CN111928201A

CN111928201A - LED headlight bulb system with double heat dissipation of liquid cooling and heat pipe

Info

Publication number: CN111928201A
Application number: CN202010853195.XA
Authority: CN
Inventors: 王公利; 李尚英; 杨成秋
Original assignee: Jinan Dede Environmental Protection Technology Co ltd
Current assignee: Jinan Dede Environmental Protection Technology Co ltd
Priority date: 2020-08-22
Filing date: 2020-08-22
Publication date: 2020-11-13

Abstract

The application provides a liquid cooling and hot tube dual-radiating LED headlamp bulb system, which comprises an LED headlamp bulb, a cooling liquid circulating pump, a cooling liquid tube, a cooling liquid box, a radiating fan and a water cooling drain, wherein the cooling liquid circulating pump is arranged in the cooling liquid box; the LED headlamp bulb comprises a left LED lamp bead, a right LED lamp bead, a left copper substrate, a right copper substrate, a lamp post, a heat pipe and a heat exchange liquid storage tank; the left copper substrate is in braze welding connection with the evaporation section of the heat pipe, the right copper substrate is in braze welding connection with the evaporation section of the heat pipe, the condensation section of the heat pipe penetrates through the insertion pipe through hole and enters the heat exchange liquid storage tank so as to be used for enabling the condensation section of the heat pipe to be in direct contact with cooling liquid in the heat exchange liquid storage tank to generate heat exchange, and a liquid inlet and a liquid outlet of the cooling liquid are arranged on the tank wall of the heat exchange liquid storage tank; the LED lamp bead in the LED headlamp bulb is subjected to dual heat dissipation by the combined action of the liquid cooling and the heat pipe, the heat dissipation effect and the heat dissipation efficiency of the LED lamp bead are improved, and the service performance and the service life of the LED lamp bead are further improved.

Description

LED headlight bulb system with double heat dissipation of liquid cooling and heat pipe

Technical Field

The invention relates to the technical field of LED (light-emitting diode) headlamp bulbs, in particular to an LED headlamp bulb system with double heat dissipation of liquid cooling and a heat pipe.

Background

The automobile headlamp assembly is arranged at the left end and the right end of the head of an automobile and used for illuminating at night or on a dim road surface when the automobile runs, and comprises a lampshade positioned on the front side, a shell positioned on the back side, a dipped headlight, a high beam, a steering light, a fog light, a daytime running light, a width indicating light, a circuit and the like which are integrated together, and the automobile headlamp assembly is called as a headlamp assembly. The automobile headlamp assembly specifically comprises the lamps, and the lamps can be selectively arranged and combined according to the principles of different configurations, different models and the like. The dipped headlight, the high beam, the steering light, the fog light, the daytime running light, the width indicating light and other lights are mutually independent set of light system under the common condition, each light works independently, and each light comprises a corresponding bulb, a reflecting cup and other structures.

The headlights of the car headlight assembly are the headlights, and the headlight bulbs (including the bulbs of the high beam and the low beam) of the car headlight assembly are the halogen headlight bulbs, the xenon headlight bulbs and the current advanced LED headlight bulbs with the technological progress.

The light-emitting principle of the LED lamp determines that the LED lamp needs to be forcibly, timely and well radiated, and the radiating problem is a main factor influencing the service life of the LED lamp. The LED chip is sensitive to temperature change, and the heat dissipation problem not only can influence the service life of the LED chip, but also can influence the luminous brightness of the LED chip. Therefore, the heat dissipation design of the LED lamp must be designed from the LED chip to the whole LED headlamp bulb, and each link needs to be paid attention.

At present, LED headlight bulb among the prior art is mostly the forced air cooling heat dissipation, and the radiating mode of the radiating LED headlight bulb of forced air cooling among the prior art is: LED lamp pearl is many to be set up on the circuit layer of aluminium base board or copper base board, aluminium base board or copper base board are including the circuit layer that arranges in proper order, insulating layer and metal-based layer, the heat that LED lamp pearl produced at first transmits for metal-based layer through the insulating layer of electrical insulation but high heat conduction, then the heat on the metal-based layer transmits earlier for the heat pipe, the lamp pole of aluminum alloy material is transmitted by the heat pipe again, then because the lamp pole is inserted in heat radiation fins's axial through hole, heat on the lamp pole transmits again for heat radiation fins, radiator fan rotates the suction and produces the wind that flows and passes through between the adjacent fin in the heat radiation fins, cold wind becomes hot-blast, take away the heat on the heat radiation fins, thereby accomplish the whole: namely, heat is transferred for 5 times in the middle of cooling air generated by the operation of the LED lamp bead → the copper base layer in the copper substrate → the heat pipe → the lamp post → the heat dissipation fin → the heat dissipation fan, wherein the first 4 times are heat conduction, and the last time is heat convection.

