Nitrogen-oxygen sensor with gas inlet structure

Abstract

The utility model discloses a nitrogen-oxygen sensor with an air inlet structure, which belongs to the technical field of nitrogen-oxygen sensors and comprises a nitrogen-oxygen sensor body and further comprises a mounting seat arranged at one end of the nitrogen-oxygen sensor body, a filter screen group is fixedly mounted on the upper surface of the mounting seat, a connecting piece is fixedly connected to the lower surface of the mounting seat, and an air inlet is formed in the lower surface of the connecting piece. The outer wall of the connecting piece is fixedly connected with a clamping piece; after the clamping piece is aligned with the access hole through the mounting seat, the connecting piece is pressed into the mounting groove, so that the connecting piece abuts against the fixing ring, the mounting seat is further pressed to compress the reset spring, then the connecting piece is rotated to enable the clamping piece to slide into the limiting groove, the mounting seat is loosened, and the clamping piece is clamped in the limiting groove. And the fixing ring is reset under the elastic force of the reset spring to completely clamp the clamping piece into the limiting groove, so that the filter screen group on the surface of the mounting seat is fixed, and the filter screen group can be quickly and conveniently mounted and dismounted.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen and oxygen sensor technology, and in particular to a nitrogen and oxygen sensor with an air intake structure. Background Technology

[0002] Incomplete combustion in gasoline engines produces carbon soot particles. When the fuel-air mixture ratio is inaccurate, the spark plugs ignite poorly, or the fuel injectors malfunction, the fuel cannot burn completely, also forming tiny carbon particles. These carbon particles are expelled with the exhaust gas and enter the intake port of the nitrogen oxide sensor, causing blockage of the filter at the sensor's intake. This affects the speed and amount of exhaust gas entering the sensor. When the filter is damaged, deformed, or severely blocked and cannot be cleaned and restored, it needs to be replaced promptly to prevent the gas sample entering the sensor from not accurately reflecting the actual composition of the exhaust gas due to poor air intake, thus distorting the detection signal.

[0003] However, the filters at the air inlet of existing nitrogen and oxygen sensors are generally installed using a welding machine, which is inconvenient for cleaning and cannot be easily replaced when the filters are damaged. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing technologies cannot easily replace damaged filters, and to propose a nitrogen-oxygen sensor with an air intake structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A nitrogen-oxygen sensor with an air intake structure includes a nitrogen-oxygen sensor body and further includes: a mounting base disposed at one end of the nitrogen-oxygen sensor body, a filter screen assembly fixedly mounted on the upper surface of the mounting base, a connector fixedly connected to the lower surface of the mounting base, and a snap-fit ​​component fixedly connected to the outer wall of the connector; a mounting groove formed on the nitrogen-oxygen sensor body, the inner wall of the mounting groove having an access hole and a limiting groove adapted to the snap-fit ​​component; and a fixing assembly disposed inside the mounting groove for fixing the mounting base.

[0007] Preferably, the fixing component includes a return spring fixedly connected to the inner wall of the mounting groove, and a fixing ring fixedly connected to the other end of the return spring, the fixing ring being slidably connected to the mounting groove.

[0008] Preferably, the filter assembly includes multiple coaxial filter screens with equal spacing, and the outermost filter screen of the filter assembly is threadedly connected to a cover.

[0009] Preferably, the filter mesh of the filter group has gradually larger filter holes from the inside to the outside.

[0010] Preferably, cleaning rings are slidably connected within the gaps formed between the multiple sets of filter screens, and between the inner and outer walls of the filter screen sets.

[0011] Preferably, the multiple sets of cleaning rings are slidably connected to multiple sets of cleaning brushes, which are evenly distributed in a circumferential array on the outer wall of the cleaning rings.

[0012] Preferably, all of the multiple sets of cleaning brushes are fixedly connected to the cover, and all of the multiple sets of cleaning brushes are slidably connected to the outer wall of the multiple sets of filter screens.

