CN207648693U - A kind of automotive LED headlamp - Google Patents

Abstract

The utility model discloses an LED automobile headlight, which is used for solving the problems of light distribution and heat dissipation of the LED automobile headlight. The LED automotive headlight includes a housing, an LED module; a reflective bowl for reflecting the light emitted by the LED module, the reflective bowl is connected with the housing fastener and forms a cooling type for storing cooling liquid Cavity; substrate, the LED module is mounted on the substrate, the substrate is provided with a hollow cavity, the hollow cavity communicates with the cooling cavity; and a heat sink, the heat sink is arranged on the housing , for dissipating heat from the housing. The LED automobile headlight has good light distribution and good heat dissipation effect.

Description

A kind of LED car headlight

technical field

The utility model relates to the field of automobile lamps, in particular to an LED automobile headlamp.

Background technique

Automobile lighting needs to meet certain conditions. Automobile lights are various traffic lights installed on automobiles to ensure safe driving. Automobile headlights are divided into two types: lighting lamps and signal lamps.

Car headlights are a kind of car lights, also known as car headlights. As the eyes of a car, it is not only related to the external image of a car owner, but also closely related to driving at night or driving safely under bad weather conditions. The main purpose of car headlights is to illuminate the road and objects in front of the car to ensure driving safety. It is also possible to use high beam and low beam alternately as a signal for overtaking at night. The headlights are installed on both sides of the head of the car, and each car is equipped with 2 or 4. The bulb power is 45-60W for high beam and 25-55W for low beam. The aforementioned automobile headlights in the prior art do not have the light distribution required for automobile road lighting, and there are also problems in heat dissipation, while the technology of quasi-LED automobile lighting lamps is immature.

Utility model content

In view of this, in order to solve the problem of light distribution and heat dissipation of automobile headlights in the prior art, the utility model provides an LED automobile headlight. The LED module used for the light distribution of the LED automobile headlight is mounted on the substrate and the illuminating light is formed through the reflective bowl. A cooling cavity containing cooling liquid is formed between the reflective bowl and the housing. The cooling liquid can dissipate heat to the LED module. The substrate is provided with a hollow cavity, and the hollow cavity and the cooling cavity connected, the hollow cavity is used to dissipate heat from the substrate, thereby indirectly dissipating heat to the LED module.

Below is the content of the utility model:

The utility model provides an LED automobile headlamp, comprising:

case;

LED module;

A reflective bowl, used to reflect the light emitted by the LED module, the reflective bowl is connected to the housing fastener and encloses a cooling cavity for storing cooling liquid;

A substrate, the LED module is mounted on the substrate, the substrate is provided with a hollow cavity, and the hollow cavity communicates with the cooling cavity; and

A cooling fin, the cooling fin is arranged on the casing, and is used for dissipating heat to the casing.

The LED automobile headlight adopts LED module as the light source, which can meet the light intensity required for lighting, and can also play a role in energy saving. There is a cooling cavity between the bodies, which can be filled with cooling liquid. The cooling cavity communicates with the hollow cavity of the substrate. In this way, the LED module can dissipate heat through the hollow cavity and the cooling liquid in the cooling cavity, and the heat dissipation effect is good. . At the same time, a cooling fin is arranged on the casing, and the cooling fin further improves the heat dissipation effect of the LED module. The LED car headlight solves the balance problem of light source and heat dissipation, and can be used as a standard LED car headlight.

Further, the outer edge of the casing is provided with circularly arranged ventilation holes. The ventilation hole is used for heat dissipation. When the car is in a running state, the ventilation hole has convection, which accelerates the heat dissipation of the heat sink and the housing, and greatly improves the heat dissipation effect of the LED automobile headlight.

Further, the substrate is provided with a temperature measuring device. The temperature measuring device cooperates with the adapter control circuit to protect the LED module from overheating. Specifically: when the temperature sensed by the temperature measuring device is about to exceed the safe working temperature of the LED module, the power of the LED module can be adjusted through the control circuit in the power adapter. Therefore, the temperature measuring device can ensure the long-term stable and reliable operation of the LED automobile headlight within the allowable temperature range, thereby ensuring the safety of the automobile.

Further, both the reflective bowl and the substrate are made of metal. On the one hand, the metal reflective bowl can meet the needs of reflected light, and it can be made of aluminum, copper, etc., and its reflective surface can be made into a mirror; on the other hand, the metal reflective bowl has a good heat dissipation effect. The substrate is made of metal, which has good heat conduction and heat dissipation effects. At the same time, the base plate and reflective bowl can be welded.

