CN110887017A

CN110887017A - Method for preventing fog of car lamp

Info

Publication number: CN110887017A
Application number: CN201811053428.7A
Authority: CN
Inventors: 李茹; 尹丽伟
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2018-09-11
Filing date: 2018-09-11
Publication date: 2020-03-17

Abstract

The invention relates to the technical field of automobile lamps, in particular to a technology for preventing fog of an automobile lamp. The invention provides a method for effectively reducing the fog risk of a vehicle lamp.

Description

Method for preventing fog of car lamp

Technical Field

The invention belongs to the technical field of automobile lamps, and particularly relates to a method for preventing fog of an automobile lamp.

Background

With the rapid development of the automobile industry, the automobile lamp plays a very important role in the driving process of people, and the requirement on the illumination performance of the automobile lamp in related regulations is higher and higher. The fog problem of the car lamp is often accompanied with the water accumulation problem of the car lamp, and the service life of a bulb of the car lamp and the safety of a circuit in the car lamp are seriously threatened.

With the diversification, characterization and streamlining of automobile models, the volume, the height-width ratio and the front-back depth proportion of the whole automobile lamp are larger and larger, the shape is irregular, and the nonuniformity of the temperature field in the automobile lamp is larger and larger. As the volume and mass increase, and various materials are used, the effect of moisture that is extracted or permeated from the materials entering the interior of the vehicular lamp is also expanding. Meanwhile, the application of low-heat-generation light sources such as Light Emitting Diodes (LEDs) and gas discharge lamps (HID) causes the problem that the internal temperature of the vehicle lamp cannot be raised in a short time even after the vehicle lamp is turned on. These adversely affect the removal of fog from the interior of the vehicle lamp. Therefore, good anti-fog measures are particularly important, and the conventional anti-fog coating and drying agent belong to disposable measures, and only the lamp can be replaced after the conventional anti-fog coating and drying agent are out of work, so that the cost is too high.

How to make the temperature field in the car lamp uniform so as to reduce the risk of fogging of the car lamp is one of the important technical problems in the car lamp industry, other technical schemes such as a car lamp dehumidifying and demisting device generally use a centrifugal fan and a gas conduit to make the temperature in the lamp uniform, and effectively prevent the generation of fog in the lamp; the disadvantage is that a centrifugal fan and a duct need to be installed, so that the structure of the car lamp is more complicated.

Disclosure of Invention

The technical problem to be solved by the invention is to make the temperature field in the car lamp uniform, thereby reducing the risk of fogging of the car lamp. The invention provides a method for preventing fog of a vehicle lamp, which is characterized by comprising the following steps: a method for preventing fog of a vehicle lamp, characterized in that: the car light comprises a lamp cover and the following components arranged in the lamp cover: the lamp shade is matched with the shell, the lamp holder and the decorative ring are arranged in the lamp shade, the light source is fixed on the lamp holder, the reflector is circumferentially arranged on the light source, and a component which is communicated with the part close to the light source and far away from the light source in the lamp shell is arranged as a heat conduction plastic part.

Preferably, the member is the decoration ring, the decoration ring is composed of a first decoration ring and a second decoration ring, one end of the first decoration ring is installed in the lamp shade and close to the light source, the other end of the first decoration ring is connected with the second decoration ring, and the other end of the second decoration ring extends to the position, far away from the light source, of the lamp shade and is connected with the lamp shade. The temperature of the light source in the car lamp is highest, the temperature is guided to the low-temperature area along with the decorative ring, the temperature of the low-temperature area rises at the moment, and the low-temperature area and the high-temperature area form circulation, so that the risk of fogging in the car lamp is reduced.

Further, the component is the casing, the lamp stand sets up on the casing, casing one end extends to the lamp shade and keeps away from light source one end, and with the lamp shade is connected. The temperature of the light source in the car lamp is conducted through the shell, the temperature of the high-temperature area is reduced, and the internal temperature is uniform.

Preferably, the component is the reflector and the decorative ring, the reflector is connected with the decorative ring, and one end of the decorative ring extends to a position where the lampshade is far away from the light source and is connected with the lampshade. The high temperature of the light source in the car light reaches the low temperature area in the car light along the reflector and the decorative ring, and the temperature of the low temperature area rises at the moment to form internal circulation with the high temperature area.

Has the advantages that: according to the invention, the heat conductivity of the internal components of the lamp is changed, so that the heat of the heat source of the lamp can be quickly and effectively transferred to the low-temperature area, the temperature field and the velocity field of the air flow in the lamp are distributed more uniformly, and the risk of fog generation is also reduced.

Drawings

FIG. 1 is a cross-section of an automotive tail light of the present invention;

FIG. 2 shows the temperature simulation results of a decorative ring I and a decorative ring II using a common plastic part;

FIG. 3 shows the temperature simulation results of the first and second decorative rings using a thermally conductive plastic;

in the figure: 1. a lamp shade; 2. a first decorative ring; 3. a second decorative ring; 4. a housing; 5. a mirror; 6. a lamp socket; 7. a light source; 8. a decorative ring.