[0013] Compared with the prior art, the present invention provides a nitrogen-oxygen sensor with an air intake structure, which has the following advantages:

[0014] 1. This nitrogen-oxygen sensor with an air intake structure aligns the snap-fit ​​component with the access hole via the mounting base. The connector is then pressed into the mounting groove, causing it to abut against the retaining ring. Further pressing of the mounting base compresses the return spring. Rotating the connector allows the snap-fit ​​component to slide into the limiting groove. Releasing the mounting base allows the retaining ring to reset under the force of the return spring, fully engaging the snap-fit ​​component into the limiting groove, thus securing the filter assembly on the mounting base surface. For disassembly, pressing the mounting base compresses the return spring, causing the snap-fit ​​component to slide out of the limiting groove. Rotating the connector then allows the snap-fit ​​component to slide out of the access hole, releasing the mounting base and enabling quick and convenient installation and disassembly of the filter assembly.

[0015] 2. This nitrogen-oxygen sensor with an air intake structure disconnects the cover from the filter assembly by rotating the cover. Simultaneously, as the cover rotates, it drives the cleaning brush to rotate, allowing the cleaning brush to clean the multiple filter screens within the filter assembly. When the connection between the cover and the filter assembly is disconnected, pulling the cover outwards allows the cleaning ring to further clean the multiple filter screens within the filter assembly, removing internal dust. This allows for convenient cleaning of the filter assembly even when it is undamaged. Attached Figure Description

[0016] Figure 1 This is a three-dimensional front view structural schematic diagram of a nitrogen-oxygen sensor with an air intake structure proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the connecting part in a nitrogen-oxygen sensor with an air intake structure proposed in this utility model.

[0018] Figure 3 This utility model proposes a nitrogen-oxygen sensor with an air intake structure. Figure 2 Enlarged view of region A in the middle;

[0019] Figure 4This is a schematic diagram of the cross-sectional view of the cover of a nitrogen-oxygen sensor with an air intake structure proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of the cleaning ring portion in a nitrogen-oxygen sensor with an air intake structure proposed in this utility model.

[0021] In the diagram: 1. Nitrogen-oxygen sensor body; 2. Mounting base; 3. Filter array; 4. Connector; 41. Snap-fit ​​component; 5. Mounting groove; 51. Access hole; 52. Limiting groove; 6. Fixing component; 61. Return spring; 62. Fixing ring; 7. Cover; 8. Cleaning brush; 9. Cleaning ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example 1: Refer to Figures 1-5 A nitrogen-oxygen sensor with an air intake structure includes a nitrogen-oxygen sensor body 1, and further includes: a mounting base 2, disposed at one end of the nitrogen-oxygen sensor body 1, a filter array 3 fixedly mounted on the upper surface of the mounting base 2, a connector 4 fixedly connected to the lower surface of the mounting base 2, and a snap-fit ​​41 fixedly connected to the outer wall of the connector 4; a mounting groove 5, formed on the nitrogen-oxygen sensor body 1, with an access hole 51 and a limiting groove 52 adapted to the snap-fit ​​41 on the inner wall of the mounting groove 5; and a fixing component 6, disposed inside the mounting groove 5 for fixing the mounting base 2, the fixing component 6 including a return spring 61 fixedly connected to the inner wall of the mounting groove 5, and a fixing ring 62 fixedly connected to the other end of the return spring 61, the fixing ring 62 being slidably connected to the mounting groove 5.

[0025] When using the above technical solution, after aligning the snap-fit ​​41 with the access hole 51 using the mounting base 2, the connector 4 is pressed into the mounting groove 5, causing the connector 4 to abut against the fixing ring 62. Further pressing the mounting base 2 compresses the return spring 61. Then, the connector 4 is rotated, causing the snap-fit ​​41 to slide into the limiting groove 52. The mounting base 2 is then released, and the fixing ring 62 resets under the elastic force of the return spring 61, completely snapping the snap-fit ​​41 into the limiting groove 52, thereby fixing the filter assembly 3 on the surface of the mounting base 2. When disassembly is required, the mounting base 2 is pressed, causing the return spring 61 to compress, and the snap-fit ​​41 slides out of the limiting groove 52. Then, the connector 4 is rotated, causing the snap-fit ​​41 to slide out from the access hole 51, releasing the fixing of the mounting base 2. This allows for quick and convenient installation and disassembly of the filter assembly 3.