The existing air-cooled radiating LED headlamp bulb is divided into two parts according to whether a lamp post is divided into two parts: the LED headlamp bulb comprises an LED headlamp bulb with an integrated lamp post, and an LED headlamp bulb formed by splicing a left half lamp post and a right half lamp post; the lamp post of the LED headlamp bulb of the integrated lamp post is of an integrated structure and is not separated; the lamp post of the LED headlamp bulb formed by splicing the left half lamp post and the right half lamp post is divided into a left half lamp post and a right half lamp post which are respectively the left half lamp post and the right half lamp post; the lamp post is of an integrated structure or is divided into a left half and a right half, and the two have the advantages and are widely applied.

At present, the cooling mode or the heat dissipation mode mainly includes air cooling, heat pipe heat dissipation and liquid cooling, for example, the CPU radiator includes an air cooling CPU radiator, a heat pipe CPU radiator and a liquid cooling CPU radiator; in general, the heat dissipation capability of a liquid-cooled heat sink is greater than the heat dissipation capability of a heat pipe heat sink is greater than the air-cooled heat dissipation capability.

Therefore, how to adopt the combined action of the liquid cooling and the heat pipe to carry out dual heat dissipation on the LED lamp bead in the LED headlamp bulb formed by splicing the left half lamp post and the right half lamp post improves the heat dissipation effect and the heat dissipation efficiency of the LED lamp bead in the LED headlamp bulb, and further improves the service performance and the service life of the LED lamp bead is a technical problem which needs to be solved urgently by technical personnel in the field.

Disclosure of Invention

The invention aims to provide an LED headlamp bulb system with double heat dissipation of liquid cooling and a heat pipe.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the LED headlamp bulb system comprises an LED headlamp bulb, a cooling liquid circulating pump, a cooling liquid pipe, a cooling liquid box, a cooling fan and a water cooling row, wherein the cooling liquid circulating pump is used for conveying cooling liquid;

the LED headlamp bulb comprises a left LED lamp bead, a right LED lamp bead, a left copper substrate, a right copper substrate, a lamp post, a heat pipe and a heat exchange liquid storage tank, wherein the left LED lamp bead and the right LED lamp bead are used for emitting light;

the lamp post comprises a left half lamp post and a right half lamp post;

the inner length and width surface of the left half lamp post is provided with a tube placing groove for placing a heat tube, the inner length and width surface of the right half lamp post is provided with a tube placing groove for placing a heat tube, and the bottom surface of an inner groove of the tube placing groove is provided with a plate placing groove for placing a copper substrate;

the left copper substrate and the right copper substrate respectively comprise a circuit layer, an insulating layer and a copper base layer which are sequentially superposed, the left LED lamp bead is arranged on the circuit layer in the left copper substrate in a brazing mode, and the right LED lamp bead is arranged on the circuit layer in the right copper substrate in a brazing mode;

the heat pipe comprises an evaporation section positioned at the upper side, a heat insulation section positioned in the middle and a condensation section positioned at the lower side;

the right long and wide surface of the copper base layer of the left copper substrate is in braze welding connection with the left long and wide surface of the evaporation section of the heat pipe, and the left long and wide surface of the copper base layer of the right copper substrate is in braze welding connection with the right long and wide surface of the evaporation section of the heat pipe, so that the left copper substrate, the heat pipe and the right copper substrate are in braze welding connection;

the left copper substrate is placed in a plate placing groove on the left half lamp post, the right copper substrate is placed in a plate placing groove on the right half lamp post, a tube placing groove on the left half lamp post and a tube placing groove on the right half lamp post are spliced into a post inner cavity, the heat pipe is placed in the post inner cavity, a bolt penetrates through the left half lamp post and the right half lamp post to be used for connecting and superposing the left half lamp post and the right half lamp post together through the bolt to be spliced into a complete lamp post, and the left copper substrate, the heat pipe and the right copper substrate which are brazed and connected together are clamped and fixed in the lamp post by the left half lamp post and the right half lamp post from the left direction and the right direction;

the tube placing groove on the left half lamp post extends downwards until the bottom end face of the left half lamp post and the tube placing groove on the right half lamp post extends downwards until the bottom end face of the right half lamp post so as to enable the bottom end of the cavity in the post to be open, and the condensation section of the heat pipe extends out of the bottom end opening of the cavity in the post so as to enable the condensation section to be exposed out of the lamp post;

