the movable portion 22 of the flexible diaphragm 2 is pushed to move in the direction adjacent to the air flow inlet 32, the free end 221 of the movable portion 22 is fitted into the groove 121 on the valve core 12, at this time, the movable portion 22 of the flexible diaphragm 2 closes the air flow outlet 32, the free end 221 of the movable portion 22 can be tightly attached to the side wall of the groove 121, the air flow cannot pass through, the sealing effect is achieved, and the one-way check function of the check valve 100 is achieved.
Moreover, even under the condition of low-pressure airflow (refer to fig. 4, the direction of the arrow in fig. 4 is the airflow flowing direction), because the free end 221 of the movable part 22 is matched with the groove 121 of the valve core, the valve core 12 is directly contacted when the airflow comes from the side surface, the airflow changes the direction after encountering the wall surface of the valve core 12, and the free end 221 of the movable part 22 can be ensured not to be deformed due to the lateral force, so that the side airflow is prevented from interfering or blowing up the free end 221 of the flexible membrane 2, the problem of gas leakage is effectively improved, and the one-way non-return function of the one-way valve 100 is more reliably realized.
When the flexible diaphragm 2 is not stressed, referring to fig. 3 and 4, since the free end 221 of the movable portion 22 is fitted into the groove 121 on the valve core 12, at this time, the movable portion 22 of the flexible diaphragm 2 closes the airflow outlet 32, which can prevent the airflow from flowing back and realize the one-way check function of the check valve 100.
According to the check valve 100 of the embodiment of the invention, the groove 121 is arranged on the valve core 12, and the free end 221 of the movable part 22 is suitable for being matched in the groove 121, when the movable part 22 of the flexible diaphragm 2 is stressed or unstressed in the reverse direction, the free end 221 of the movable part 22 is matched in the groove 121, and the free end 221 of the movable part 22 can be attached to or closely contacted with the side wall of the groove 121, so that the side airflow interference or blowing-up of the free end 221 of the flexible diaphragm 2 under the low-pressure airflow can be avoided, and the one-way check function of the check valve 100 can be realized more reliably.
According to some embodiments of the present invention, as shown in fig. 3 and 4, the groove 121 includes a first sidewall 1211 extending in a circumferential direction of the spool 12, the first sidewall 1211 extending obliquely toward a direction adjacent to the gas flow inlet 31 in a direction from a central axis of the spool 12 to an outer circumferential wall of the spool 12. Therefore, when the free end 221 of the movable portion 22 is fitted in the groove 121, the first sidewall 1211 of the groove 121 can act as a stopper for the free end 221 of the movable portion 22 when the airflow flows in the reverse direction by the engagement of the free end 221 of the movable portion 22 and the first sidewall 1211 of the groove 121, so as to prevent the free end 221 of the movable portion 22 from being separated from the groove 121, ensure the sealing performance, and realize the one-way non-return function of the one-way valve 100. Also, by making the first sidewall 1211 extend obliquely toward the direction adjacent to the air flow inlet 31, in the case where the depth of the groove 121 is constant, the area of the first sidewall 1211 can be increased, so that the sealing property can be further improved.
According to some alternative embodiments of the present invention, as shown in fig. 3 and 4, when the free end 221 of the movable portion 22 is fitted in the groove 121, the movable portion 22 is attached to the first sidewall 1211, and when the air flow flows in the reverse direction to the check valve 100, the movable portion 22 is more closely attached to the first sidewall 1211, so that the sealing performance can be further improved, the leakage can be better prevented, and the check function of the check valve 100 can be better achieved.
According to some alternative embodiments of the present invention, as shown in fig. 3 and 4, the movable portion 22 extends obliquely toward the direction adjacent to the gas flow inlet 32 in the direction from the central axis of the spool 12 to the outer peripheral wall of the spool 12, for example, the movable portion 22 may be formed in a conical shape. Therefore, the contact area between the movable portion 22 and the first sidewall 1211 can be increased, which is beneficial to the air flow to press the free end 221 of the movable portion 22 against the first sidewall 1211 when the air flow flows to the check valve 100 in the reverse direction, and is more beneficial to reliably realize the one-way check function of the check valve 100.
According to some alternative embodiments of the present invention, as shown in fig. 3 and 4, the included angle between the first sidewall 1211 and the central axis of the valve core 12 is α, and α satisfies: alpha is more than or equal to 45 degrees and less than or equal to 60 degrees. Therefore, the movable portion 22 and the first sidewall 1211 can have a larger contact area, and when the airflow flows to the check valve 100 in the reverse direction, the vertical component of the airflow to the movable portion 22 (i.e. the component of the pressure of the airflow to the movable portion 22 in the direction perpendicular to the movable portion 22) is larger, which is more beneficial for the airflow to press the free end 221 of the movable portion 22 against the first sidewall 1211, and the sealing effect is better.
