CN220982352U - Airflow sensor - Google Patents
Airflow sensor Download PDFInfo
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- CN220982352U CN220982352U CN202323101991.6U CN202323101991U CN220982352U CN 220982352 U CN220982352 U CN 220982352U CN 202323101991 U CN202323101991 U CN 202323101991U CN 220982352 U CN220982352 U CN 220982352U
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- plate
- circuit board
- capacitor
- shell
- sensor according
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- 239000003990 capacitor Substances 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 description 9
- 239000012535 impurity Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The utility model discloses an airflow sensor, which relates to the field of sensors, and the technical scheme of the utility model comprises a shell, a circuit board, a first capacitor polar plate and a second capacitor polar plate; the shell is wholly or partially a conductor, one end of the shell is provided with and electrically connected with the circuit board, and the inner surface of the circuit board is provided with and electrically connected with the first capacitor plate; the other end of the shell is provided with and electrically connected with the second capacitor pole plate, the plate surface of the second capacitor pole plate is deformed under pressure, and the first capacitor pole plate and the second capacitor pole plate are oppositely arranged. The structure is more simplified, the volume is smaller, the cost is lower, the performance is more stable and excellent, and the detection of complete airflow can be good.
Description
Technical Field
The utility model relates to the field of sensors, in particular to an airflow sensor.
Background
The airflow sensor is a sensor for detecting the flow rate of airflow, and a conventional airflow sensor structure such as a microphone controller disclosed in patent document CN217364701U includes: the shell and the capacitor plate, the gasket, the diaphragm, the cavity and the PCB component which are sequentially packaged in the shell are relatively complex in overall structure, more in parts and large in size, and a larger installation space is needed when the capacitor plate is applied.
Disclosure of utility model
In order to solve the technical problems, the utility model provides the airflow sensor which has the advantages of more compact structure, smaller volume, lower cost, more stable and excellent performance and can well detect complete airflow.
The technical scheme adopted for solving the technical problems is as follows: the airflow sensor comprises a shell, a circuit board, a first capacitance polar plate and a second capacitance polar plate;
The shell is wholly or partially a conductor, one end of the shell is provided with and electrically connected with the circuit board, the circuit board is provided with a plurality of through holes, and the inner surface of the circuit board is provided with and electrically connected with the first capacitor pole plate;
The other end of the shell is provided with and electrically connected with the second capacitor pole plate, the second capacitor pole plate is provided with an airflow channel, and the plate surface of the second capacitor pole plate is deformed by airflow pressure.
In this scheme second electric capacity polar plate is as atmospheric pressure perception position, and when the air current was through second electric capacity polar plate, when transient state or continuous pressure differential appear in second electric capacity polar plate, the second electric capacity polar plate appears deformation, and the electric capacity between second electric capacity polar plate and the first electric capacity polar plate appears changing, and then realizes detecting the purpose to the air current, can outwards realize voltage control through the circuit board, holistic structure is more retrencied, and the volume is littleer, and structural property is more stable.
Preferably, the first capacitor plate is a metal conductive layer disposed on a surface of the circuit board. The structure is simpler, and the volume is smaller.
Preferably, a first limit table and a second limit table are respectively arranged at two ends of the shell inwards, the circuit board is upwards attached to the first limit table, the second capacitor pole plate is downwards attached to the second limit table, an insulation pressing ring is sleeved in the shell, and two ends of the insulation pressing ring are respectively attached to the circuit board and the second capacitor pole plate. Through setting up first spacing platform and the spacing platform of second can carry out spacingly to the outside of circuit board and second electric capacity polar plate, combine the insulating clamping ring to keep apart and spacing relatively circuit board and second electric capacity polar plate, overall structure is simpler compact, and the volume is littleer, and is fixed more firm.
Preferably, the second capacitor plate is made of stainless steel, and comprises a peripheral fixing area and a middle detection area, and the fixing area is connected with the detection area through an elastic structure. The displacement deformation of the detection area relative to the fixed area can be realized through the elastic structure, so that the change of the capacitance can be realized when the airflow passes through.
Preferably, the fixing area, the detection area and the elastic structure are cut by a stainless steel sheet. The structure is more simplified, stable and firm.
Preferably, a limiting notch is arranged on the inner side of the lower end of the insulating compression ring, and the outer edge of the stainless steel sheet is clamped at the limiting notch. The second capacitor plate can be more stably limited.
