Automobile LED headlamp

Abstract

The utility model discloses an automobile LED (light-emitting diode) headlamp, which comprises a substrate, ten heat pipes, a radiating seat and a radiating fan, the heat pipes comprise four first heat pipes, four second heat pipes and two third heat pipes; the two third heat pipes are arranged on the two sides of the substrate respectively, the two faces of the substrate are each provided with an LED lamp bead set, two first heat pipes and two second heat pipes, the two sides of each LED lamp bead set are each provided with one first heat pipe and one second heat pipe, and the first heat pipes and the second heat pipes on the same side of the LED lamp bead sets are located on the outer sides of the two ends of the LED lamp bead sets respectively. A receding opening is reserved; the heat dissipation base is provided with a fixing cavity for containing the substrate and the heat pipe. The heat dissipation base is provided with a light-emitting groove leading to the fixing cavity. The heat dissipation fan is arranged at the end part of the heat dissipation seat and is used for enhancing the heat dissipation capability of the heat dissipation seat; the contact area between each heat pipe and the heat dissipation seat is larger, so that heat generated by the LED lamp bead group can be transferred to the heat dissipation seat more quickly, and the heat dissipation effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lamps, in particular to an automobile LED headlamp. Background Art

[0002] Compared with traditional halogen lamps and xenon lamps, automotive LED headlights have the advantages of fast response, high brightness and energy saving, and have almost become standard equipment in cars at this stage.

[0003] In 2023, the applicant proposed an automotive LED headlamp with application number CN202321776111.2. In this application, the light-emitting groove is hollowed out on one side, so that the light on the hollow side will not be blocked by the heat sink and the second heat pipe, thereby reducing the generation of light spots. However, the first heat pipe will still partially block the light emitted by the LED lamp bead group, and because the heat sink is provided with a hollow structure, it not only reduces the contact area between the substrate and the heat pipe, reducing the heat dissipation effect, but also exposes the corners of the substrate to the external environment, making it prone to bumps and damage. In order to solve this problem, the applicant improved the structure of the automotive LED headlamp. Utility Model Content

[0004] The purpose of the utility model is to provide an automotive LED headlamp, aiming to solve the problems of existing automotive LED headlamps in which the heat pipe still partially blocks the light emitted by the LED lamp bead group, the heat dissipation effect needs to be improved, and the edges and corners of the substrate are exposed to the external environment and are prone to bumps and damage.

[0005] The utility model is implemented as follows: an automotive LED headlamp comprises a substrate, a heat pipe, a heat dissipation seat and a heat dissipation fan, the heat pipes comprising ten heat pipes, namely four first heat pipes, four second heat pipes and two third heat pipes, the length direction of each heat pipe is along the length direction of the substrate; the two third heat pipes are respectively arranged on both sides of the substrate, and a group of LED lamp bead groups, two first heat pipes and two second heat pipes are respectively arranged on both sides of the substrate, a first heat pipe and a second heat pipe are respectively arranged on both sides of the LED lamp bead group, and the first heat pipe and the second heat pipe on the same side of the LED lamp bead group are respectively located on the outside of the two ends of the LED lamp bead group to leave an avoidance opening; a fixed cavity for accommodating the substrate and the heat pipes is provided on the heat dissipation seat, a light-emitting groove leading to the fixed cavity is provided on the heat dissipation seat, and the light-emitting groove is aligned with the LED lamp bead group and the avoidance opening; the heat dissipation fan is arranged at the end of the heat dissipation seat to enhance the heat dissipation capacity of the heat dissipation seat.

[0006] Furthermore, a wire hole is provided at one end of the heat sink where the heat dissipation fan is mounted, and the control wire and the power wire of the heat dissipation fan pass through the wire hole.

[0007] Furthermore, the heat sink includes a first heat sink and a second heat sink that are mirror images and symmetrically arranged to each other, and the first heat sink and the second heat sink are fixedly connected by screws.

[0008] Furthermore, it also includes a chuck, which is sleeved on the heat sink and is used to fix the heat sink on the lamp cavity.

[0009] Furthermore, a limiting protrusion is provided on the heat sink, and the chuck has a sleeve portion, and a limiting groove adapted to the limiting protrusion is provided on the inner wall of the sleeve portion.

[0010] Furthermore, the LED lamp bead group is composed of six LED lamp beads arranged in an array, and the six LED lamp beads are arranged in an array according to two rows and three columns or two columns and three rows.

[0011] Furthermore, the first heat pipe and the second heat pipe are both wire mesh heat pipes.

[0012] Furthermore, the heat sink is coated with a heat dissipation layer.

[0013] Furthermore, the heat sink is made of aluminum alloy, and the substrate is made of copper.

[0014] Furthermore, a temperature sensor is provided on the substrate, the heat dissipation fan has a driver, the driving motor of the heat dissipation fan is a variable frequency motor, an MCU chip is provided in the driver, the temperature sensor and the driving motor are electrically connected to the MCU chip, and the MCU chip controls the driving motor to run at an adapted speed according to the temperature detected by the temperature sensor.