Further, the housing is provided with a connecting portion. The connecting part is used for installation and connection. The connecting part is a mounting structure, and its function is to assemble the light emitting unit into the car light assembly, and to adjust the position of the light up, down, left and right. The connecting portion can be an ear plate with any shape and different assembly positions.

Further, the base plate is provided with a hollow tube for installing electric wires. The wires required for the LED module and the temperature measuring device pass through the base plate to the outside of the housing for connecting the adapter. The hollow tube is used for installing the wires, and at the same time it ensures the sealing of the cooling cavity formed by the housing and the reflective bowl it is good.

Further, LED signal lights arranged in a ring are fixed around the outer edge of the reflective bowl. The LED signal lamp can be an LED lamp bead or an LED lamp strip.

Further, the reflective bowl is divided into a first part and a second part, and the surfaces of the first part and the second part are both multi-curved surfaces. The LED modules are arranged on both sides of the substrate, wherein the first part, for example, may be an upper part, which is used to reflect the low beam LED module and form a low beam light source. Wherein the second part, for example, can be the lower part, which is used to reflect the high beam LED module, and can form a high beam light source.

Further, the heat dissipation fins are spiral. The spiral heat sink increases the effective heat dissipation area of the heat sink, and the heat dissipation effect is better.

Further, the LED modules are arranged on both sides of the substrate. For example, a low-beam LED module and a high-beam LED module can be respectively arranged on both sides of the substrate. For example, a dimming baffle is set on the low-beam LED module, which can form a cut-off line of light and dark in cooperation with the reflective bowl.

Compared with the prior art, the utility model has the beneficial effect that: the LED automobile headlamp uses a plurality of LED modules as light sources for standard light pattern design, and the LED modules can have high power and high luminous intensity. At the same time, its heat generation is large and the heat is very concentrated, so the organic combination of the LED car headlights uses four heat dissipation methods at the same time: the LED module is mounted on the metal substrate for heat conduction; the substrate is provided with a hollow cavity; The reflective bowl and the housing are provided with a cooling cavity filled with cooling liquid, and the hollow cavity communicates with the cooling cavity to generate liquid heat convection; a heat sink is provided on the housing for heat radiation; and the ventilation hole guides the air to the housing The heat sink is cooled by strong air. Therefore, through the comprehensive design of heat dissipation and light distribution, the LED car headlight can be used as a standard car light: strong luminous light, standard light distribution, good heat dissipation, and easy installation.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings used in the implementation manner will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model or The embodiment, therefore, should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

FIG. 1 shows a schematic cross-sectional structure diagram of an LED automobile headlamp.

FIG. 2 shows a schematic diagram of a partially enlarged structure at point A in FIG. 1 .

FIG. 3 shows a schematic diagram of a partially enlarged structure at B in FIG. 1 .

Fig. 4 shows a schematic structural diagram of a first viewing angle of an LED automobile headlight.

Fig. 5 shows a structural schematic diagram of a second viewing angle of an LED automobile headlamp.

Fig. 6 shows a structural schematic diagram of a third viewing angle of an LED automobile headlight.

Fig. 7 shows a schematic structural diagram of a fourth viewing angle of an LED automobile headlamp.

Fig. 8 shows another structural schematic diagram of the fourth viewing angle of the LED automobile headlight.

Explanation of main figures and symbols:

100-LED car headlights;

101-shell; 1011-ventilation hole; 1012-connection; 102-LED module; 1021-temperature measuring device; 10211-hollow tube; 103-reflective bowl; Substrate; 106-hollow cavity; 107-radiating fin; 108-dimming baffle; 109-first sealing ring; 110-second sealing ring; 111-panel; 112-liquid injection port.

Detailed ways

In order to facilitate the understanding of the present utility model, the LED automobile headlamp will be described more comprehensively below with reference to the relevant drawings. The accompanying drawings show the embodiments of LED automobile headlights, however, LED automobile headlights can be implemented in different forms, and are not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of LED automobile headlamp more thorough and comprehensive.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples" or "some examples" mean specific features described in connection with the embodiment or example, A structure, material, or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", "connection", "connection" and "communication" should be understood in a broad sense, for example, it may be mechanical Connection or electrical connection may also be the internal communication between two elements, either directly or indirectly through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations.

