CN221037528U - Bidirectional flow sensor and breathing machine - Google Patents
Bidirectional flow sensor and breathing machine Download PDFInfo
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- CN221037528U CN221037528U CN202323219348.3U CN202323219348U CN221037528U CN 221037528 U CN221037528 U CN 221037528U CN 202323219348 U CN202323219348 U CN 202323219348U CN 221037528 U CN221037528 U CN 221037528U
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 26
- 230000029058 respiratory gaseous exchange Effects 0.000 title abstract description 10
- 238000001514 detection method Methods 0.000 claims description 19
- 238000005070 sampling Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 95
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The embodiment of the application provides a bidirectional flow sensor and a breathing machine, and relates to the technical field of measurement. In a bi-directional flow sensor comprising a throttling element and a sensing element disposed within a channel body, the sensing element comprises a first sensing element and a second sensing element. The throttling element is arranged between the first detecting element and the second detecting element and is used for generating a pressure difference before and after the throttling element by changing the flow sectional area of the gas flow beam, the first detecting element is used for detecting the first gas pressure of the first side of the throttling element, the second detecting element is used for detecting the second gas pressure of the second side of the throttling element, and the gas flow in the channel main body is obtained according to the first gas pressure and the second gas pressure. Compared with the prior art, the gas flow can be obtained without considering the lengths of the front gas channel and the rear gas channel, and the structure is simpler.
Description
Technical Field
The application relates to the technical field of measurement, in particular to a bidirectional flow sensor and a breathing machine.
Background
A ventilator flow sensor is one of the core components of a ventilator, whose accuracy directly affects the performance and accuracy of the ventilator, which is an important life support device that plays a vital role in the treatment and rehabilitation of patients.
In the prior art, the flow of fluid is unstable due to the fact that the diameters of front and rear end pipelines of a flow sensor in the breathing machine are short, straight pipelines are short, and elbows are too many or accessories are additionally arranged, so that accurate measurement of flow is affected.
Disclosure of utility model
In order to overcome at least the above-mentioned shortcomings in the prior art, an object of the present application is to provide a bi-directional flow sensor.
In a first aspect, an embodiment of the present application provides a bidirectional flow sensor, where the bidirectional flow sensor includes a channel body, and a throttling element and a detecting element disposed in the channel body, where the throttling element includes a first side and a second side opposite to each other, and the detecting element includes a first detecting element disposed on the first side and a second detecting element disposed on the second side.
The channel main body is used for transmitting mixed gas, the throttling element is arranged between the first detecting element and the second detecting element and is used for generating pressure difference before and after the throttling element by changing the flow sectional area of a gas flow beam, the first detecting element is used for detecting first gas pressure of the first side, the second detecting element is used for detecting second gas pressure of the second side, and the gas flow in the channel main body is obtained according to the first gas pressure and the second gas pressure.
In one possible implementation, the channel body includes a first channel, a second channel, and a third channel that are sequentially communicated. The bidirectional flow sensor further comprises rectifying elements arranged in the first channel and the third channel and used for inhibiting generation of gas turbulence. The throttling element and the detecting element are arranged in the second channel, the first detecting element is used for detecting first gas pressure of gas between the first channel and the throttling element, and the second detecting element is used for detecting second gas pressure of gas between the third channel and the throttling element.
In one possible implementation manner, the rectifying element includes a first rectifying element and a second rectifying element, the first rectifying element is disposed on an inner wall of the first channel, the second rectifying element is disposed on an inner wall of the third channel, and the first rectifying element and the second rectifying element are symmetrically distributed on two sides of the throttling element.
In one possible implementation, the rectifying element includes a deflector fin that is integrally formed with the channel body.
In one possible implementation manner, the second channel further includes a first sampling port and a second sampling port symmetrically distributed on two sides of the throttling element, where the first sampling port is used for setting the first detecting element, and the second sampling port is used for setting the second detecting element.
