Nitrogen-oxygen sensor assembly with moisture-proof and dehumidification functions

Abstract

The utility model discloses a nitrogen-oxygen sensor assembly with moisture-proof and dehumidification functions, and belongs to the technical field of nitrogen-oxygen sensor assemblies. A nitrogen-oxygen sensor assembly with moisture-proof and dehumidification functions comprises a shell and further comprises a mounting bolt penetrating through the shell, a supporting plate is slidably connected into the shell, a sensor body is fixedly connected to the supporting plate, and the sensor body and the supporting plate are slidably connected to the mounting bolt; a first air hole is formed in one side of the shell, and a supporting spring is fixedly connected between the bottom of the supporting plate and the shell. A filtering clamping plate is arranged above the shell, and adsorption cotton is fixedly connected into the filtering clamping plate; according to the utility model, the sensor main body can work in a relatively dry and clean environment, the phenomenon that water drops are condensed on the surface of the sensor main body due to temperature difference day and night can be effectively avoided, the vibration of a vehicle can be buffered, and the service life of the sensor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen and oxygen sensor components, in particular to a nitrogen and oxygen sensor component with moisture-proof and dehumidification functions. Background Art

[0002] A nitrogen oxide sensor is a sensor used to detect the nitrogen oxide content in exhaust gas. It is widely used in automobile engine exhaust treatment detection and control systems to ensure that exhaust emissions during vehicle operation meet environmental protection requirements.

[0003] The nitrogen oxide sensor is a complex system, which mainly includes a nitrogen oxide probe, a wiring harness and a control unit. The control unit serves as the signal processing and output part and contains multiple electrical components. If the control component does not have good moisture-proof performance, it may be invaded by moisture, which may lead to circuit short circuit, component damage and other problems, thereby affecting the normal operation of the sensor. Based on this, the present utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a nitrogen oxide sensor assembly with moisture-proof and dehumidification functions that can overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A nitrogen oxide sensor assembly with moisture-proof and dehumidification functions includes a shell, and also includes: a mounting bolt passing through the shell, a support plate slidably connected to the shell, a sensor body fixedly connected to the support plate, and the sensor body and the support plate slidably connected to the mounting bolt; a first air hole is opened on one side of the shell, the first air hole is located near the bottom of the shell to connect the outside world with the space below the support plate, and a support spring is fixedly connected between the bottom of the support plate and the shell; a filter clamp is provided above the shell, and adsorption cotton is fixedly connected to the filter clamp, and the adsorption cotton is used to absorb moisture in the air entering the shell.

[0007] Preferably, a compressed air bag is fixedly connected between the support plate and the shell, the compressed air bag is connected to an air guide tube, and the air guide tube is provided with a plurality of second air holes.

[0008] Furthermore, a filter screen is fixedly connected to the filter clamping plate.

[0009] Furthermore, a limit block is fixedly connected to the shell, a scraper is reciprocatingly slidably connected to the limit block, the scraper is in contact with the filter screen, and the scraper is used to clean the filter screen in a reciprocating manner.

[0010] Furthermore, a first connecting rod is rotatably connected to the support plate, a second connecting rod is rotatably connected to the shell, the second connecting rod is connected to the first connecting rod by a rotating shaft, the first connecting rod and the second connecting rod are connected to a push rod by a rotating shaft, one end of the push rod is slidably connected to a third connecting rod, a sliding groove is provided on the shell, the third connecting rod is slidably connected in the sliding groove, the third connecting rod is slidably connected to the limit block, and the third connecting rod is connected to the scraper.

[0011] Preferably, one-way valves are connected on both sides of the support plate, and a one-way air outlet valve is provided in the first air hole.

[0012] Preferably, a plurality of counterweights are fixedly connected below the support plate.

[0013] Preferably, sealing rings are provided around the support plate.

[0014] Compared with the prior art, the present invention provides a nitrogen oxide sensor assembly with moisture-proof and dehumidification functions, which has the following beneficial effects:

[0015] 1. This nitrogen oxide sensor assembly with moisture-proof and dehumidification functions uses the vibration generated by the vehicle during driving to drive the support plate to move, thereby realizing the exchange of air inside the shell with the outside world. The air is filtered through the filter net and adsorption cotton to achieve moisture-proof, dehumidification and dust-proof effects.

[0016] 2. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions can buffer the vibration generated by the vehicle through the support spring and airbag, thereby preventing the sensor body from being damaged by frequent vibration.