Preferably, the insulation compression ring is made of plastic, silica gel, rubber or wood. The materials can play a role in limiting and insulating, and are low in cost and convenient to process.
Preferably, a dust screen is arranged on the outer side of the second capacitor plate. The external dust and impurities are prevented from entering, capacitance change is caused, and air flow detection accuracy is caused.
Preferably, the periphery of the dust screen is fixed on the outer side of the second limiting table. Can better fix and isolate dust impurity.
Preferably, the circuit board comprises a chip, an LED and a bonding pad which are arranged on a plate, the chip is positioned on the inner surface of the plate, and the first capacitor electrode plate is positioned on the surface of the chip. The structure is more simplified.
The utility model has the beneficial effects that:
By adopting the scheme, the sensor has the advantages of simpler overall structure, smaller volume, lower cost, more stable and excellent performance, and can be used for detecting complete airflow well, especially in the environment with more water vapor.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly described, and it is obvious that the drawings in the following description are only three of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an embodiment of the present utility model;
FIG. 2 is a perspective view of an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a second capacitive plate according to an embodiment of the present utility model;
Wherein, 1, LED; 2. a bonding pad; 3. a sheet material; 4. an insulating compression ring; 5. a chip; 6. a housing; 7. a second capacitor plate; 8. a dust screen; 9. a through hole; 10. a detection zone; 11. a fixed zone; 12. an elastic structure.
Detailed Description
The present utility model will be further described in detail with reference to the drawings and examples, which are only for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
Examples
As shown in fig. 1, the airflow sensor includes a housing 6, a circuit board, a first capacitive plate, and a second capacitive plate 7.
In this embodiment, the outer shell 6 is preferably a cylindrical cylinder, but in other embodiments, a polyhedral structure such as a cube may be used.
The shell 6 is a conductor, one end of the shell 6 is provided with and electrically connected with the circuit board, the circuit board is provided with a plurality of through holes 9, and the inner surface of the circuit board is provided with and electrically connected with the first capacitor plate. The housing 6 serves as part of the electrical communication between the first capacitive plate and the circuit board.
The other end of the shell 6 is provided with and electrically connected with the second capacitor plate 7, the second capacitor plate 7 is provided with an airflow channel, and the plate surface of the second capacitor plate 7 is deformed by airflow pressure.
In this embodiment this scheme uses as miaow head, first electric capacity polar plate and second electric capacity polar plate 7 set up relatively in the both ends of shell, and second electric capacity polar plate 7 is as atmospheric pressure perception position in this scheme, and when the air current was through second electric capacity polar plate 7, when transient state or continuous pressure differential appear in second electric capacity polar plate 7, deformation appear in second electric capacity polar plate 7, and the electric capacity between second electric capacity polar plate 7 and the first electric capacity polar plate appears changing, and then realizes detecting the purpose of air current, can outwards realize voltage control through the circuit board, holistic structure is retrencied more, and the volume is littleer, and structural property is more stable.
The first capacitor pole plate is a metal conductive layer arranged on the surface of the circuit board. The structure is simpler, and the volume is smaller.
The two ends of the shell 6 are inwards provided with a first limiting table and a second limiting table respectively, the circuit board is upwards attached to the first limiting table, the second capacitor pole plate 7 is downwards attached to the second limiting table, the insulating pressing ring 4 is sleeved in the shell 6, and the two ends of the insulating pressing ring 4 are respectively attached to the circuit board and the second capacitor pole plate 7. Through setting up first spacing platform and the spacing platform of second can carry out spacingly to the outside of circuit board and second electric capacity polar plate 7, combine insulating clamping ring 4 to the relative isolation of circuit board and second electric capacity polar plate 7 and spacing, overall structure is simpler compacter, and the volume is littleer, and is fixed more firm.
The second capacitor plate 7 is made of stainless steel, and the second capacitor plate 7 comprises a peripheral fixed area 11 and a middle detection area 10, and the fixed area 11 is connected with the detection area 10 through an elastic structure 12. The displacement deformation of the detection zone 10 relative to the fixed zone 11 can be achieved by the elastic structure 12, so as to achieve a change in capacitance as the air flow passes. The fixing area 11, the detecting area 10 and the elastic structure 12 are cut by a stainless steel sheet. The structure is more simplified, stable and firm. The elastic structure 12 is a bent metal wire, four of which are adopted in the embodiment, wherein the second capacitor plate 7 can be made of metal materials such as titanium alloy, copper alloy and the like besides stainless steel sheets.