In one possible implementation, the throttling element comprises a conical throttling structure, the central axis of which is perpendicular to the direction of extension of the channel body.
In one possible implementation, the filter element is used to rectify the gas into a gas with a uniform flow rate distribution. The filter element comprises a first filter element and a second filter element, the first filter element is arranged at one end of the first channel far away from the throttling element, the second filter element is arranged at one end of the third channel far away from the throttling element, and the first filter element and the second filter element are symmetrically distributed at two sides of the throttling element.
In one possible implementation, the first filter element and the second filter element comprise an etch-dense porous filter screen having a pore density that decreases from the middle to the periphery of the filter screen.
In one possible implementation, the materials of the bi-directional flow sensor include plastic and stainless steel.
In a second aspect, embodiments of the present application also provide a ventilator including any one of the bidirectional flow sensors of the first aspect.
Based on any one of the above aspects, the bidirectional flow sensor and the ventilator provided by the embodiments of the present application include a throttling element and a detecting element disposed in a channel main body, where the throttling element includes a first side and a second side opposite to each other, and the detecting element includes a first detecting element disposed on the first side and a second detecting element disposed on the second side. The throttling element is arranged between the first detecting element and the second detecting element and is used for generating a pressure difference before and after the throttling element by changing the flow sectional area of the gas flow beam, the first detecting element is used for detecting the first gas pressure of the first side, the second detecting element is used for detecting the second gas pressure of the second side, and the gas flow in the channel main body is obtained according to the first gas pressure and the second gas pressure. In the above-described structure, the throttle element generates a pressure difference between the front and rear of the throttle element by changing the flow cross-sectional area of the gas stream, and the first detecting element and the second detecting element can detect and obtain a pressure difference between the front and rear of the throttle element, from which a gas flow rate can be obtained. Compared with the prior art, the gas flow can be obtained without considering the lengths of the front gas channel and the rear gas channel, and the structure is simpler.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings required for the embodiments, it being understood that the following drawings illustrate only some embodiments of the present application and are therefore not to be considered limiting of the scope, and that other related drawings may be obtained according to these drawings without the inventive effort of a person skilled in the art.
FIG. 1 is a schematic diagram of one possible configuration of a bi-directional flow sensor according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a partial structure of a bidirectional flow sensor according to an embodiment of the present application;
FIG. 3 is a schematic diagram showing a partial structure of a bidirectional flow sensor according to an embodiment of the present application;
Fig. 4 is a schematic diagram of another possible structure of a bidirectional flow sensor according to an embodiment of the present application.
Icon:
10-a bi-directional flow sensor; 110-a channel body; 111-a first channel; 112-a second channel; 113-a third channel; 120-a throttling element; 130-a detection element; 131-a first detection element; 132-a second detection element; 140-rectifying elements; 141-a first rectifying element; 142-a second rectifying element; 150-a filter element; 151-a first filter element; 152-second filter element.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in specific cases.
It should be noted that, in the case of no conflict, different features in the embodiments of the present application may be combined with each other.
The bidirectional flow sensor 10 provided by the embodiment of the application can be applied to the technical field of respirators, but is not limited to the field of respirators, and is used for monitoring the respiratory flow of a patient in real time and ensuring the normal work of the respirators and the safety of the patient.
Referring to fig. 1, the bidirectional flow sensor 10 provided in the embodiment of the present application includes a channel main body 110, and a throttling element 120 and a detecting element 130 disposed in the channel main body 110, wherein the channel main body 110 is used for transmitting mixed gas, and the channel main body 110 can be used for transmitting appropriate air-oxygen mixed gas for a patient, or transmitting gas exhaled by the patient, for example.
