CN218379253U

CN218379253U - LED car headlamp fin samming heat pipe structure

Info

Publication number: CN218379253U
Application number: CN202222906672.1U
Authority: CN
Inventors: 梁俊明; 蔡建民; 周锋
Original assignee: Guangzhou Gemlight Technology Co ltd
Current assignee: Guangzhou Gemlight Technology Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-01-24
Anticipated expiration: 2032-11-01

Abstract

The utility model discloses a LED car headlamp fin samming heat pipe structure, wherein, including the samming heat pipe, the LED luminous element that is equipped with on the samming heat pipe, and be equipped with on the tip of samming heat pipe with the fin of samming heat pipe body coupling and the fan that is equipped with on fin. The LED luminous body comprises a tin-philic high-thermal-conductivity metal layer and a high-thermal-conductivity ceramic substrate which are sequentially welded on the uniform-temperature heat pipe, LED lamp beads arranged on the high-thermal-conductivity ceramic substrate, and positive electrodes and negative electrodes which are communicated with the LED lamp beads and arranged on the high-thermal-conductivity ceramic substrate. The utility model discloses have the effect that improves LED vehicle headlamps efficiency, and extension LED vehicle headlamps life.

Description

LED car headlamp fin samming heat pipe structure

Technical Field

The utility model relates to an automotive lighting field, in particular to LED car headlamp fin samming heat pipe structure.

Background

At present, the lamps applied to the illumination of automobile headlamps mainly adopt LED automobile headlamps, and the appearance of the lamps is almost the same as that of the traditional halogen lamps. However, since the LED is a semiconductor device and the light emitting efficiency is relatively directly affected by temperature, the LED automotive headlights on the market are now changed to an integrated active heat dissipation structure (as shown in fig. 1), which mainly comprises a metal bracket, heat dissipation fins integrally connected with the metal bracket, a metal-based printed circuit board MCPCB mounted on the end of the metal bracket, and LED lamp beads welded on the metal-based printed circuit board MCPCB; however, the integrated active heat dissipation structure has the defects that the heat power density of the lamp body structure is high, after heat generated by the LED lamp beads during working is conducted to the metal support connected with the heat dissipation fins through the metal-based printed circuit board (MCPCB), the heat is greatly in contact with each other, the heat of the lamp beads is difficult to be LED out, and thermal failure is easily caused, namely, the physical properties of the lamp beads are changed, such as light failure and color drift, so that the energy efficiency of the LED lamp is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model aims to provide an improve LED vehicle headlamps efficiency, and extension LED vehicle headlamps life's LED vehicle headlamps fin samming heat pipe structure.

In order to achieve the above object, the utility model provides a pair of LED car headlamp fin samming heat pipe structure, wherein, including samming heat pipe, the LED luminous element that is equipped with on samming heat pipe, and be equipped with on the tip of samming heat pipe with samming heat pipe body coupling's radiating fin and the fan that is equipped with on radiating fin.

The LED luminous body comprises a tin-philic high-thermal-conductivity metal layer and a high-thermal-conductivity ceramic substrate which are sequentially welded on the uniform-temperature heat pipe, LED lamp beads arranged on the high-thermal-conductivity ceramic substrate, and positive electrodes and negative electrodes which are communicated with the LED lamp beads and arranged on the high-thermal-conductivity ceramic substrate.

In some embodiments, the LED luminaries are respectively disposed on the front and back sides of the uniform temperature heat pipe.

In some embodiments, the isothermal heat pipe comprises a copper foil shell and a refrigeration packaging structure arranged on the inner wall of the copper foil shell. The refrigeration packaging structure comprises a capillary tube arranged on the inner wall of the copper foil shell, and a refrigerant which permeates into the inner gap of the capillary tube is filled in the copper foil shell. When the refrigerant permeates into the capillary tube, the LED luminous body generates heat, and an airflow space of heat vapor flow is formed in a hollow position in the copper foil shell.

In some embodiments, the capillary tubes are disposed on the top, bottom, and right or left sides, respectively, of the inner wall of the copper foil shell. The right side or the left side is designed so that the position of the heat seal in the copper foil case may be either the left side or the right side.

In some embodiments, the copper foil shell is internally evacuated.

In some embodiments, the capillary tube is a U-shaped copper sand block formed by sizing.

In some embodiments, the isothermal heat pipe is perpendicular to the heat dissipating fins.

In some embodiments, the LED emitter is disposed on an end of the isothermal heat pipe opposite the heat sink fins.

In some embodiments, the fan is disposed on the back of the heat dissipation fin corresponding to the uniform temperature heat pipe.