[0017] The parts not involved in this device are the same as the existing technology or can be implemented using existing technology. The utility model can enable the sensor body to operate in a relatively dry and clean environment, can effectively avoid the phenomenon of water droplets condensing on the surface of the sensor body due to temperature differences between day and night, and can buffer the vibration of the vehicle, thereby increasing the service life of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a nitrogen oxide sensor assembly with moisture-proof and dehumidification functions proposed in this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of a nitrogen oxide sensor assembly with moisture-proof and dehumidification functions proposed in this utility model. Figure 2 ;

[0020] Figure 3 This is a cross-sectional view of a nitrogen oxide sensor assembly with moisture-proof and dehumidification functions proposed by the present invention;

[0021] Figure 4 This utility model proposes a nitrogen oxide sensor component with moisture-proof and dehumidification functions Figure 2 A schematic diagram of the structure of the enlarged part;

[0022] Figure 5 This utility model proposes a nitrogen oxide sensor component with moisture-proof and dehumidification functions Figure 3 Schematic diagram of the structure with enlarged part B.

[0023] In the figure: 1. Shell; 11. Mounting bolt; 12. Limit block; 13. Filter splint; 14. Adsorption cotton; 15. Filter screen; 16. Sliding groove; 17. First air hole; 3. Support plate; 31. One-way valve; 32. Sensor body; 34. Support spring; 35. Counterweight; 36. Sealing ring; 4. Compressed air bag; 41. Air guide tube; 42. Second air hole; 5. First connecting rod; 51. Second connecting rod; 52. Push rod; 53. Third connecting rod; 54. Scraper. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] Example 1: Reference Figure 1-Figure 5 A nitrogen oxide sensor assembly with moisture-proof and dehumidification functions includes a shell 1, and also includes: a mounting bolt 11 passing through the shell 1, a support plate 3 slidably connected inside the shell 1, a sensor body 32 fixedly connected to the support plate 3, and the sensor body 32 and the support plate 3 slidably connected to the mounting bolt 11; a first air hole 17 is opened on one side of the shell 1, and the first air hole 17 is located near the bottom of the shell 1 to connect the outside with the space below the support plate 3, and a support spring 34 is fixedly connected between the bottom of the support plate 3 and the shell 1; a filter clamping plate 13 is provided above the shell 1, and an adsorption cotton 14 is fixedly connected inside the filter clamping plate 13, and the adsorption cotton 14 is used to absorb moisture in the air entering the shell 1.

[0027] The utility model is suitable for mounting a platform for mounting the sensor body 32 upright or inverted. The position of the mounting bolt 11 is the same as the position of the mounting hole of the sensor body 32, so there is no need to open a new threaded hole on the mounting platform. The mounting bolt 11 can be directly installed on the original threaded hole, which makes the installation process simple and convenient.

[0028] The support plate 3 divides the shell 1 into two space parts. The space above the support plate 3 is the storage space, and the space below the support plate 3 is the ventilation space. When the car inevitably passes through some uneven roads during daily driving and generates vibrations, the support plate 3 slides on the mounting bolts 11. Under the action of the support spring 34, the support plate 3 will move back and forth up and down. During the reciprocating movement of the support plate 3, the storage space above the support plate 3 will change. The space change will cause the internal gas to be exchanged with the external gas, and the one-way valve 31 can only allow the gas in the storage space to be discharged outward. Therefore, if air wants to enter the storage space, it can only enter after passing through the adsorption cotton 14 to absorb the moisture in the air, thereby making the air in the storage space relatively dry, which can effectively avoid the phenomenon of water droplets condensing on the surface of the sensor body 32 due to the temperature difference between day and night, and achieve the effect of moisture-proof and dehumidification.

[0029] Example 2: Reference Figure 1-Figure 5 , which is basically the same as Example 1, but furthermore: a compressed air bag 4 is fixedly connected between the support plate 3 and the shell 1, the compressed air bag 4 is connected to an air guide tube 41, a plurality of second air holes 42 are opened on the air guide tube 41, a filter screen 15 is fixedly connected to the filter splint 13, a limit block 12 is fixedly connected to the shell 1, a scraper 54 is reciprocatingly connected in the limit block 12, the scraper 54 is attached to the filter screen 15, and the scraper 54 is used to clean the filter screen 15 by reciprocating, the support plate 3 is rotatably connected to the first connecting rod 5, the shell 1 is rotatably connected to the second connecting rod 51, and the second connecting rod 51 is connected to the first connecting rod 5 through a rotating shaft, the first connecting rod 5 and the second connecting rod 51 are connected to a push rod 52 through a rotating shaft, one end of the push rod 52 is slidably connected to the third connecting rod 53, a sliding groove 16 is provided on the shell 1, the third connecting rod 53 is slidably connected in the sliding groove 16, the third connecting rod 53 is slidably connected to the limit block 12, the third connecting rod 53 is connected to the scraper 54, and the two sides of the support plate 3 are connected with a one-way valve 31, and a one-way air outlet valve is provided in the first air hole 17. A plurality of counterweight blocks 35 are fixedly connected to the bottom of the support plate 3, and a sealing ring 36 is provided around the support plate 3.