The restriction 120 is used to generate a pressure difference between the front and rear of the restriction 120 by changing the flow cross-sectional area of the gas stream, and the gas flow in the channel body 110 can be obtained according to the pressure difference and a preset coefficient. The throttling element 120 includes a first side and a second side opposite to each other, the detecting element 130 includes a first detecting element 131 disposed on the first side and a second detecting element 132 disposed on the second side, the first detecting element 131 is configured to detect a first gas pressure of the gas on the first side, the second detecting element 132 is configured to detect a second gas pressure of the gas on the second side, and a pressure difference is obtained according to the first gas pressure and the second gas pressure. Illustratively, the bidirectional flow sensor 10 may further include a micro control chip for calculating the gas flow according to the first gas pressure and the second gas pressure, or when the bidirectional flow sensor 10 is applied to the ventilator, the detecting element may send the first gas pressure and the second gas pressure to a control host of the ventilator, and the control host may calculate the gas flow according to the first gas pressure and the second gas pressure.
In the above-described structure, the restriction element 120 is disposed between the first detection element 131 and the second detection element 132, the restriction element 120 generates a pressure difference between the front and rear of the restriction element 120 by changing the flow cross-sectional area of the gas stream, and the pressure difference between the front and rear of the restriction element 120 can be obtained by the first detection element 131 and the second detection element 132, thereby obtaining the gas flow rate. Compared with the prior art, the gas flow can be obtained without considering the lengths of the front gas channel and the rear gas channel, and the structure is simpler.
As a possible implementation manner of the embodiment of the present application, referring to fig. 2, the channel main body 110 includes a first channel 111, a second channel 112 and a third channel 113 that are sequentially communicated, the first channel 111 and the third channel 113 may be symmetrically disposed on two sides of the second channel 112, specifically, the first channel 111 may be disposed on a first side of the throttling element 120, and the third channel 113 may be disposed on a second side of the throttling element 120.
The bidirectional flow sensor 10 further includes a rectifying element 140 disposed in the first channel 111 and the third channel 113, for suppressing generation of turbulent flow of gas, specifically, the rectifying element 140 includes a first rectifying element 141 and a second rectifying element 142, the first rectifying element 141 is disposed on an inner wall of the first channel 111, the second rectifying element 142 is disposed on an inner wall of the third channel 113, and the first rectifying element 141 and the second rectifying element 142 are symmetrically disposed on two sides of the throttling element 120. Illustratively, when the first passage 111 is connected to the air inlet and the third passage 113 is connected to the air outlet, the first rectifying element 141 may enhance the stability of the air flow by suppressing the generation of the turbulence of the air, thereby ensuring the flow rate detection accuracy, and the second rectifying element 142 may further suppress the generation of the turbulence of the air, thereby enhancing the comfort of the patient while providing more reliable ventilation to the patient. The rectifying element 140 includes a guide fin, which may be integrally formed with the channel body 110.
The throttling element 120 and the detecting element 130 are disposed in the second channel 112, the first detecting element 131 is configured to detect a first gas pressure of the gas between the first channel 111 and the throttling element 120, the second detecting element 132 is configured to detect a second gas pressure of the gas between the third channel 113 and the throttling element 120, and the gas flow in the channel body 110 is obtained according to the first gas pressure and the second gas pressure.
Further, the second channel 112 further includes a first sampling port and a second sampling port symmetrically distributed on two sides of the throttling element 120, the first sampling port is used for setting the first detecting element 131, and the second sampling port is used for setting the second detecting element 132. Illustratively, the first and second sensing elements 131, 132 may include pressure probes that may sense the pressure of the gas within the channel body 110 through the first and second sampling ports. Further, a fixing member for fixing the detection element 130 may be provided outside the second passage 112 to facilitate the installation of the detection element 130.
As a possible implementation manner of the embodiment of the present application, please refer to fig. 2 again, the throttling element 120 includes a conical streamline structure, and a central axis of the throttling element 120 is perpendicular to an extending direction of the channel main body 110. Illustratively, and referring to the figures, the throttling element 120 may include four gas path passages, each of which has a width that increases gradually from a position of a central axis of the throttling element 120 to both sides, and illustratively, a cross-sectional area of the gas stream decreases gradually when the gas flows from the first passage 111 to the central axis of the throttling element 120, and a cross-sectional area of the gas stream increases gradually when the gas flows from the central axis of the throttling element 120 to the third passage 113, thereby generating a pressure difference between the first side and the second side of the throttling element 120.