[0015] The present invention provides a relief opening between the first and second heat pipes, preventing them from blocking the light emitted by the LED lamp assembly. The third heat pipe also provides a larger contact area between each heat pipe and the heat sink, allowing for faster transfer of heat generated by the LED lamp assembly to the heat sink, effectively improving heat dissipation. Furthermore, the corners of the substrate are protected by the heat sink, preventing damage from bumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 It is the main view of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the substrate and heat pipe connected to each other in the utility model;

[0019] Figure 4This is a schematic diagram of the three-dimensional structure of the heat sink of the utility model in the first viewing angle;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the heat sink of the utility model at a second viewing angle;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the chuck of the utility model. DETAILED DESCRIPTION

[0022] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0024] like Figure 1 、 Figure 2 、 Figure 4 and Figure 6 As shown, the present invention provides an automotive LED headlamp, comprising a substrate 1, a heat pipe, a heat sink 2, a heat dissipation fan 3, and a chuck 7. The substrate 1 is made of copper and is provided with an LED lamp bead group 4. The LED lamp bead group 4 is composed of six LED lamp beads arranged in an array, and the six LED lamp beads are arranged in an array according to two rows and three columns or two columns and three rows. The heat dissipation fan 3 is provided at the end of the heat sink 2 to enhance the heat dissipation capacity of the heat sink 2. The chuck 7 is sleeved on the heat sink 2 and is used to fix the heat sink 2 to the lamp cavity. A limiting protrusion 204 is provided on the heat sink 2. The chuck 7 has a sleeve portion, and a limiting groove 701 is provided on the inner wall of the sleeve portion to match the limiting protrusion 204. When the chuck 7 is sleeved on the heat sink 2, the limiting protrusion 204 is inserted into the limiting groove 701, thereby effectively fixing the heat sink 2.

[0025] like Figure 1 、 Figure 3-Figure 5As shown, the heat pipes include ten heat pipes, namely four first heat pipes 5, four second heat pipes 6 and two third heat pipes 8. The length direction of each heat pipe is along the length direction of the substrate 1. The two third heat pipes 8 are respectively arranged on both sides of the substrate 1. A group of LED lamp bead groups 4, two first heat pipes 5 and two second heat pipes 6 are respectively arranged on both sides of the substrate 1. A first heat pipe 5 and a second heat pipe 6 are respectively arranged on both sides of the LED lamp bead group 4. The first heat pipe 5 and the second heat pipe 6 on the same side of the LED lamp bead group 4 are respectively located outside the two ends of the LED lamp bead group 4 to leave a avoidance. The avoidance ensures that the first heat pipe 5 and the second heat pipe 6 do not block the light emitted by the LED lamp bead group 4.

[0026] The arrangement of the heat pipes can also be understood as follows: when the base plate 1 is positioned vertically, the four first heat pipes 5 are positioned above the LED lamp group 4, the four second heat pipes 6 are positioned below the LED lamp group 4, and the two third heat pipes 8 are positioned on either side of the LED lamp group 4. Above the escape hatch, six heat pipes are arranged in two groups, each consisting of one third heat pipe 8 and two first heat pipes 5. Each group of heat pipes forms a "P" shape, wrapping around both sides of the base plate 1. Below the escape hatch, six heat pipes are arranged in two groups, each consisting of one third heat pipe 8 and two second heat pipes 6. Each group of heat pipes forms a "P" shape, wrapping around both sides of the base plate 1. In other words, except for the escape hatch, six heat pipes are arranged in two groups at all other locations on the base plate 1, each group of heat pipes forming a "P" shape, wrapping around both sides of the base plate 1. Both the first and second heat pipes 5, 6 are wire mesh heat pipes, with their wicks made of copper mesh, which provides greater heat transfer efficiency. The function of the heat pipe is to quickly transfer the heat of the substrate 1 to the heat sink 2. A heat sink 3 is provided on the heat sink 2. The heat sink 3 can quickly dissipate the heat transferred to the heat sink 2 by the heat pipe, thereby effectively improving the heat dissipation capacity of the present invention.

[0027] like Figure 1 、 Figure 3 and Figure 4 As shown, the heat sink 2 is provided with a fixed cavity 201 for accommodating the substrate 1 and the heat pipe. When the substrate 1 and the heat pipe are arranged in the fixed cavity 201, each heat pipe is close to the cavity wall of the fixed cavity 201. The heat sink 2 is made of aluminum alloy, which is economical and has strong thermal conductivity. The heat sink 2 is coated with a heat dissipation layer, which is obtained by spraying a graphene heat dissipation paint on the heat sink 2 and drying it. The heat dissipation layer can enhance the heat dissipation capacity of the heat sink 2, and accelerate the transfer of heat generated by the LED lamp bead group 4 and transferred to the heat sink 2 through each heat pipe to the external environment. The heat sink 2 is provided with a light-emitting groove 202 leading to the fixed cavity 201. The light-emitting groove 202 is aligned with the LED lamp bead group 4 and the avoidance port, so that the LED lamp bead group 4 and the avoidance port are exposed.

