An in-vehicle dust sensor

Abstract

The utility model relates to a kind of in-car dust sensor, it is related to automobile sensor technical field, including upper cover, lower shell, PCB board, connector, fan, inner cover, light-emitting tube, light-receiving tube and lens, lower shell is equipped in the lower of upper cover, and upper cover is fixed with lower shell by bolt, lower shell both ends are equipped with exhaust port and air inlet respectively, PCB board is equipped in lower shell, connector and fan are equipped on PCB board, connector and fan are arranged in one end of lower shell exhaust port, inner cover is equipped in the air inlet one end in lower shell, inner cover lower is equipped with light-emitting tube and light-receiving tube, and lens is equipped with cooperation in the upper of light-emitting tube and light-receiving tube;The utility model is in by setting fan in lower shell, to quickly inhale external air in optical path area, improve detection efficiency;By setting light-emitting tube and light-receiving tube of cooperation in the optical path area of shell, by the signal change generated by light in optical path area refraction, to efficiently detect the dust content in inhaled air.

Description

Technical Field

[0001] This utility model relates to the field of automotive sensor technology, and in particular to an in-vehicle dust sensor. Background Technology

[0002] During car use, dust from the outside air enters the cabin, and interior furnishings also shed dust. This dust and particulate matter circulates throughout the vehicle via the air circulation system. Since the car is in a closed environment while driving, the dust deteriorates the air quality inside. This dust carries bacteria and other harmful substances that can irritate the respiratory system of drivers and passengers, causing coughs, asthma, and allergic reactions, leading to discomfort. Furthermore, large amounts of dust accumulate inside the car's air conditioning ducts, making them difficult to clean and causing bacterial growth within the system, which in turn affects the health of the occupants. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model discloses an in-vehicle dust sensor. This utility model achieves the purpose of efficiently detecting the dust content in the air inside the vehicle by setting a PCB board, connector, fan, inner cover, light-emitting tube, light-receiving tube and lens between the upper cover and the lower housing.

[0004] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0005] An in-vehicle dust sensor includes an upper cover, a lower housing, a PCB board, a connector, a fan, an inner cover, a light-emitting diode, a light-receiving diode, and a lens. The lower housing is located below the upper cover and is fixed to the upper cover by bolts. The lower housing has an exhaust port and an air inlet at its two ends, respectively. The PCB board is located inside the lower housing, and the connector and fan are located on the PCB board. The connector and fan are located at one end of the exhaust port of the lower housing. The inner cover is located at one end of the air inlet of the lower housing. The light-emitting diode and the light-receiving diode are located below the inner cover, and a lens is provided on both the light-emitting diode and the light-receiving diode to cooperate with them.

[0006] The connector is electrically connected to the PCB board, and one end of the connector passes through the end face of the lower housing and is electrically connected to the automotive wiring harness.

[0007] The fan is electrically connected to the PCB board. The fan is equipped with an air guide shroud. The fan rotates inside the air guide shroud. The air inlet end of the air guide shroud faces the air inlet, and the air outlet end of the air guide shroud is connected to the exhaust port.

[0008] The lower end of the inner cover is provided with two fixed compartments, which are respectively located on both sides of the air inlet end of the air guide hood. One fixed compartment contains a light-emitting tube and a lens, and the other fixed compartment contains a light-receiving tube and a lens.

[0009] Both the light-emitting tube and the light-receiving tube are electrically connected to the PCB board. The light emitted by the light-emitting tube passes through a lens set on the same side, and the emitted light passes through a lens on the other side and is then conducted to the light-receiving tube.

[0010] The air inlet has two connecting plates on its inner side, which are arranged in a figure-eight shape. One end of the connecting plate is connected to the inner wall of the lower housing, and the other end of the connecting plate is connected to the fixed compartment on the same side. There is a light path area between the two connecting plates. The inner walls of the lower housing and the connecting plates where the light path area is located are provided with a mirror reflection layer.

