A verification device for anti-fog performance of automobile lamp design

Abstract

The present invention discloses a device for verifying the anti-fog performance of automobile lamp design, which is characterized by comprising a shell, a lampshade is provided on the shell, a flange is provided on the lampshade, a decorative ring corresponding to the shape of the flange is provided in the lampshade, a gap is formed between the decorative ring and the flange, a mounting hole is provided on one side of the gap, the mounting hole is connected to a wind speed meter, a vent is provided on one side of the shell, and a guide plate and an air inlet are provided on the bottom of the shell. The present invention can verify the gap between the decorative ring and the lampshade surface, the angle of the lampshade flange, and the influence of the size of the distance between the upper and lower ends of the decorative ring on the airflow velocity through testing during the lamp design stage, so as to obtain an ideal airflow velocity for dissipating fog, thereby effectively reducing the risk of fogging of the lamp assembly, improving the performance of the lamp, and playing a role in preventing and controlling the fogging problem of the lamp.

Description

Technical Field

[0001] The invention relates to a verification device for anti-fog performance used in vehicle lamp design, belonging to the technical field of vehicle lamps. Background Art

[0002] Automobile headlights are an important part of the field of automobile safety technology and are of great significance to driving safety.

[0003] In the daily use of cars, sometimes fog or condensation is found inside the car exterior lamps, especially on the inner surface of the light distribution mirror. If there is a lot of water, water will collect inside the lamp, which has a great impact on driving safety. At present, most car lights use light bulbs as light sources, and the lamp housing, lampshade surface and decorative ring are made of plastic, so they have the characteristics of low cost and light weight. However, when the car lights are working, high temperature areas and cold areas will be generated after the light source is lit. If the heat cannot be evenly dissipated, it will affect the service life and performance of surrounding parts. When the temperature difference of the lamp is large, fog will be generated on the inner surface of the lampshade, especially in the corners of the lamp where the airflow is not smooth, which is a high-incidence area of ​​fogging. The fogging of the lamp will not only affect the appearance of the lamp, but also bring huge hidden dangers to driving safety.

[0004] The fogging problem of headlights is a difficult problem in the current automotive industry. The current measures to solve the fogging of headlights mainly include adding anti-fog coating on the lampshade surface, adding desiccant inside the lamp, and adding air holes in the shell, but none of them can fundamentally eliminate the existence of fog. In the long run, there is a risk of water accumulation in the lamp, which seriously threatens the service life of the headlight bulb and the safety of the circuit inside the headlight. Starting from the structure of the lamp itself, the present invention simplifies the lamp model, adjusts the gap between the lampshade and the decorative ring, the angle of the curved edge under the lampshade surface, the inlet and outlet distance between the decorative ring and the lampshade surface edge, and other structural factors that affect the flow channel in the lamp, summarizes the influence of the flow channel structure on the airflow velocity in the lamp, so as to prevent and control the fogging problem of the lamp in the early stage of headlight design. Summary of the invention

[0005] In order to simulate the influence of fog on the airflow in the lamp, the present invention provides a verification device for the anti-fog performance of automobile lamp design, characterized in that: it includes a shell, a lampshade is provided on the shell, a flange facing the inner cavity of the shell is provided at the bottom of the lampshade, a decorative ring corresponding to the shape of the flange is provided in the lampshade, a gap is formed between the decorative ring and the flange, a mounting hole is provided at a position of the shell corresponding to the gap, the mounting hole is connected with a wind speed meter, an air vent is provided on one side of the shell, a guide plate is provided at the bottom of the shell, baffles are provided on both sides of the guide plate, the shell, the guide plate and the baffle form an air cavity, an air inlet is provided at the bottom of the air cavity, one end of the air cavity is connected with the gap, and the other end is connected with the air vent.

[0006] Preferably, the lampshade is tilted, and the angle between the inclined surface of the lampshade and the bottom of the shell is 60°.

[0007] Furthermore, the flange is an upper flange and a lower flange, the flange is L-shaped, the upper flange is connected to the lampshade, the lower flange is connected to the housing at an angle downward, and the angle between the upper flange and the lower flange is 90° to 180°. The flange angles are different, and by replacing flanges of different angles, the airflow conditions at different angles are simulated and analyzed.