[0026] Example 2: Further, referring to Figures 1-5 The filter assembly 3 includes multiple coaxial filter screens with equal spacing. The outermost filter screen of the filter assembly 3 is threadedly connected to a cover 7. The filter screens of the filter assembly 3 have gradually larger filter holes from the inside to the outside. Cleaning rings 9 are slidably connected within the spacing between the multiple filter screens and on both the inner and outer walls of the filter assembly 3. Multiple cleaning brushes 8 are slidably connected to the multiple cleaning rings 9. The multiple cleaning brushes 8 are evenly distributed in a circumferential array on the outer wall of the cleaning rings 9. The multiple cleaning brushes 8 are all fixedly connected to the cover 7 and slidably connected to the outer wall of the multiple filter screens.

[0027] When using the above technical solution, the connection between the cover 7 and the filter group 3 is released by rotating the cover 7. At the same time, when the cover 7 rotates, the cleaning brush 8 rotates, which can clean the multiple filter groups in the filter group 3. When the connection between the cover 7 and the filter group 3 is released, the cleaning ring 9 is pulled outward to further clean the multiple filter groups in the filter group 3 and remove the dust inside. This allows the filter group 3 to be easily cleaned when it is not damaged.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A nitrogen-oxygen sensor with an air intake structure, comprising a nitrogen-oxygen sensor body (1), characterized in that, Also includes: Mounting base (2) is located at one end of the nitrogen and oxygen sensor body (1). A filter screen group (3) is fixedly installed on the upper surface of the mounting base (2). A connector (4) is fixedly connected to the lower surface of the mounting base (2). A snap-fit ​​member (41) is fixedly connected to the outer wall of the connector (4). The mounting groove (5) is provided on the nitrogen and oxygen sensor body (1). The inner wall of the mounting groove (5) is provided with an access hole (51) and a limiting groove (52) that is adapted to the snap-fit ​​(41). A fixing component (6) is disposed inside the mounting slot (5) to fix the mounting base (2).

2. A nitrogen-oxygen sensor with an air intake structure according to claim 1, characterized in that, The fixing component (6) includes a return spring (61) fixedly connected to the inner wall of the mounting groove (5), and a fixing ring (62) fixedly connected to the other end of the return spring (61), and the fixing ring (62) is slidably connected to the mounting groove (5).

3. A nitrogen-oxygen sensor with an air intake structure according to claim 1, characterized in that, The filter group (3) includes multiple coaxial filter groups with equal spacing, and the outermost filter group (3) has a cover (7) threadedly connected to its outer wall.

4. A nitrogen-oxygen sensor with an air intake structure according to claim 3, characterized in that, The filter mesh of the filter group (3) gradually increases in size from the inside to the outside.

5. A nitrogen-oxygen sensor with an air intake structure according to claim 3, characterized in that, Cleaning rings (9) are slidably connected to the gaps formed between the multiple sets of filter screens, as well as to the inner and outer walls of the filter screen group (3).

6. A nitrogen-oxygen sensor with an air intake structure according to claim 5, characterized in that, Multiple sets of cleaning rings (9) are connected to multiple sets of cleaning brushes (8) in a circular array on the outer wall of the cleaning rings (9).

7. A nitrogen-oxygen sensor with an air intake structure according to claim 6, characterized in that, The multiple sets of cleaning brushes (8) are fixedly connected to the cover (7), and the multiple sets of cleaning brushes (8) are slidably connected to the outer wall of the multiple sets of filter screens.

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