As a possible implementation manner of the embodiment of the present application, please refer to fig. 3 and 4, the bidirectional flow sensor 10 further includes a filter element 150, and the filter element 150 not only can rectify the gas into the gas with uniform flow velocity distribution, but also can filter impurities in the gas, so as to better help the patient perform the breathing action and improve the comfort of the patient. Further, the filter element 150 may include a first filter element 151 and a second filter element 152, where the first filter element 151 is disposed at an end of the first channel 111 away from the throttling element 120, and the second filter element 152 is disposed at an end of the third channel 113 away from the throttling element 120, and the first filter element 151 and the second filter element 152 are symmetrically distributed on two sides of the throttling element 120, and the first filter element 151 and the second filter element 152 include an etching dense porous filter screen, where the pore density of the etching dense porous filter screen decreases from the middle to the periphery of the filter screen, so as to rectify the gas, and achieve uniformity of gas flow velocity distribution. For example, when the first channel 111 is in communication with the turbine module of the ventilator, the air-oxygen mixture output by the turbine module may have a high flow rate, the first filter element 151 rectifies the air-oxygen mixture, and the air-oxygen mixture flows at a high speed from the center, but gradually flows in a circumferential direction, so that the air-oxygen mixture with uniformly distributed flow rate is finally obtained, and the detection accuracy is improved.
As one possible implementation of the embodiment of the present application, the material of the bidirectional flow sensor 10 includes Plastic (PC) and stainless steel, and preferably, the material of the bidirectional flow sensor 10 may be Plastic (PC).
Based on the same inventive concept, the embodiment of the present application further provides a ventilator including any of the above two-way flow sensors 10, wherein the two-way flow sensor 10 includes a channel main body 110, and a throttling element 120 and a detecting element disposed in the channel main body 110. The channel main body 110 is used for transmitting mixed gas, for example, one end of the channel main body 110 can be connected with a turbine module of a breathing machine, and the other end of the channel main body can be connected with a gas transmission port of the breathing machine, so as to transmit proper air-oxygen mixed gas for a patient and transmit gas exhaled by the patient. The restriction 120 is used to generate a pressure difference between the front and rear of the restriction 120 by changing the flow cross-sectional area of the gas stream, and the gas flow in the channel body 110 can be obtained according to the pressure difference and a preset coefficient. The throttling element 120 includes a first side and a second side opposite to each other, the detecting element includes a first detecting element 131 disposed on the first side and a second detecting element 132 disposed on the second side, the first detecting element 131 is configured to detect a first gas pressure of the gas on the first side, the second detecting element 132 is configured to detect a second gas pressure of the gas on the second side, and a pressure difference is obtained according to the first gas pressure and the second gas pressure. The detection element can send the first gas pressure and the second gas pressure to a control host of the breathing machine, and the control host can calculate the breathing flow of the patient according to the first gas pressure and the second gas pressure, so that the purpose of bidirectional measurement is achieved. In addition, the bidirectional flow sensor 10 further includes a rectifying element and a filtering element, which can enhance the stability of the air flow by suppressing the generation of the turbulent flow of the air, thereby ensuring the flow detection accuracy.