[0008] Preferably, the height of the air cavity is 3-5 mm. The guide plate is higher than the air inlet hole, so as to facilitate the airflow to flow in the guide plate and guide the airflow to flow evenly into the gap between the decorative ring and the lampshade surface.

[0009] Furthermore, scale grooves are provided on both sides of the housing, which facilitate recording the distance moved by the decorative ring, so as to facilitate subsequent experiments.

[0010] Preferably, the decorative ring and the two end surfaces of the guide plate are bonded to the shell, which facilitates subsequent disassembly and assembly and meets experimental requirements under different conditions.

[0011] Beneficial effects: The verification device of the present invention has a simple structure, low manufacturing cost, and is easy to operate. Since the gap between the decorative ring and the lampshade surface, the angle of the lampshade flange, and the distance between the upper and lower inlet and outlet of the decorative ring can be tested and verified during the design stage of the lamp, the influence of the airflow velocity can be obtained, and the ideal airflow velocity for dissipating the fog can be obtained, thereby effectively reducing the risk of fogging of the lamp assembly, improving the performance of the lamp, and playing a role in preventing and controlling the fogging problem of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 It is a cross-sectional view of the present invention;

[0014] Figure 3 It is a top view of the internal structure of the present invention;

[0015] Figure 4 It is a schematic diagram of the internal structure of the present invention;

[0016] 1. Lampshade; 2. Shell; 3. Mounting hole; 4. Guide plate; 5. Air inlet; 6. Air vent; 7. Decorative ring; 8. Flanged edge; 81. Upper flange; 82. Lower flange; 9. Scale groove; 10. Inlet; 11. Outlet; 12. Baffle. DETAILED DESCRIPTION

[0017] like Figure 1As shown, a verification device for anti-fog performance of automobile lamp design is characterized in that: it includes a housing 2, a lampshade 1 is provided on the housing 2, the lampshade 1 is provided with a flange 8, a decorative ring 7 corresponding to the shape of the flange 8 is provided on the inner side of the lampshade 1, a mounting hole 3 is provided at the position corresponding to the gap of the housing 2, the mounting hole 3 is connected to the wind speed meter, a vent 6 is provided on one side of the housing 2, the vent 6 inputs a stable air source into the lamp, the housing 2 is provided with a vent 6, the vent 6 promotes air circulation in the cavity. A vent 6 is provided on one side of the housing 2, a guide plate 4 is provided at the bottom of the housing 2, baffles 12 are provided on both sides of the guide plate 4, the housing 2, the guide plate 4 and the baffle 12 form an air cavity, an air inlet 5 is provided at the bottom of the air cavity, one end of the air cavity is connected to the gap, and the other end is connected to the vent 6. The flange 8 is an upper flange 81 and a lower flange 82. The flange 8 is L-shaped. The upper flange 81 is connected to the lampshade 1, and the lower flange 82 is connected to the shell 2 at an angle downward. The angle between the upper flange 81 and the lower flange 82 is 90° to 180°. The flange 8 has different angles to simulate the airflow at different angles and make an analysis. The decorative ring 7 is set on the inner wall of the shell 2. The gap between the decorative ring 7 and the surface of the lampshade 1 is adjusted by carving grooves with different scales on the inner wall of the shell 2. The height of the air cavity is 3-5mm. As shown in the figure, the guide plate 4 guides the airflow to flow evenly into the gap between the decorative ring 7 and the surface of the lampshade 1. The air source is stably output from the air vent 6. The airflow flows out to the front and back of the lamp through the guide plate 4. The front end flows evenly into the gap between the decorative ring 7 and the surface of the lampshade 1, and flows out from the upper port of the decorative ring 7 through the gap. The mounting hole 3 of the shell 2 is equipped with an anemometer.

[0018] Specific working method: adjust the air source to make it stable at 1000mm / s, enter the interior of the shell 2 from the air vent 6 at the bottom of the shell 2, flow into the gap between the decorative ring 7 and the lampshade 1 through the guide plate 4, and flow out from the air vent 6 at the rear of the shell 2.