[0011] The in-vehicle dust sensor described in this utility model is highly practical and very convenient to use. This utility model improves detection efficiency by installing a fan in the lower housing to quickly draw in external air into the optical path area; and by setting a light-emitting tube and a light-receiving tube in the optical path area of ​​the housing, the signal change generated by the refraction of light in the optical path area is used to efficiently detect the dust content in the drawn-in air. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 3 This is an exploded view of the present invention;

[0015] Figure 4 This is a top view of the lower shell of this utility model;

[0016] Figure 5 This is a schematic diagram of the airflow direction of this utility model;

[0017] In the diagram: 1. Top cover; 2. Lower shell; 3. Connector; 4. Exhaust port; 5. Air inlet; 6. PCB board; 7. Inner cover; 8. Air guide cover; 9. Fan; 10. Light-emitting tube; 11. Light-receiving tube; 12. Lens; 13. Fixing chamber; 14. Connecting plate; 15. Optical path area. Detailed Implementation

[0018] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0019] Combined with appendix Figures 1-5An in-vehicle dust sensor includes an upper cover 1, a lower housing 2, a PCB board 6, a connector 3, a fan 9, an inner cover 7, a light-emitting diode 10, a light-receiving diode 11, and a lens 12. The lower housing 2 is located below the upper cover 1 and is fixed to the upper cover 1 by bolts. The lower housing 2 has an exhaust port 4 and an air inlet 5 at its two ends. The PCB board 6 is located inside the lower housing 2, and the connector 3 and the fan 9 are located on the PCB board 6. The connector 3 and the fan 9 are located at one end of the exhaust port 4 of the lower housing 2. The inner cover 7 is located at one end of the air inlet 5 inside the lower housing 2. The light-emitting diode 10 and the light-receiving diode 11 are located below the inner cover 7. The light-emitting diode 10 and the light-receiving diode 11 are each equipped with a lens 12. The fan 9 rotates to draw outside air into the lower housing 2 through the air inlet 5 and discharges the detected air through the exhaust port 4.

[0020] The connector 3 is electrically connected to the PCB board 6. One end of the connector 3 passes through the end face of the lower housing 2 and is electrically connected to the automotive wiring harness.

[0021] The fan 9 is electrically connected to the PCB board 6. The fan 9 is provided with an air guide shroud 8. The fan 9 rotates inside the air guide shroud 8. The air inlet end of the air guide shroud 8 faces the air inlet 5. The exhaust end of the air guide shroud 8 is connected to the exhaust port 4. The airflow generated by the fan 9 is discharged from the lower housing 2 through the air guide shroud 8, thereby improving the detection efficiency.

[0022] The lower end of the inner cover 7 is provided with two fixed chambers 13. The two fixed chambers 13 are respectively located on both sides of the air inlet end of the air guide hood 8. One fixed chamber 13 is provided with a light-emitting tube 10 and a lens 12, and the other fixed chamber 13 is provided with a light-receiving tube 11 and a lens 12. The two fixed chambers 13 maintain the angle of the light-emitting tube 10 and the light-receiving tube 11, reduce the influence of vibration generated by the rotation of the fan 9, and maintain the accuracy of detection.

[0023] Both the light-emitting tube 10 and the light-receiving tube 11 are electrically connected to the PCB board 6. The light emitted by the light-emitting tube 10 passes through the lens 12 set on the same side, and the emitted light passes through the lens 12 on the other side and is then conducted to the light-receiving tube 11.

[0024] Two connecting plates 14 are provided on the inner side of the air intake 5. The two connecting plates 14 are arranged in a V-shape. One end of the connecting plate 14 is connected to the inner wall of the lower housing 2, and the other end of the connecting plate 14 is connected to the fixed compartment 13 on the same side. The two connecting plates 14 guide the intake air. A light path area 15 is provided between the two connecting plates 14. A mirror reflection layer is provided on the inner wall of both the lower housing 2 and the connecting plate 14 where the light path area 15 is located. The light emitted by the light-emitting tube 10 passes through the lens 12 arranged on the same side and is refracted in the light path area 15 to the light-receiving tube 11. Dust will change the reflection of light, causing the light signal value received by the light-receiving tube 11 to change, thereby judging the concentration of dust in the vehicle.