As shown in Figures 1 to 4, the LED automobile headlight 100 of the present utility model includes:

Housing 101;

LED module 102;

A reflective bowl 103, used to reflect the light emitted by the LED module 102, the reflective bowl 103 is fastened to the housing 101 and forms a cooling cavity 104 for storing cooling liquid;

A substrate 105, the LED module 102 is mounted on the substrate 105, the substrate 105 is provided with a hollow cavity 106, and the hollow cavity 106 communicates with the cooling cavity 104; and

The heat sink 107 , the heat sink 107 is shaped or attached to the housing 101 for dissipating heat to the housing 101 .

The LED automobile headlamp 100 uses an LED module 102 as a light source, and a high-power LED module 102 can be selected, which can meet the light intensity required for lighting, and can also play a role in energy saving, and the LED module 102 is attached to the substrate. 105, the substrate 105 is provided with a hollow cavity 106, and a cooling cavity 104 is provided between the reflective bowl 103 and the housing 101, wherein cooling liquid can be filled, and the cooling cavity 104 communicates with the hollow cavity 106 of the substrate 105, so that , the LED module 102 can dissipate heat through the hollow cavity 106 and the cooling liquid in the cooling cavity 104, and the heat dissipation effect is good. At the same time, a heat sink 107 is disposed on the housing 101 , and the heat sink 107 further improves the heat dissipation effect of the LED module 102 .

The housing 101 above is the housing of the LED automobile headlamp 100, and the housing 101 can be in any shape, not limited to regular circles, rectangles, etc. The housing 101 can be designed in different shapes according to specific needs. The casing 101 and the reflective bowl 103 form a cooling cavity 104, and it is necessary to ensure that the sealing between the casing 101 and the reflective bowl 103 is good, and a commonly used seal can be used to enhance the sealing effect.

The above-mentioned LED module 102 is the light source of the LED automobile headlamp 100. The LED module 102 includes LED light-emitting chips and corresponding integrated circuits. The LED module 102 is different from general low-power LED chips, which can provide sufficient For lighting, the LED module 102 needs to be connected with wires, which can pass through the substrate 105 to the rear of the housing 101 to facilitate connection with the power adapter.

The above-mentioned reflective bowl 103 is used to reflect light and play a role of focusing light. The reflective bowl 103 is connected with the housing 101 and forms a cooling cavity 104 for injecting cooling liquid. The reflective bowl 103 is provided with a reflective surface.

The substrate 105 is used to fix the LED module 102 , and the substrate 105 is provided with a hollow cavity 106 , and the hollow cavity 106 communicates with the cooling cavity 104 . The LED module 102 is attached and mounted on the substrate 105 .

The heat sink 107 is molded or fitted on the casing 101 . The heat sink 107 is a fin used to dissipate heat from the casing 101 . The heat sink 107 can be made of a heat dissipation material with good heat dissipation effect.

In addition, the LED automobile headlamp 100 also includes a panel 111 , an adapter and the like. The panel 111 is a transparent surface shell, which is installed in front of the reflective bowl 103. The panel 111 and the reflective bowl 103 are snapped together, for example, can be embedded and installed through concave and convex openings. In order to ensure that the snap-in is more reliable , can also be further connected using glue joints. The adapter is used to connect power to the LED module 102 .

Example 1

In this embodiment, the LED module 102 and the substrate 105 will be illustrated in detail.

The LED module 102 is a product formed by arranging LEDs (light-emitting diodes) according to certain rules and then packaging them together, and adding some waterproof treatment, that is, an LED module. The LED module 102 in the present utility model includes an LED light-emitting chip and a corresponding integrated circuit, and the LED module 102 is mounted on the substrate 105 by bonding.

Specifically, as shown in FIG. 5 and FIG. 6 , the LED modules 102 are disposed on both sides of the substrate 105 , and the temperature measuring device 1021 is disposed on the substrate 105 . The temperature measuring device 1021 can sense the temperature of the LED module 102 in real time and play the role of over-temperature protection.

In order to meet the requirements of the LED automobile headlamp 100 for low beam and high beam, LED modules 102 can be arranged on both sides of the substrate, and cooperate with the power adapter circuit to realize the function of alternately changing the high and low beams. In order to achieve low-beam standard light type, as shown in FIG. 6 , two groups of LED modules 102 can be arranged on the same side of the substrate 105 .