[0028] like Figure 4 and Figure 5As shown, the heat sink 2 includes a first heat sink and a second heat sink that are mirror images and symmetrically arranged. The first and second heat sinks are fixedly connected by screws. The end of the heat sink 2 where the cooling fan 3 is mounted is provided with a wire hole 203, through which the control and power lines of the cooling fan 3 pass.

[0029] In some exemplary embodiments, substrate 1 is provided with a temperature sensor, such as an NTC thermistor temperature sensor. Cooling fan 3 includes a driver, and the drive motor of cooling fan 3 is a variable-frequency motor. The driver includes an MCU chip, and both the temperature sensor and the drive motor are electrically connected to the MCU chip. A control program is implemented in the MCU chip to map the temperature detected by the temperature sensor to the operating frequency of the drive motor. In this way, the MCU chip can control the drive motor to operate at an appropriate speed based on the temperature detected by the temperature sensor, thereby achieving long-term energy savings.

[0030] In summary, the present invention provides a clearance opening between the first heat pipe 5 and the second heat pipe 6, preventing them from blocking the light emitted by the LED lamp bead group 4. The present invention also includes a third heat pipe 8. Compared to the prior art, each heat pipe in the present invention has a larger contact area with the heat sink 2, allowing for faster transfer of heat generated by the LED lamp bead group 4 to the heat sink 2, effectively improving the heat dissipation effect. Furthermore, the corners of the substrate 1 in the present invention are protected by the heat sink 2, preventing damage from bumps.

[0031] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An automotive LED headlamp, comprising a substrate (1), a heat pipe, a heat sink (2) and a heat dissipation fan (3), characterized in that: The heat pipes include ten heat pipes, namely four first heat pipes (5), four second heat pipes (6) and two third heat pipes (8), and the length direction of each heat pipe is along the length direction of the substrate (1); the two third heat pipes (8) are respectively arranged on both sides of the substrate (1), and a group of LED lamp beads (4), two first heat pipes (5) and two second heat pipes (6) are respectively arranged on both sides of the substrate (1), and a first heat pipe (5) and a second heat pipe (6) are respectively arranged on both sides of the LED lamp bead group (4), and the LED The first heat pipe (5) and the second heat pipe (6) on the same side of the LED lamp bead group (4) are respectively located outside the two ends of the LED lamp bead group (4) to leave an escape opening; the heat sink (2) is provided with a fixed cavity (201) for accommodating the substrate (1) and the heat pipe, and the heat sink (2) is provided with a light emitting groove (202) leading to the fixed cavity (201), and the light emitting groove (202) is aligned with the LED lamp bead group (4) and the escape opening; the heat dissipation fan (3) is provided at the end of the heat sink (2) to enhance the heat dissipation capacity of the heat sink (2).

2. The automotive LED headlamp according to claim 1, characterized in that: One end of the heat sink (2) where the heat dissipation fan (3) is mounted is provided with a wire hole (203), and the control wire and power wire of the heat dissipation fan (3) both pass through the wire hole (203).

3. The automotive LED headlamp according to claim 1, characterized in that: The heat sink (2) comprises a first heat sink and a second heat sink which are mirror images of each other and are symmetrically arranged; the first heat sink and the second heat sink are fixedly connected by screws.

4. The automotive LED headlamp according to claim 1, characterized in that: It also includes a chuck (7), which is sleeved on the heat sink (2), and is used to fix the heat sink (2) on the lamp cavity.

5. The automotive LED headlamp according to claim 4, characterized in that: A limiting protrusion (204) is provided on the heat sink (2), and the chuck (7) has a sleeve portion, and a limiting groove (701) adapted to the limiting protrusion (204) is provided on the inner wall of the sleeve portion.

6. The automotive LED headlamp according to claim 1, characterized in that: The LED lamp bead group (4) is composed of six LED lamp beads arranged in an array, and the six LED lamp beads are arranged in an array according to two rows and three columns or two columns and three rows.

7. The automotive LED headlamp according to claim 1, characterized in that: The first heat pipe (5) and the second heat pipe (6) are both wire mesh heat pipes.

8. The automotive LED headlamp according to claim 1, characterized in that: The heat dissipation seat (2) is coated with a heat dissipation layer.

9. The automotive LED headlamp according to claim 1, characterized in that: The heat sink (2) is made of aluminum alloy, and the base plate (1) is made of copper.

10. The automotive LED headlamp according to claim 1, characterized in that: A temperature sensor is provided on the substrate (1); the heat dissipation fan (3) has a driver; the drive motor of the heat dissipation fan (3) is a variable frequency motor; an MCU chip is provided in the driver; the temperature sensor and the drive motor are both electrically connected to the MCU chip; the MCU chip controls the drive motor to run at an adapted speed according to the temperature detected by the temperature sensor.

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