According to some alternative embodiments of the present invention, as shown in fig. 3 and 4, the groove 121 includes a second sidewall 1212 extending in the circumferential direction of the spool 12, the second sidewall 1212 being disposed opposite to the first sidewall 1212 in the axial direction of the spool 12. Therefore, when the airflow flows in the reverse direction toward the check valve 100 (see fig. 4, the direction of the arrow in fig. 4 is the airflow flowing direction), the second side wall 1212 functions as a blocking function for the airflow, and prevents the reverse airflow from flowing into the bottom of the free end 221 of the movable portion 22 from the side surface and interfering with the free end 221 of the movable portion 22, thereby preventing the free end 221 of the movable portion 22 from being blown up and leaking, further ensuring the sealing effect, and further improving the reliability of the check valve 100.
Alternatively, as shown in fig. 3 and 4, the second side wall 1212 extends obliquely toward the direction adjacent to the airflow outlet 31 in the direction from the central axis of the spool 12 to the outer peripheral wall of the spool 12. Therefore, when the air flow flows to the check valve 100 in the reverse direction, the second sidewall 1212 can block the air flow from flowing to the bottom of the free end 221 of the movable portion 22 to interfere with the free end 221 of the movable portion 22, and when the air flow flows in the forward direction, the free end 221 of the movable portion 22 is easy to be separated from the groove 121 of the valve element 12, which is beneficial to better realize the functions of one-way conduction and non-return of the check valve 100.
Further, as shown in fig. 3 and 4, the angle between the second sidewall 1212 and the central axis of the spool 12 is β, where β satisfies: beta is more than or equal to 30 degrees and less than or equal to 45 degrees. Therefore, by setting the included angle β between the second side wall 1212 and the central axis of the valve core 12 within the above range, when the air flow flows in the reverse direction to the check valve 100, the second side wall 1212 can better block the air flow from flowing to the bottom of the free end 221 of the movable portion 22 to interfere with the free end 221 of the movable portion 22, and when the air flow flows in the forward direction, the free end 221 of the movable portion 22 can be more easily separated from the groove 121 of the valve core 12, which is beneficial to better achieving the functions of one-way conduction and non-return of the check valve 100.
Alternatively, the first sidewall 1211 and the second sidewall 1212 of the groove 121 may be vertically disposed, so that the shape of the groove 121 is adapted to the shape of the free end 221 of the movable portion 22 for better sealing effect. For example, the angle α between the first sidewall 1211 and the central axis of the valve spool 12 is 45 °, and the angle β between the second sidewall 1212 and the central axis of the valve spool 12 is 45 °.
Alternatively, as shown in fig. 3 and 4, when the free end 221 of the movable portion 22 is fitted in the groove 121, there is a gap between the free end 221 of the movable portion 22 and the second side wall 1212. Thus, when the air flow flows to the check valve 100 in the forward direction, the free end 221 of the movable portion 22 is more easily separated from the groove 121 of the valve core 12 due to the gap between the free end 221 of the movable portion 22 and the second side wall 1212, so that the opening of the air flow outlet 32 is more easily achieved.
Alternatively, as shown in fig. 3 and 4, the second sidewall 1212 is in smooth transition with the outer peripheral wall of the valve core 12. Thereby, the resistance of the free end 221 of the movable part 22 to escape from the groove 121 can be reduced, and the wear of the free end 221 of the movable part 22 can be reduced.
According to some embodiments of the present invention, as shown in fig. 3, one of the outer circumferential wall of the valve seat 11 and the inner circumferential wall of the fixing portion 21 is formed with a positioning groove 211, the positioning groove 211 may be formed in a ring shape extending in the circumferential direction, one of the outer circumferential wall of the valve seat 11 and the inner circumferential wall of the fixing portion 21 is formed with a positioning projection 111 that is fitted with the positioning groove 211, and the positioning projection 111 may be formed in a ring shape extending in the circumferential direction. For example, when the positioning groove 211 is formed on the outer circumferential wall of the valve seat 11, the positioning projection 111 is formed on the inner circumferential wall of the fixing portion 21; when the positioning projection 111 is formed on the outer peripheral wall of the valve seat 11, the positioning groove 211 is formed on the inner peripheral wall of the fixing portion 21. Thus, the fixing portion 22 of the flexible diaphragm 2 can be fixed to the valve seat 11 by the engagement of the positioning protrusion 111 and the positioning groove 211, and the fixing portion 22 is prevented from moving.
According to some embodiments of the present invention, as shown in fig. 1 to 4, the airflow outlet 32 includes a plurality of (e.g., two) sub airflow outlets 321 arranged at intervals in a circumferential direction of the valve core 12, the movable portion 22 is a plurality and a plurality of movable portions 22 are arranged at intervals in the circumferential direction of the valve core 12, the number of the movable portions 22 is the same as the number of the sub airflow outlets 321, and corresponds to one another, and each movable portion 22 opens and closes the corresponding sub airflow outlet 321. Thereby, the flexibility of each movable portion 22 can be further improved, so that the opening and closing operation of the airflow outlet 32 is smoother.