The inner side of the lower end of the insulating compression ring 4 is provided with a limiting notch, and the outer edge of the stainless steel sheet is clamped at the limiting notch. The second capacitor plate 7 can be more stably limited.
The insulation compression ring 4 is made of plastic, silica gel, rubber or wood. The materials can play a role in limiting and insulating, and are low in cost and convenient to process.
The outer side of the second capacitor plate 7 is provided with a dust screen 8. The external dust and impurities are prevented from entering, capacitance change is caused, and air flow detection accuracy is caused.
The periphery of the dust screen 8 is fixed on the outer side of the second limiting table. Can better fix and isolate dust impurity.
The circuit board comprises a chip 5, an LED and a bonding pad 2 which are arranged on a plate 3, the chip 5 is positioned on the inner surface of the plate 3, and the first capacitor electrode plate is positioned on the surface of the chip 5. The structure is more simplified.
By adopting the scheme, the sensor has the advantages of simpler overall structure, smaller volume, lower cost, more stable and excellent performance, and can be used for detecting complete airflow well, especially in the environment with more water vapor.
Compared with the existing airflow sensor, the airflow sensor has the advantages that the structural parts are fewer, the material cost is low, the assembly is simpler, the performance is better, when condensate water is generated, the quality of water vapor condensed on the stainless steel surface is very little compared with that of the stainless steel, and the influence of blowing and sucking on the elastic sheet is very small.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above 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 utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. 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 utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The airflow sensor is characterized by comprising a shell (6), a circuit board, a first capacitance polar plate and a second capacitance polar plate (7);
The shell (6) is wholly or partially a conductor, one end of the shell (6) is provided with and electrically connected with the circuit board, the circuit board is provided with a plurality of through holes (9), and the inner surface of the circuit board is provided with and electrically connected with the first capacitor pole plate;
The other end of the shell (6) is provided with and electrically connected with the second capacitor pole plate (7), the second capacitor pole plate (7) is provided with an airflow channel, and the plate surface of the second capacitor pole plate (7) is deformed by airflow pressure.
2. An airflow sensor according to claim 1 wherein: the first capacitor pole plate is a metal conductive layer arranged on the surface of the circuit board.
3. An airflow sensor according to claim 1 wherein: the circuit board is upwards attached to the first limiting table, the second capacitor electrode plate (7) downwards attached to the second limiting table, an insulating pressing ring (4) is sleeved in the shell (6), and two ends of the insulating pressing ring (4) are respectively abutted to the circuit board and the second capacitor electrode plate (7).
4. A gas flow sensor according to claim 3, characterized in that: the second capacitor pole plate (7) adopts stainless steel sheets, the second capacitor pole plate (7) comprises a peripheral fixed area (11) and a middle detection area (10), and the fixed area (11) is connected with the detection area (10) through an elastic structure (12).
5. An airflow sensor according to claim 4 wherein: the fixing area (11), the detection area (10) and the elastic structure (12) are formed by cutting a stainless steel sheet.
6. An airflow sensor according to claim 5 wherein: the inner side of the lower end of the insulating compression ring (4) is provided with a limiting notch, and the outer edge of the stainless steel sheet is clamped at the limiting notch.
7. An airflow sensor according to claim 6 wherein: the insulation compression ring (4) is made of plastic, silica gel, rubber or wood.
8. A gas flow sensor according to claim 3, characterized in that: and a dustproof net (8) is arranged on the outer side of the second capacitor pole plate (7).
9. An airflow sensor according to claim 8 wherein: the periphery of the dustproof net (8) is fixed on the outer side of the second limiting table.
10. An airflow sensor according to claim 9 wherein: the circuit board comprises a chip (5), an LED and a bonding pad (2) which are arranged on a plate (3), the chip (5) is positioned on the inner surface of the plate (3), and the first capacitor electrode plate is positioned on the surface of the chip (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323101991.6U CN220982352U (en) | 2023-11-17 | 2023-11-17 | Airflow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323101991.6U CN220982352U (en) | 2023-11-17 | 2023-11-17 | Airflow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220982352U true CN220982352U (en) | 2024-05-17 |
Family
ID=91039313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323101991.6U Active CN220982352U (en) | 2023-11-17 | 2023-11-17 | Airflow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220982352U (en) |
-
2023
- 2023-11-17 CN CN202323101991.6U patent/CN220982352U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |