Air flow sensor with inner wall closing

Abstract

The utility model discloses an inner wall close -mouthed formula air flow sensor belongs to air flow sensor technical field, has solved the dust and other sundries that present device cleaning brush cleaned will gather in the inside of connecting shell, and the dust that cleaned will adhere on filter plate again, and the problem of poor cleaning effect, including sensor body, the air inlet end fixedly connected with air inlet pipe of sensor body, the one side of air inlet pipe is away from sensor body is provided with the connecting pipe, the one end of connecting pipe is away from air inlet pipe and is provided with the mounting slot of cross section half circle, the inner wall fixed mounting of mounting slot has with its contour matched filter plate, the one end of connecting pipe is away from air inlet pipe and is provided with cleaning assembly. Through the setting of connecting pipe, filter plate and cleaning assembly, can carry out the cleaning to the dust and other sundries on the filter plate surface through the cleaning brush, and the dust and other sundries that are scraped down will be thrown to the outside of filter plate, and it is favorable to improve the cleaning effect to filter plate.

Description

Technical Field

[0001] This utility model relates to the field of air flow sensor technology, specifically an air flow sensor with an inner wall constriction. Background Technology

[0002] In modern automotive engine management systems and various industrial gas flow monitoring scenarios, air flow sensors are key components for accurately measuring intake air volume, and their performance directly affects system operating efficiency and control accuracy. Traditional air flow sensors often suffer from large measurement errors and slow response when facing complex airflow environments. The internally tapered air flow sensor has emerged to address this issue, achieving significant breakthroughs in improving measurement accuracy and adapting to extreme operating conditions thanks to its unique structural design and innovative working mechanism.

[0003] A search revealed that patent application number 202420756221.0 discloses an airflow sensor with optimized air inlet structure, including an air inlet duct. One side of the air inlet duct has a mounting groove, inside which a filter plate is movably mounted. A connecting assembly is provided on the periphery of the air inlet duct, and the inner wall of the connecting assembly has a cleaning structure. The connecting assembly includes a connecting shell, a slot, a second groove, a first spring, a pressing block, and a sliding groove. One side of the connecting shell has a slot that abuts against the filter plate, and the slot engages with the air inlet duct. The inner wall of the connecting shell has a second groove, inside which a first spring is fixedly mounted. One end of the first spring is fixedly mounted with a pressing block, which abuts against the outer surface of the air inlet duct. The other side of the connecting shell has a sliding groove.

[0004] Although the optimized airflow sensor in the air inlet structure achieves convenient and quick installation and easy cleaning of the filter plate through the design of the connecting components and cleaning structure, the dust and other debris cleaned by the cleaning brush of the optimized airflow sensor in the air inlet structure will accumulate inside the connecting shell when cleaning the filter plate. The debris accumulated inside the connecting shell is easily carried back by the airflow and re-adhere to the surface of the filter plate, which will lead to incomplete cleaning of the filter plate. Repeated cleaning will actually increase the risk of filter clogging.

[0005] Therefore, we propose an internally tapered airflow sensor. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an air flow sensor with an inner wall constriction, which solves the problem that dust and other debris cleaned by the brush in existing devices tend to accumulate inside the connecting shell, and the cleaned dust will re-adhere to the filter plate, resulting in poor cleaning performance.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: an inner wall constriction type air flow sensor, including a sensor body, wherein an air inlet duct is fixedly connected to the air inlet end of the sensor body;

[0008] A connecting pipe is provided on the side of the air inlet duct away from the sensor body. A semi-circular mounting groove is opened at the end of the connecting pipe away from the air inlet duct. A filter plate matching its contour is fixedly installed on the inner wall of the mounting groove. A cleaning component is provided at the end of the connecting pipe away from the air inlet duct.

[0009] The cleaning assembly includes a support plate, a rotating rod, an arc-shaped plate, and a cleaning brush. The support plate is fixedly installed on both the front and rear side walls of the connecting pipe. The rotating rod is rotatably installed on the end of the support plate away from the connecting pipe via a bearing ring. An arc-shaped plate arranged in a circular array is fixedly installed on the middle of the outer surface of the rotating rod. The cleaning brush is fixedly installed on the end of the arc-shaped plate away from the cleaning brush.