The beneficial effects of the utility model are that have the effect that improves LED vehicle headlamps efficiency, and extension LED vehicle headlamps life. In the prior art before improvement, a metal-based printed circuit board (MCPCB) is used as a carrier of the LED lamp beads, so that the heat resistance is realized in a certain procedure, and the part cost position of the whole structure is occupied. The improved structure adopts a uniform temperature heat pipe to replace a metal-based printed circuit board (MCPCB), LED lamp beads are directly welded on the uniform temperature heat pipe, and the uniform temperature heat pipe is directly and integrally connected with radiating fins, so that a metal support structure integrally connected with the radiating fins is omitted, the LED lamp beads can be directly attached to the uniform temperature heat pipe, the thermal resistance of the metal-based MCPCB link on a heat conduction path is reduced, heat can be quickly conducted to the radiating fins, the heat is prevented from being accumulated on the LED lamp beads, and the light efficiency of the LED lamp beads is improved; meanwhile, the temperature of the LED lamp beads is reduced in the using process, and the service life of the LED lamp beads is prolonged. Therefore, the effects of improving the energy efficiency of the LED automobile headlamp and prolonging the service life of the LED automobile headlamp are achieved.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

FIG. 2 is a schematic view of the present invention;

fig. 3 is a side view schematic structure diagram of the present invention;

FIG. 4 is a schematic structural diagram of the interior of the isothermal heat pipe shown in FIG. 2 and the flow of hot vapor;

FIG. 5 is a schematic diagram of the LED illuminator of FIG. 2;

FIG. 6 is a schematic side view of the LED illuminator of FIG. 2;

fig. 7 is a schematic structural diagram of the fan shown in fig. 2.

FIG. 8 is a schematic structural diagram of a first manufacturing sequence of the medium temperature equalizing heat pipe of the present invention;

FIG. 9 is a schematic structural diagram of a second manufacturing sequence of the medium temperature equalizing heat pipe of the present invention;

FIG. 10 is a schematic structural view of a third manufacturing sequence of the medium temperature equalizing heat pipe of the present invention;

FIG. 11 is a structural schematic diagram of a fourth manufacturing sequence of the medium temperature equalizing heat pipe of the present invention;

FIG. 12 is a schematic structural view of a fifth manufacturing sequence of the medium temperature equalizing heat pipe of the present invention;

FIG. 13 is a schematic structural view of a sixth manufacturing sequence of the medium temperature equalizing heat pipe of the present invention;

fig. 14 is a schematic structural diagram of a seventh manufacturing sequence of the medium temperature equalizing heat pipe of the present invention.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-8, a LED vehicle headlamp fin temperature-equalizing heat pipe structure includes a temperature-equalizing heat pipe 01, an LED illuminant 02 fixedly mounted above the temperature-equalizing heat pipe 01, a heat-dissipating fin 03 integrally connected to the temperature-equalizing heat pipe 01 and a fan 04 mounted on the heat-dissipating fin 03 at an end of the temperature-equalizing heat pipe 01. The LED luminous body 02 comprises a tin-philic high-thermal-conductivity metal layer 21 and a high-thermal-conductivity ceramic substrate 22 which are sequentially welded on the uniform-temperature heat pipe 01, an LED lamp bead 23 arranged on the high-thermal-conductivity ceramic substrate 22, and a positive electrode 24 and a negative electrode 25 which are communicated with the LED lamp bead 23 and arranged on the high-thermal-conductivity ceramic substrate 22. The high thermal conductivity ceramic substrate 22 has the same shape as the tin-philic high thermal conductivity metal layer 21, and the size is slightly larger than or equal to the tin-philic high thermal conductivity metal layer 21. The LED luminous bodies 02 are respectively arranged on the front and the back of the uniform temperature heat pipe 01. The temperature equalizing heat pipe 01 comprises a copper foil shell 11 and a refrigeration packaging structure 12 arranged on the inner wall of the copper foil shell 11.

The refrigeration package structure 12 includes a capillary tube 121 disposed on the inner wall of the copper foil housing 11, and a refrigerant filled in the copper foil housing 11 and penetrating into the inner space of the capillary tube 121. The phenomenon that the refrigerant permeates into the capillary tube 121 is called a capillary phenomenon, and means a phenomenon that the wetting liquid rises in the capillary tube and a phenomenon that the non-wetting liquid falls in the capillary tube. The tube capable of producing significant capillary phenomenon is called capillary tube 121. When the refrigerant permeates into the capillary 121, the LED emitter 02 generates heat, and an airflow space for heat vapor flow is formed in a hollow position inside the copper foil case 11. The capillary tubes 121 are respectively disposed on the top, bottom and right or left side surfaces of the inner wall of the copper foil housing 11. The copper foil shell 11 is internally evacuated. The capillary 121 is a U-shaped copper sand block formed by sizing. The temperature-equalizing heat pipe 01 is perpendicular to the heat dissipation fins 03. The LED luminous body 02 is disposed on the end of the temperature-equalizing heat pipe 01 opposite to the heat dissipating fin 03. The fan 04 is disposed on the back surface of the heat dissipation fin 03 corresponding to the temperature equalization heat pipe 01.