[0030] In the present invention, an air inlet hole is opened on the compressed air bag 4 and a one-way air inlet valve is provided inside the compressed air bag 4. A one-way air outlet valve is provided in the air guide tube 41. When the support plate 3 is displaced due to vibration, the compressed air bag 4 is squeezed and exhausted outward through the air guide tube 41. The gas can blow the adsorption cotton 14 through the air guide tube 41, thereby keeping the adsorption cotton 14 dry and blowing away the dust on the filter screen 15. At the same time, the compressed air bag 4 and the support spring 34 can buffer the vibration generated, thereby increasing the service life of the sensor body 32.

[0031] When the support plate 3 moves, the first connecting rod 5 and the second connecting rod 51 are driven to rotate, thereby driving the push rod 52 to move horizontally. Since the push rod 52 will also move longitudinally during the horizontal movement, in order to avoid interference caused by the longitudinal movement, a sliding groove 16 and a sliding groove are respectively provided on the housing 1 and the third connecting rod 53, so that the push rod 52 will only drive the third connecting rod 53 to move horizontally during the movement. When the third connecting rod 53 moves horizontally, it will drive the scraper to scrape and clean the filter screen 15 back and forth, so that the cleaning effect is better.

[0032] The counterweight 35 can enhance the displacement effect of the support plate 3, so that the support plate 3 can be displaced when the vehicle generates a small vibration, thereby ensuring the operating frequency of the internal structure of the shell 1;

[0033] The sealing ring 36 can enhance the sealing effect of the support plate 3 and ensure that the air above the support plate 3 has more than one exchange outlet at the adsorption cotton 14 .

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A nitrogen oxide sensor assembly with moisture-proof and dehumidification functions, comprising a housing (1), characterized in that: Also includes: The housing (1) is penetrated by a mounting bolt (11), a support plate (3) is slidably connected in the housing (1), a sensor body (32) is fixedly connected to the support plate (3), and the sensor body (32) and the support plate (3) are slidably connected to the mounting bolt (11); A first air hole (17) is provided on one side of the shell (1), and the first air hole (17) is located near the bottom of the shell (1) for connecting the outside with the space below the support plate (3), and a support spring (34) is fixedly connected between the bottom of the support plate (3) and the shell (1); A filter clamp (13) is provided above the shell (1), and adsorption cotton (14) is fixedly connected to the filter clamp (13). The adsorption cotton (14) is used to absorb moisture in the air entering the shell (1).

2. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions according to claim 1, characterized in that: A compressed air bag (4) is fixedly connected between the support plate (3) and the housing (1); an air guide tube (41) is connected to the compressed air bag (4); and a plurality of second air holes (42) are provided on the air guide tube (41).

3. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions according to claim 2, characterized in that: A filter screen (15) is fixedly connected to the filter clamping plate (13).

4. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions according to claim 3, characterized in that: A limit block (12) is fixedly connected to the housing (1), a scraper (54) is reciprocatingly slidably connected to the limit block (12), the scraper (54) is in contact with the filter screen (15), and the scraper (54) is used to reciprocate and clean the filter screen (15).

5. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions according to claim 4, characterized in that: The support plate (3) is rotatably connected to a first connecting rod (5), the shell (1) is rotatably connected to a second connecting rod (51), the second connecting rod (51) and the first connecting rod (5) are connected via a rotating shaft, the first connecting rod (5) and the second connecting rod (51) are connected via a rotating shaft to a push rod (52), one end of the push rod (52) is slidably connected to a third connecting rod (53), a sliding groove (16) is provided on the shell (1), the third connecting rod (53) is slidably connected to the sliding groove (16), the third connecting rod (53) is slidably connected to the limit block (12), and the third connecting rod (53) is connected to the scraper (54).

6. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions according to claim 1, characterized in that: One-way valves (31) are connected on both sides of the support plate (3), and a one-way air outlet valve is provided in the first air hole (17).

7. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions according to claim 1, characterized in that: A plurality of counterweight blocks (35) are fixedly connected below the support plate (3).

8. The nitrogen oxide sensor assembly with moisture-proof and dehumidification functions according to claim 1, characterized in that: Sealing rings (36) are provided around the support plate (3).

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