[0010] Preferably, both the arc-shaped plate and the cleaning brush are made of nylon. The rotating rod is coaxially arranged with the filter plate, and the cleaning brush is in contact with the surface of the filter plate. Nylon material has high strength and light weight, which facilitates the rotation of the arc-shaped plate under the push of wind and can increase the service life of the cleaning brush.

[0011] Preferably, the air inlet duct is funnel-shaped, and the diameter of the inner wall of the air inlet duct decreases linearly from the end away from the sensor body to the end closer to the sensor body, in order to increase the flow rate of the airflow through the air inlet duct and improve the uniformity of the airflow.

[0012] Preferably, a first flange is fixedly installed at the end of the air inlet duct away from the sensor body, and a second flange is fixedly installed at the end of the connecting pipe close to the sensor body. The first flange and the second flange are connected by bolts and nuts, which facilitates the connection of the air inlet duct and the connecting pipe together.

[0013] Preferably, a connector is provided on the peripheral side of the sensor body. The connector is connected to the internal circuit of the sensor body through its internal pins, transmitting the real-time air intake signal collected by the sensor body to the vehicle ECU. At the same time, the connector provides power to the sensor body to ensure the normal operation of the internal components of the sensor body.

[0014] This invention provides an air flow sensor with an inner wall tapering design. It offers the following advantages:

[0015] This internally tapered airflow sensor, through the arrangement of connecting pipes, filter plates, and cleaning components, can filter external airflow using the filter plate. The airflow can drive the arc-shaped plate to rotate, which in turn drives the cleaning brush to rotate around the pivot. The cleaning brush can then clean dust and other debris from the surface of the filter plate. Under the action of centrifugal force, when the cleaning brush is not in contact with the filter plate, the scraped dust and other debris are thrown to the outside of the filter plate, preventing the cleaned dust and other debris from re-adhering to the filter plate. This improves the cleaning effect on the filter plate and solves the problem of existing devices where the dust and other debris cleaned by the brush accumulates inside the connecting shell and re-adheres to the filter plate, resulting in poor cleaning effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the sensor body and air inlet duct structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cleaning component structure of this utility model.

[0020] In the diagram: 1. Sensor body; 2. Air inlet duct; 3. Connector; 4. First flange; 5. Second flange; 6. Connecting pipe; 61. Mounting groove; 7. Filter plate; 8. Cleaning assembly; 81. Support plate; 82. Rotating rod; 83. Arc plate; 84. Cleaning brush. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: As Figure 1-4 As shown: It includes a sensor body 1, and an air inlet duct 2 is fixedly connected to the air inlet end of the sensor body 1;

[0023] A connecting pipe 6 is provided on the side of the air inlet duct 2 away from the sensor body 1. A semi-circular mounting groove 61 is opened at the end of the connecting pipe 6 away from the air inlet duct 2. A filter plate 7 matching its contour is fixedly installed on the inner wall of the mounting groove 61. A cleaning component 8 is provided at the end of the connecting pipe 6 away from the air inlet duct 2.

[0024] The cleaning assembly 8 includes a support plate 81, a rotating rod 82, an arc plate 83, and a cleaning brush 84. The support plate 81 is fixedly installed on both the front and rear side walls of the connecting pipe 6. The rotating rod 82 is rotatably installed on the end of the support plate 81 away from the connecting pipe 6 through a bearing ring. The arc plate 83, which is arranged in a ring array, is fixedly installed on the middle of the outer surface of the rotating rod 82. The cleaning brush 84 is fixedly installed on the end of the arc plate 83 away from the cleaning brush 84.

[0025] The system, with its connecting pipe 6, filter plate 7, and cleaning assembly 8, allows the filter plate 7 to filter external airflow. This airflow drives the arc plate 83 to rotate, which in turn causes the cleaning brush 84 to rotate around the pivot rod 82. The cleaning brush 84 then cleans dust and other debris from the surface of the filter plate 7. Under centrifugal force, when the cleaning brush 84 is not in contact with the filter plate 7, the scraped dust and other debris are thrown to the outside of the filter plate 7, preventing them from re-adhering to the filter plate 7. This improves the cleaning effect on the filter plate 7 and solves the problem in existing devices where dust and other debris collected by the cleaning brush accumulate inside the connecting shell and re-adhere to the filter plate, resulting in poor cleaning performance.

[0026] Furthermore, both the curved plate 83 and the cleaning brush 84 are made of nylon. The rotating rod 82 is coaxially arranged with the filter plate 7, and the cleaning brush 84 is in contact with the surface of the filter plate 7. The nylon material is strong and lightweight, which makes it easy for the curved plate 83 to rotate under the push of wind, and can increase the service life of the cleaning brush 84.

[0027] Furthermore, the air inlet duct 2 is funnel-shaped, and the diameter of the inner wall of the air inlet duct 2 decreases linearly from the end away from the sensor body 1 to the end closer to the sensor body 1, in order to increase the flow rate of the airflow through the air inlet duct 2 and improve the uniformity of the airflow.

[0028] Furthermore, a first flange 4 is fixedly installed at the end of the air inlet duct 2 away from the sensor body 1, and a second flange 5 is fixedly installed at the end of the connecting pipe 6 close to the sensor body 1. The first flange 4 and the second flange 5 are connected by bolts and nuts. The first flange 4 and the second flange 5 facilitate the connection of the air inlet duct 2 and the connecting pipe 6 together.

[0029] Furthermore, a connector 3 is provided on the peripheral side of the sensor body 1. The connector 3 is connected to the internal circuit of the sensor body 1 through its internal pins, and transmits the real-time air intake signal collected by the sensor body 1 to the vehicle ECU. At the same time, the connector 3 provides working power to the sensor body 1 to ensure the normal operation of the internal components of the sensor body 1.

[0030] The working principle and usage process of this utility model: This inner wall constriction type air flow sensor is designed so that the diameter of the inner wall of the air inlet duct 2 decreases linearly from the end furthest from the sensor body 1 to the end closest to the sensor body 1, so as to increase the airflow velocity through the air inlet duct 2 and improve the uniformity of airflow. During the car's operation, the external airflow is filtered by the filter plate 7 and then passes through the connecting pipe 6 and the air inlet duct 2 in sequence, and finally passes through the sensor body 1 to measure the gas flow. During this process, the airflow drives the arc plate 83 to rotate, which in turn drives the cleaning brush 84 to rotate around the rotating rod 82. The cleaning brush 84 can clean the dust and other debris on the surface of the filter plate 7. Under the action of centrifugal force, when the cleaning brush 84 is not in contact with the filter plate 7, the dust and other debris that are scraped off will be thrown to the outside of the filter plate 7.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An air flow sensor with an inner wall narrowing, comprising a sensor body (1), wherein an air inlet duct (2) is fixedly connected to the air inlet end of the sensor body (1). Its features are: A connecting pipe (6) is provided on the side of the air inlet duct (2) away from the sensor body (1). A mounting groove (61) with a semi-circular cross section is opened at the end of the connecting pipe (6) away from the air inlet duct (2). A filter plate (7) matching its outline is fixedly installed on the inner wall of the mounting groove (61). A cleaning component (8) is provided at the end of the connecting pipe (6) away from the air inlet duct (2). The cleaning assembly (8) includes a support plate (81), a rotating rod (82), an arc plate (83), and a cleaning brush (84). The support plate (81) is fixedly installed on the front and rear side walls of the connecting pipe (6). The rotating rod (82) is rotatably installed on the end of the support plate (81) away from the connecting pipe (6) through a bearing ring. The arc plate (83) is fixedly installed in a ring array on the middle of the outer surface of the rotating rod (82). The cleaning brush (84) is fixedly installed on the end of the arc plate (83) away from the cleaning brush (84).

2. The air flow sensor with an inner wall tapering design according to claim 1, characterized in that: The arc plate (83) and the cleaning brush (84) are both made of nylon. The rotating rod (82) is coaxially arranged with the filter plate (7). The cleaning brush (84) is in contact with the surface of the filter plate (7).

3. The air flow sensor with an inner wall tapering design according to claim 1, characterized in that: The air inlet duct (2) is bucket-shaped, and the diameter of the inner wall of the air inlet duct (2) decreases linearly from the end away from the sensor body (1) to the end close to the sensor body (1).

4. The air flow sensor with an inner wall tapering design according to claim 1, characterized in that: The air inlet duct (2) is fixedly installed with a first flange (4) at the end away from the sensor body (1), and the connecting pipe (6) is fixedly installed with a second flange (5) at the end close to the sensor body (1). The first flange (4) and the second flange (5) are connected by bolts and nuts.

5. The air flow sensor with an inner wall tapering design according to claim 1, characterized in that: A connector (3) is provided on the peripheral side of the sensor body (1).

Images