Detailed Description

Example 1

As shown in fig. 1, a fog prevention method for a vehicular lamp, which is composed of a lamp cover and the following members provided in the lamp cover: the LED lamp comprises a shell 4, a lamp holder 6, a light source 7, a reflector 5 and a decorative ring 8, wherein the lamp shade 1 is matched with the shell 4, the lamp holder 6 and the decorative ring 8 are arranged in the lamp shade 1, the light source 7 is fixed on the lamp holder 6, the reflector 5 is arranged on the light source 7 in the circumferential direction, other components are not added, and the components communicated with the position close to the light source 7 and the position far away from the light source 7 in the lamp shell are made into heat-conducting plastic parts.

The component is the decoration ring 8, the decoration ring 8 comprises a decoration ring I2 and a decoration ring II 3, one end of the decoration ring I2 is installed in the lamp shade 1 and close to the light source 7, the other end of the decoration ring I is connected with the decoration ring II 3, and the other end of the decoration ring II 3 extends to the position, far away from the light source 7, of the lamp shade 1 and is connected with the lamp shade 1. The temperature of the light source 7 in the car lamp is highest, the temperature is guided to the low-temperature area along with the decorative ring 8, the temperature of the low-temperature area rises at the moment, and the low-temperature area and the high-temperature area form circulation, so that the risk of fogging in the car lamp is reduced.

As shown in fig. 2 and 3, in the present embodiment, the common plastic part of the two trim rings i 2 and ii 3 in the vehicle lamp, which are in direct contact with the heat source, is replaced with a heat-conducting plastic part, the heat conductivity is 10W/m · K, and then the change of the temperature distribution of the corresponding surface of the vehicle lamp housing 4 can be obtained through the fluid mechanics software simulation, the dark black area in fig. 2 and 3 indicates an area higher than the dew point temperature, fig. 2 is the simulation result of the common plastic, fig. 3 is the simulation result after replacing the trim rings i 2 and ii 3 of the heat-conducting plastic, as shown in fig. 3, the dark area is a high temperature area, and the bright area is a low temperature area, the distribution of the temperature in the vehicle from the high temperature area to the low temperature area can be seen, the temperature field and the velocity field distribution of the fluid in the vehicle lamp are changed, and the purpose of reducing the risk.

Example 2

The difference from example 1 is that: the component is casing 4, lamp stand 6 sets up on the casing 4, casing 4 one end extends to lamp shade 1 and keeps away from light source 7 one end, and with lamp shade 1 is connected. The temperature of the light source 7 in the car lamp is high, the flow rate is high, the high-temperature area conducts heat through the shell 4, heat reaches the low-temperature area, the temperature of the high-temperature area is reduced, the temperature of the low-temperature area is low, the flow rate is low, the temperature of the high-temperature area is conducted, the internal temperature is uniform, and internal circulation is formed.

Example 3

The differences from examples 1 and 2 are: the reflecting mirror 5 and the decorative ring 8 are used as the components, the reflecting mirror 5 is connected with the decorative ring 8, and one end of the decorative ring 8 extends to the position of the lampshade 1 far away from the light source 7 and is connected with the lampshade 1. The high temperature at the light source 7 in the car light reaches the low temperature zone in the car light along the reflector 5 and the decorative ring 8, and the temperature of the low temperature zone rises at the moment to form internal circulation with the high temperature zone.

Claims

1. A method for preventing fog of a vehicle lamp, characterized in that: the car light comprises a lamp shade (1) and the following components arranged in the lamp shade (1): casing (4), lamp stand (6), light source (7), speculum (5) and decorations circle (8), lamp shade (1) with casing (4) cooperation installation, be equipped with in lamp shade (1) lamp stand (6) with decorations circle (8), light source (7) fix on lamp stand (6), light source (7) circumference be equipped with speculum (5), establish the component that lamp body in-connection is close to light source (7) department and keeps away from light source (7) department into the heat conduction working of plastics.

2. The method for preventing fogging of vehicular lamp according to claim 1, wherein: the component is the decoration circle (8), the decoration circle (8) comprises decoration circle one (2) and decoration circle two (3), decoration circle one (2) one end is installed and is close to light source (7) department in lamp shade (1), the other end with decoration circle two (3) are connected, decoration circle two (3) the other end extends to lamp shade (1) and keeps away from light source (7) department to be connected with lamp shade (1).

3. The fog prevention method for vehicular lamp according to claim 1 or 2, characterized in that: the component is casing (4), lamp stand (6) set up on casing (4), casing (4) one end extends to lamp shade (1) and keeps away from light source (7) one end, and with lamp shade (1) are connected.

4. The method for preventing fogging of vehicular lamp according to claim 1, wherein: the reflecting mirror (5) and the decorative ring (8) are used as the components, the reflecting mirror (5) is connected with the decorative ring (8), and one end of the decorative ring (8) extends to the position, away from the light source (7), of the lampshade (1) and is connected with the lampshade (1).