[0025] The in-vehicle dust sensor described in this embodiment connects the vehicle wiring harness connector to the connector 3 during use. After the fan 9 is powered on, it rotates and draws outside air into the lower housing 2 through the air inlet 5. After the air enters the lower housing 2, the two connecting plates 14 guide the airflow. The light emitted by the light-emitting tube 10 passes through the lens 12 on the same side and is refracted in the optical path area 15. The refracted light passes through the lens 12 on the other side and is transmitted to the light-receiving tube 11. Dust will change the reflection of light, causing the light signal value received by the light-receiving tube 11 to change, thereby determining the concentration of dust in the vehicle. The airflow generated by the fan 9 is discharged from the lower housing 2 through the air guide shroud 8 to improve detection efficiency. The two fixed chambers 13 maintain the angle between the light-emitting tube 10 and the light-receiving tube 11, reducing the impact of vibration caused by the rotation of the fan 9 and maintaining the accuracy of detection.

[0026] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A vehicle interior dust sensor, comprising an upper cover (1), a lower housing (2), a PCB board (6), a connector (3), a fan (9), an inner cover (7), a light-emitting diode (10), a light-receiving diode (11), and a lens (12), wherein the lower housing (2) is provided below the upper cover (1), the upper cover (1) and the lower housing (2) are fixed by bolts, and the lower housing (2) is provided with an exhaust port (4) and an air inlet (5) at both ends, characterized in that: The lower housing (2) is provided with a PCB board (6), and the PCB board (6) is provided with a connector (3) and a fan (9). The connector (3) and the fan (9) are located at one end of the exhaust port (4) of the lower housing (2). The lower housing (2) is provided with an inner cover (7) at one end of the air inlet (5). Below the inner cover (7) are provided a light-emitting tube (10) and a light-receiving tube (11). Both the light-emitting tube (10) and the light-receiving tube (11) are provided with lenses (12) that cooperate with them.

2. The in-vehicle dust sensor according to claim 1, characterized in that: The connector (3) is electrically connected to the PCB board (6), and one end of the connector (3) passes through the end face of the lower housing (2) and is electrically connected to the automotive wiring harness.

3. The in-vehicle dust sensor according to claim 1, characterized in that: The fan (9) is electrically connected to the PCB board (6). The fan (9) is provided with a wind guide shroud (8). The fan (9) rotates inside the wind guide shroud (8). The air inlet end of the wind guide shroud (8) faces the air inlet (5). The exhaust end of the wind guide shroud (8) is connected to the exhaust port (4).

4. The in-vehicle dust sensor according to claim 1, characterized in that: The lower end of the inner cover (7) is provided with two fixed chambers (13). The two fixed chambers (13) are respectively located on both sides of the air inlet end of the air guide hood (8). One fixed chamber (13) is provided with a light-emitting tube (10) and a lens (12), and the other fixed chamber (13) is provided with a light-receiving tube (11) and a lens (12).

5. The in-vehicle dust sensor according to claim 4, characterized in that: The light-emitting tube (10) and the light-receiving tube (11) are both electrically connected to the PCB board (6). The light emitted by the light-emitting tube (10) passes through the lens (12) set on the same side, and the emitted light passes through the lens (12) on the other side and is then transmitted to the light-receiving tube (11).

6. The in-vehicle dust sensor according to claim 3, characterized in that: The air inlet (5) is provided with two connecting plates (14) on the inner side. The two connecting plates (14) are arranged in a figure-eight shape. One end of the connecting plate (14) is connected to the inner wall of the lower shell (2), and the other end of the connecting plate (14) is connected to the fixed chamber (13) on the same side. A light path area (15) is provided between the two connecting plates (14). A mirror reflection layer is provided on the inner wall of the lower shell (2) and the connecting plate (14) where the light path area (15) is located.

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