The substrate 105 in the utility model plays the role of fixing the LED module 102 , and it can be attached and installed with the LED module 102 . In this way, the substrate 105 is detachably connected to the reflective bowl 103 and the LED module 102 . It is easy to understand that when the base plate 105 is made of metal, it can be welded with the reflective bowl, as shown in FIG. Temperature device 1021. It should be noted that, in order to ensure that the wires required by the LED module 102 can be connected to the adapter behind the housing 101, a hollow tube 10211 can be provided. The hollow tube 10211 passes through the housing 101, the reflective bowl 103, and penetrates into In the substrate 105, one end of the hollow tube 10211 protrudes from the housing 101, and the other end goes deep into the substrate 105, so that the LED module 102 and the temperature measuring device 1021 on the substrate 105 can lead the wires out of the housing 101, so that the power supply adapter connection.

The substrate 105 in the utility model is provided with a temperature measuring device 1021, which senses the temperature of the LED module 102 in real time, and cooperates with the adapter control circuit to achieve an over-temperature protection function. When the temperature measuring device 1021 senses that the temperature exceeds When the LED module 102 is in a normal working range, the control circuit in the adapter turns off part of the LED chips in the LED module 102 to emit light, so as to reduce power and heat generation. Specifically, the temperature measuring device 1021 is provided with an integrated lead wire that is led out of the housing 101 through the hollow tube 10211 and connected to the temperature control circuit of the adapter.

The base plate 105 is provided with a hollow tube 10211 for installing electric wires, which is used to lead the electric wires to the power adapter while keeping the cooling cavity sealed.

The substrate 105 of the present invention is provided with a dimming baffle 108 for cooperating with the reflective bowl 103 to form a near light and dark cut-off line.

Example 2

In this embodiment, the reflective bowl 103 and the casing 101 will be illustrated in detail.

The reflective bowl 103 in the utility model is used for reflecting and focusing light. The reflective bowl 103 is connected to the housing 101 to form a cooling cavity 104, the connection between the reflective bowl 103 and the housing 101 is a sealed connection, specifically, the edge of the reflective bowl 103 and the housing 101 is sealed , this sealed connection can be connected through the first sealing ring 109 .

The periphery of the reflective bowl 103 in the present utility model is provided with LED lamp beads 1031, and the LED lamp beads 1031 are used as signal lamps. The LED lamp bead 1031 can dissipate heat by means of the reflective bowl 103 and the cooling cavity 104 to achieve the design effect of killing two birds with one stone.

It should be noted that the reflective bowl 103 and the housing 101 may be connected by fasteners, such as screw connection, or glue connection. In a specific embodiment, the edge of the housing 101 and the edge of the reflective bowl 103 are provided with a first sealing ring 109 and connected together by glue.

Reflective bowl 103 of the present utility model is made of metal, such as can adopt aluminum, copper etc., and this metal reflective bowl can guarantee the needs of reflected light, and it can adopt aluminum, copper etc. to make, and its reflective surface can be made mirror surface; On the one hand, the metal reflective bowl has a good heat dissipation effect.

It should be noted that when the LED modules 102 are arranged on both sides of the substrate 105 , the reflective bowl 103 is divided into a first part and a second part. In this case, the surfaces of the first part and the second part are both multi-curved surfaces. Wherein the first part, for example, may be an upper part for installing a low beam LED module, which may form a low beam light source. Wherein the second part, for example, can be the lower part, which is used to install the high beam LED module, which can form a high beam light source.

The above-mentioned first sealing ring 109 is a sealing ring in the prior art, and the first sealing ring 109 is used to prevent leakage of the cooling liquid in the cooling cavity 104 . The first sealing ring 109 can be designed according to the shape of the housing 101 and the reflective bowl 103. For example, when the reflective bowl 103 and the housing 101 have circular edges, the first sealing ring 109 can be an annular sealing ring. The section of the sealing ring 109 may be rectangular or circular.

It should be noted that the housing 101 is provided with a liquid injection port 112 for injecting cooling liquid. During initial assembly, cooling liquid can be added to the cooling cavity 104 through the liquid injection port 112. The liquid injection port 112 can also be For changing coolant. The liquid injection port 112 is provided with a switch, which is used to open and close the liquid injection port 112 , in order to ensure the sealing connection between the switch and the liquid injection port 112 , a second sealing ring can be arranged between the switch and the liquid injection port 112 .