A ventilator according to an embodiment of the second aspect of the invention, comprising: the check valve 100 according to the above-described embodiment of the first aspect of the present invention.
According to the respirator of the embodiment of the invention, the one-way check valve 100 is arranged, so that the one-way reverse blocking effect of the one-way check valve 100 can be more reliably realized, the working reliability of the one-way check valve 100 is improved, and the working reliability of the respirator can be improved.
A nasal high flow oxygen therapy device according to an embodiment of the third aspect of the present invention, comprising: the check valve 100 according to the above-described embodiment of the first aspect of the present invention.
According to the transnasal high-flow oxygen therapy device of the embodiment of the invention, the one-way check function of the one-way valve 100 can be more reliably realized by arranging the one-way valve 100, the working reliability of the one-way valve 100 is improved, and the working reliability of the transnasal high-flow oxygen therapy device can be improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (14)
1. A check valve, comprising:
the support comprises a valve seat and a valve core which are connected, a channel suitable for airflow is defined between the valve seat and the valve core, the channel is provided with an airflow inlet and an airflow outlet, and a groove extending along the circumferential direction of the valve core is formed on the outer circumferential wall of the valve core;
the flexible diaphragm is sleeved on the support and comprises a fixed part and a movable part which are connected, the fixed part is sleeved on the valve seat, the movable part is movably sleeved on the valve element to open and close the air outlet, and the free end of the movable part is suitable for being matched in the groove.
2. The check valve of claim 1, wherein the groove includes a first sidewall extending in a circumferential direction of the spool, the first sidewall extending obliquely toward a direction adjacent to the gas flow inlet in a direction from a central axis of the spool to an outer peripheral wall of the spool.
3. The one-way valve of claim 2, wherein the movable portion abuts the first sidewall when the free end of the movable portion is fitted within the recess.
4. The check valve according to claim 2, wherein the movable portion extends obliquely toward a direction adjacent to the gas flow inlet in a direction from a central axis of the spool to an outer peripheral wall of the spool.
5. The check valve of claim 2, wherein an angle between the first sidewall and a central axis of the spool is α, wherein α satisfies: alpha is more than or equal to 45 degrees and less than or equal to 60 degrees.
6. The check valve of claim 2, wherein the groove includes a second sidewall extending in a circumferential direction of the spool, the second sidewall being disposed opposite the first sidewall in an axial direction of the spool.
7. The check valve of claim 6, wherein the second side wall extends obliquely toward a direction adjacent to the gas flow outlet in a direction from the central axis of the spool to the outer peripheral wall of the spool.
8. The check valve of claim 7, wherein an angle between the second sidewall and a central axis of the spool is β, wherein β satisfies: beta is more than or equal to 30 degrees and less than or equal to 45 degrees.
9. The one-way valve of claim 6, wherein there is a gap between the free end of the movable portion and the second sidewall when the free end of the movable portion is fitted within the recess.
10. The check valve of claim 6, wherein the second sidewall is in smooth transition with the peripheral wall of the poppet.
11. The check valve according to claim 1, wherein a positioning groove is formed on one of an outer peripheral wall of the valve seat and an inner peripheral wall of the fixing portion, and a positioning projection that engages with the positioning groove is formed on the other of the outer peripheral wall of the valve seat and the inner peripheral wall of the fixing portion.
12. The check valve of any of claims 1-11, wherein the airflow outlet includes a plurality of sub airflow outlets spaced apart along a circumferential direction of the valve element, the movable portion is plural and the movable portions are spaced apart along the circumferential direction of the valve element, the number of the movable portions is the same as the number of the sub airflow outlets and corresponds to one, and each of the movable portions opens and closes the corresponding sub airflow outlet.
13. A ventilator, comprising: a one-way valve according to any one of claims 1 to 12.
14. A transnasal high flow oxygen therapy device, comprising: a one-way valve according to any one of claims 1 to 12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614344.4A CN110302457B (en) | 2019-07-09 | 2019-07-09 | One-way valve, breathing machine and intranasal high-flow oxygen therapy device |
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| CN201910614344.4A CN110302457B (en) | 2019-07-09 | 2019-07-09 | One-way valve, breathing machine and intranasal high-flow oxygen therapy device |
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| CN110302457A CN110302457A (en) | 2019-10-08 |
| CN110302457B true CN110302457B (en) | 2022-05-17 |
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| CN111529869A (en) * | 2020-05-29 | 2020-08-14 | 重庆医科大学附属儿童医院 | Loop type anesthesia ventilation system |
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| CN205350450U (en) * | 2016-03-03 | 2016-06-29 | 新昌县富士精工科技有限公司 | Amortization check valve |
| CN206433819U (en) * | 2016-11-17 | 2017-08-25 | 阮东方 | Check valve and mouth mask for mouth mask |
| CN106762603A (en) * | 2016-12-14 | 2017-05-31 | 贵州航天林泉电机有限公司 | A kind of stiffness-adjustable check valve |
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| CN110302457A (en) | 2019-10-08 |
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