When the LED lamp is used, the LED luminous body 02 is directly welded on the uniform temperature heat pipe 01, and the purpose of heat dissipation is achieved mainly because heat generated by the LED lamp beads 23 is conducted in a heat conduction mode. That is, when the LED luminaries 02 located above and below the uniform temperature heat pipe 01 generate heat and respectively conduct (input) the heat to the inside of the uniform temperature heat pipe 01, the refrigerant passing through the gap between the capillary 121 and the inside of the capillary 121 is heated and evaporated, and the liquid refrigerant is heated and evaporated to become a hot vapor stream, because the temperature difference exists between the hot source end inside the uniform temperature heat pipe 01 and the combining end of the uniform temperature heat pipe 01 and the heat dissipating fin 03, the hot vapor stream flows to the side close to the heat dissipating fin 03 in the air flow space inside the copper foil housing 11, and because the temperature difference between the high-temperature gaseous state of the refrigerant at the combining end of the uniform temperature heat pipe 01 and the heat dissipating fin 03 causes rapid condensation, the capillary tube 121 has a capillary phenomenon, and the liquid refrigerant is caused to return to the inner space of the heat pipe near the bead end again, thereby forming a continuous liquid-gaseous circulation. The above internal circulation state makes the whole heat pipe in uniform temperature state.

The manufacturing process of the uniform temperature heat pipe is as follows:

as shown in fig. 8, a fixing bar 10 which does not contact with the inner wall of the copper foil case 11 is inserted into the semi-closed copper foil case 11 in a suspended manner. As shown in fig. 9, the gap between the inner wall of the copper foil case 11 and the fixing bar 10 is filled with copper sand. As shown in fig. 10, after high-temperature sintering, the copper sand is uniformly adhered to the tube wall to a certain thickness, and the copper sand is bonded to each other with a gap (the gap is in the shape of an irregular capillary 121). As shown in fig. 11, the fixing bar 10 is withdrawn. As shown in fig. 12, the refrigerant is charged into the copper foil case 11, and the refrigerant automatically diffuses into the gaps between the copper grits due to the capillary phenomenon 121. As shown in fig. 13, air is drawn into the copper foil case 11 enclosed in half so that the refrigerant does not vaporize. As shown in fig. 14, the opening of the copper foil casing 11 is sealed while air is being drawn, and a heat seal position is formed between the inner side wall of the opening and the end of the copper sand, thereby completing the manufacture of the uniform temperature heat pipe 01.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. A LED automobile headlamp fin temperature-equalizing heat pipe structure is characterized by comprising a temperature-equalizing heat pipe, an LED luminous body arranged on the temperature-equalizing heat pipe, a heat dissipation fin integrally connected with the temperature-equalizing heat pipe and a fan arranged on the heat dissipation fin, wherein the end part of the temperature-equalizing heat pipe is provided with the heat dissipation fin;

the LED luminous body include the high heat conductivity metal level of the hydrophilic tin type and the high heat conductivity ceramic substrate that weld in proper order on the samming heat pipe, the LED lamp pearl that is equipped with on the high heat conductivity ceramic substrate, and be equipped with positive electrode and the negative electrode that switches on with LED lamp pearl on the high heat conductivity ceramic substrate.

2. The LED automobile headlamp fin temperature equalization heat pipe structure as claimed in claim 1, wherein the LED luminous bodies are respectively arranged on the front and back surfaces of the temperature equalization heat pipe.

3. The finned temperature-equalizing heat pipe structure of the LED automobile headlamp as claimed in claim 2, wherein the temperature-equalizing heat pipe comprises a copper foil shell and a refrigeration packaging structure arranged on the inner wall of the copper foil shell;

the refrigeration packaging structure comprises a capillary tube arranged on the inner wall of a copper foil shell, and a refrigerant which permeates into the inner gap of the capillary tube is filled in the copper foil shell;

after the refrigerant permeates into the capillary tube, the LED luminous body generates heat, and an airflow space of hot vapor flow is formed in the hollow position in the copper foil shell.

4. The finned temperature-equalizing heat pipe structure of the LED automobile headlamp as claimed in claim 3, wherein the capillary tubes are disposed on the top, bottom and right or left side surfaces of the inner wall of the copper foil casing, respectively.

5. The LED automobile headlamp fin temperature equalization heat pipe structure as claimed in claim 3 or 4, wherein the copper foil shell is internally evacuated.

6. The LED automobile headlamp fin temperature-equalizing heat pipe structure according to claim 4, wherein the capillary tube is a U-shaped copper sand block formed by sizing.

7. The LED automobile headlamp fin temperature equalization heat pipe structure as claimed in claim 3, wherein the temperature equalization heat pipe is perpendicular to the heat dissipation fin.

8. The LED automobile headlamp fin temperature equalization heat pipe structure as claimed in claim 1, wherein the LED light emitter is disposed on an end portion of the temperature equalization heat pipe opposite to the heat dissipation fin.

9. The LED automotive headlamp fin temperature equalization heat pipe structure as claimed in claim 8, wherein the fan is disposed on the back surface of the heat dissipation fin corresponding to the temperature equalization heat pipe.