Example 3

In this embodiment, the heat sink 107 , the ventilation hole 1011 , and the connecting portion 1012 will be described in detail with examples.

As shown in FIG. 1 and FIG. 4 , the heat sink 107 on the casing 101 is used to dissipate heat for the LED automobile headlight 100 , and the heat sink 107 mainly utilizes heat radiation to dissipate heat outward. Therefore, the shape and material of the heat sink 107 have a great influence on the heat dissipation effect of the heat sink 107 .

Specifically, the heat sink 107 can be a plurality of fins, and the fins can have a good heat dissipation effect. The cooling fins 107 can be configured as spiral fins. The spiral fins increase the heat dissipation area of the fins, and the heat dissipation effect is good. The heat sink 107 is a fin-shaped heat dissipation component made of thin material. After the heat sink 107 absorbs the heat, it dissipates the heat in the form of convection. In the process of convection heat dissipation, the heat dissipation area is mainly determined by the surface area of the heat sink 107. The larger the surface area, the better the heat dissipation effect; the smaller the surface area, the better the heat dissipation effect. The worse the cooling effect. In heat dissipation devices using fins, the commonly used methods mainly include: increasing the number of heat dissipation fins and increasing the length of heat dissipation fins. One of the data reflected is the "thickness ratio", that is, the thickness and height of the fins. The smaller the value, the denser the fins per unit volume can be made, the larger the number, the larger the effective heat dissipation surface area, and the better the heat dissipation performance.

The above-mentioned heat sink 107 may use a heat dissipation material with good heat dissipation effect.

As shown in FIG. 1 , FIG. 2 , FIG. 3 , and FIG. 4 , vent holes 1011 are provided on the edge of the casing 101 of the present invention to improve the heat dissipation effect of the heat sink 107 . Specifically, when wind passes through the ventilation hole 1011, the heat convection on the surface of the heat sink 107 can be accelerated, thereby achieving a good heat dissipation effect. When the car is running, the ventilation hole 1011 has convection, which accelerates the heat dissipation of the heat sink 107 and the housing 101 , and greatly improves the heat dissipation effect of the LED automobile headlamp 100 .

As shown in FIG. 7 and FIG. 8 , the connecting portion 1012 can be an ear plate with any shape and different assembly positions. The connecting part 1012 is used for installation and connection. The connecting part 1012 is a mounting structure, and its function is to assemble the LED automobile headlight 100 into the car light assembly, and it can be moved up, down, left and right. Adjust the light position. The connecting portion 1012 can be an ear plate of any shape.

Preferably, the ear plate also has an indication function, for example, in Figure 8, the upper button is pointed and the lower button is blunt, forming an arrow shape, which is intended to indicate the upper and lower installation positions to prevent inversion

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any skilled person familiar with the technical field can easily think of changes within the technical scope disclosed by the utility model Or replacement, all should be covered within the scope of protection of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. a kind of automotive LED headlamp, including shell, which is characterized in that further include：

LED module；

Reflector, the light sent out for reflecting the LED module, the reflector connect with the shell and surround for storing The cooling cavity of coolant liquid；

Substrate, the LED module are installed on the substrate, and the substrate is equipped with hollow cavity, the hollow cavity and the cooling type Chamber is connected to；And

Cooling fin, the cooling fin are set to the shell, for radiating to the shell.

2. automotive LED headlamp as described in claim 1, which is characterized in that the shell outer rim is equipped with and arranges in a ring Ventilation hole.

3. automotive LED headlamp as described in claim 1, which is characterized in that the substrate is equipped with temperature measuring equipment.

4. automotive LED headlamp as described in claim 1, which is characterized in that the reflector and the substrate are metal It is made.

5. automotive LED headlamp as described in claim 1, which is characterized in that the shell is equipped with interconnecting piece.

6. automotive LED headlamp as described in claim 1, which is characterized in that the substrate is equipped with the sky for installing electric wire Heart pipe.

7. automotive LED headlamp as described in claim 1, which is characterized in that the reflector outer circumference is installed in a ring The LED signal lamp of arrangement.

8. automotive LED headlamp as described in claim 1, which is characterized in that the reflector is divided into first part and second The surface of part, the first part and second part is more curved surfaces.

9. automotive LED headlamp as described in claim 1, which is characterized in that the cooling fin is spiral shape.

10. automotive LED headlamp as described in claim 1, which is characterized in that the substrate both sides are both provided with the LED Module.