In summary, the embodiment of the application provides a bidirectional flow sensor and a ventilator, wherein the bidirectional flow sensor includes a throttling element and a detecting element disposed in a channel main body, and the detecting element includes a first detecting element and a second detecting element. The throttling element is arranged between the first detecting element and the second detecting element and is used for generating a pressure difference before and after the throttling element by changing the flow sectional area of the gas flow beam, the first detecting element is used for detecting the first gas pressure of the first side of the throttling element, the second detecting element is used for detecting the second gas pressure of the second side of the throttling element, and the gas flow in the channel main body is obtained according to the first gas pressure and the second gas pressure. In the above-described structure, the throttle element generates a pressure difference between the front and rear of the throttle element by changing the flow cross-sectional area of the gas stream, and the first detecting element and the second detecting element can detect and obtain a pressure difference between the front and rear of the throttle element, from which a gas flow rate can be obtained. Compared with the prior art, the gas flow can be obtained without considering the lengths of the front gas channel and the rear gas channel, and the structure is simpler.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The bidirectional flow sensor is characterized by comprising a channel main body, a throttling element and a detection element, wherein the throttling element is arranged in the channel main body and comprises a first side and a second side which are opposite, and the detection element comprises a first detection element arranged on the first side and a second detection element arranged on the second side;
the channel main body is used for conveying mixed gas;
The throttling element is arranged between the first detecting element and the second detecting element and is used for generating pressure difference before and after the throttling element by changing the flow sectional area of the gas flow beam;
The first detection element is used for detecting the first gas pressure of the first side, the second detection element is used for detecting the second gas pressure of the second side, and the gas flow in the channel main body is obtained according to the first gas pressure and the second gas pressure.
2. The bi-directional flow sensor of claim 1, wherein the channel body comprises a first channel, a second channel, and a third channel that are in sequential communication;
The bidirectional flow sensor further comprises rectifying elements arranged in the first channel and the third channel and used for inhibiting generation of gas turbulence;
The throttling element and the detecting element are arranged in the second channel, the first detecting element is used for detecting first gas pressure of gas between the first channel and the throttling element, and the second detecting element is used for detecting second gas pressure of gas between the third channel and the throttling element.
3. The bi-directional flow sensor of claim 2, wherein the rectifying element comprises a first rectifying element and a second rectifying element, the first rectifying element is disposed on an inner wall of the first channel, the second rectifying element is disposed on an inner wall of the third channel, and the first rectifying element and the second rectifying element are symmetrically distributed on two sides of the throttling element.
4. The bi-directional flow sensor of claim 2 wherein said rectifying element comprises a deflector fin integrally formed with said channel body.
5. The bi-directional flow sensor of claim 2, wherein the second channel further comprises a first sampling port and a second sampling port symmetrically disposed on both sides of the throttling element, the first sampling port being configured to provide the first sensing element and the second sampling port being configured to provide the second sensing element.
6. The bi-directional flow sensor of claim 1 wherein the throttling element comprises a conical throttling structure, a central axis of the throttling element being perpendicular to a direction of extension of the channel body.
7. The bi-directional flow sensor of claim 2, further comprising a filter element for rectifying gas into a uniformly distributed flow rate gas;
The filter element comprises a first filter element and a second filter element, the first filter element is arranged at one end of the first channel far away from the throttling element, the second filter element is arranged at one end of the third channel far away from the throttling element, and the first filter element and the second filter element are symmetrically distributed at two sides of the throttling element.
8. The bi-directional flow sensor of claim 7, wherein the first filter element and the second filter element comprise an etch-dense porous filter screen having a decreasing pore density from the middle to the periphery of the filter screen.
9. The bi-directional flow sensor of claim 1 wherein the material of the bi-directional flow sensor comprises plastic and stainless steel.
10. A ventilator comprising the bi-directional flow sensor of any of the preceding claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323219348.3U CN221037528U (en) | 2023-11-27 | 2023-11-27 | Bidirectional flow sensor and breathing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323219348.3U CN221037528U (en) | 2023-11-27 | 2023-11-27 | Bidirectional flow sensor and breathing machine |
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| Publication Number | Publication Date |
|---|---|
| CN221037528U true CN221037528U (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323219348.3U Active CN221037528U (en) | 2023-11-27 | 2023-11-27 | Bidirectional flow sensor and breathing machine |
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| Country | Link |
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| CN (1) | CN221037528U (en) |
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2023
- 2023-11-27 CN CN202323219348.3U patent/CN221037528U/en active Active
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