[0019] (1) Keep the gap between the decorative ring 7 and the lampshade 1 unchanged, keep the length of the two flanges 8 of the lampshade 1 unchanged, and keep the diameters of the decorative ring 7 and the inlet 10 and outlet 11 of the lampshade 1 unchanged. Change the angle of the two flanges 8 of the lampshade 1, measure the flow rate at the outlet 11 of the decorative ring 7 respectively, and record the data.

[0020] (2) Keep the angles of the two flanges 8 of the lampshade 1 unchanged, keep the lengths of the two flanges 8 of the lampshade 1 unchanged, keep the diameters of the decorative ring 7 and the inlet 10 and outlet 11 of the lampshade 1 unchanged, change the gap between the decorative ring 7 and the lampshade 1, measure the flow rate at the outlet 11 of the decorative ring 7 respectively, and record the data.

[0021] (3) Keep the gap between the decorative ring 7 and the lampshade 1 unchanged, keep the angles of the two flanges 8 of the lampshade 1 unchanged, keep the inlet 10 and outlet 11 of the decorative ring 7 and the lampshade 1 unchanged, keep the length of the upper flange 81 of the lampshade 1 unchanged, change the length of the lower flange 82 of the lampshade 1, measure the flow rate at the outlet 11 of the decorative ring 7 respectively, and record the data; then keep the length of the lower flange 82 of the lampshade 1 unchanged, change the length of the upper flange 81 of the lampshade 1, and measure the flow rate at the outlet 11 of the decorative ring 7 respectively, and record the data.

[0022] (4) Keep the gap between the decorative ring 7 and the lampshade 1 unchanged, the length of the two flanges 8 of the lampshade 1 unchanged, the angle of the two flanges 8 of the lampshade 1 unchanged, the diameter of the decorative ring 7 and the lampshade 1 outlet 11 unchanged, change the diameter of the decorative ring 7 and the lampshade 1 inlet 10, measure the flow rate at the decorative ring 7 outlet 11 respectively, and record the data; then keep the diameter of the decorative ring 7 and the lampshade 1 inlet 10 unchanged, change the diameter of the decorative ring 7 and the lampshade 1 outlet 11, measure the flow rate at the decorative ring 7 outlet 11 respectively, and record the data.

Claims

1. A device for verifying the anti-fog performance of automobile lamp design, characterized in that: The invention comprises a shell (2), wherein a lampshade (1) is provided on the shell (2), a flange (8) facing the inner cavity of the shell is provided at the bottom of the lampshade (1), a decorative ring (7) corresponding to the shape of the flange (8) is provided in the lampshade (1), a gap is formed between the decorative ring (7) and the flange (8), a mounting hole (3) is provided at a position of the shell (2) corresponding to the gap, the mounting hole (3) is connected to a wind speed meter, a ventilation hole (6) is provided on one side of the shell (2), a guide plate (4) is provided at the bottom of the shell (2), baffles (12) are provided on both sides of the guide plate (4), and the The shell (2) forms an air cavity with the guide plate (4) and the baffle (12); an air inlet hole (5) is provided at the bottom of the air cavity; one end of the air cavity is connected to the gap, and the other end is connected to the air vent (6); the flange (8) comprises an upper flange (81) and a lower flange (82); the flange (8) is L-shaped; the upper flange (81) is connected to the lampshade (1); the lower flange (82) is connected to the shell (2) at an angle downward; the angle between the upper flange (81) and the lower flange (82) is 90° to 180°; the height of the air cavity is 3-5 mm.

2. The device for verifying the anti-fog performance of a vehicle lamp design according to claim 1, characterized in that: The lampshade (1) is arranged obliquely on the housing (2), and the angle between the inclined surface of the lampshade (1) and the bottom of the housing (2) is 60°.

3. The device for verifying the anti-fog performance of a vehicle lamp design according to claim 1, characterized in that: The housing (2) is provided with scale grooves (9) on both sides.

4. The device for verifying the anti-fog performance of a vehicle lamp design according to claim 1, characterized in that: The decorative ring (7) and the two end surfaces of the guide plate (4) are bonded to the shell (2).

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