the bottom end of the left half lamp post is welded and fixed on the outer surface of the wall of the heat exchange liquid storage tank, and the bottom end of the right half lamp post is welded and fixed on the outer surface of the wall of the heat exchange liquid storage tank;

a tube inserting through hole is formed in the wall of the heat exchange liquid storage tank, and a condensing section exposed outside the lamp post penetrates through the tube inserting through hole to enter the heat exchange liquid storage tank so as to be used for enabling the condensing section of the heat pipe to be in direct contact with cooling liquid in the heat exchange liquid storage tank to generate heat exchange;

the pipe wall of the heat pipe is hermetically welded with the intubation through hole so as to prevent liquid from leaking outwards from the intubation through hole;

a liquid inlet for feeding cooling liquid into the heat exchange liquid storage tank is formed in the wall of the heat exchange liquid storage tank, and a liquid outlet for discharging the cooling liquid from the heat exchange liquid storage tank is formed in the wall of the heat exchange liquid storage tank;

the inlet of coolant liquid circulating pump pass through the coolant liquid pipe with the liquid outlet intercommunication of coolant liquid case, the liquid outlet of coolant liquid circulating pump pass through the coolant liquid pipe with the inlet intercommunication of heat transfer liquid reserve tank, the liquid outlet of heat transfer liquid reserve tank pass through the coolant liquid pipe with the inlet intercommunication of water-cooling row, the liquid outlet of water-cooling row pass through the coolant liquid pipe with the inlet intercommunication of coolant liquid case for be used for constituting the circulation flow return circuit of coolant liquid, radiator fan sets up in the water-cooling is arranged in order to be used for producing the cooling-air and carries out the heat dissipation of blowing to the coolant liquid in the water-cooling row.

Preferably, the tube placing groove on the left half lamp post extends upwards to the top end face of the left half lamp post, the tube placing groove on the right half lamp post extends upwards to the top end face of the right half lamp post so as to enable the top end of the cavity in the lamp post to be open, the evaporation section of the heat pipe extends out of the top end opening of the cavity in the lamp post so as to enable the upper part of the evaporation section to be exposed out of the lamp post, and the evaporation section of the heat pipe is in direct contact with air in the lamp cavity to exchange heat.

Preferably, the length of the evaporation section of the heat pipe is 20mm to 50mm, the length of the part of the evaporation section of the heat pipe, which is used for being in braze welding connection with the left copper substrate and the right copper substrate, is 10mm to 25mm, the length of the part of the evaporation section of the heat pipe, which extends out of the top end opening of the cavity in the column, is 10mm to 25mm, the length of the heat insulation section of the heat pipe is 40mm to 80mm, and the length of the condensation section of the heat pipe is 20mm to 50 mm.

Preferably, a gap is left between the outer surface of the heat pipe and the inner surface of the cavity in the column for avoiding the contact between the outer surface of the heat pipe and the inner surface of the cavity in the column;

the heat pipe is sleeved with a heat insulation pipe for heat insulation and heat preservation on the part of the heat pipe, which is positioned in the inner cavity of the column and is not in brazing connection with the left copper substrate and the right copper substrate, and the heat insulation pipe is sleeved in the inner cavity of the column.

Preferably, the left LED lamp bead is exposed from a rectangular through hole in the bottom wall of the plate placing groove in the left half lamp post;

and the right LED lamp bead is exposed from the rectangular through hole on the bottom wall of the board placing groove on the right half lamp post.

Preferably, the LED lamp also comprises a driving power supply circuit board for providing direct current for the left LED lamp bead and the right LED lamp bead;

the bottom surface of the inner groove of the pipe placing groove is also provided with a threading groove for accommodating a concealed wire, and the plate placing groove is communicated with the threading groove;

a positive wire I and a negative wire I for supplying power to the left LED lamp bead enter the threading grooves on the left half lamp post from through holes in the lower part of the left half lamp post, then the positive wire I and the negative wire I penetrate through the threading grooves on the left half lamp post and are finally electrically connected with a positive electrode and a negative electrode on the left copper substrate respectively;

a positive wire II and a negative wire II for supplying power to the right LED lamp bead enter the threading grooves on the right half lamp post from the through holes at the lower part of the right half lamp post, then the positive wire II and the negative wire II penetrate the threading grooves on the right half lamp post and are finally electrically connected with the positive electrode and the negative electrode on the right copper substrate respectively;

the left LED lamp bead is electrically connected with the driving power supply circuit board, and the right LED lamp bead is electrically connected with the driving power supply circuit board.

Preferably, the left half lamp post, the right half lamp post and the heat exchange liquid storage tank are all made of aluminum alloy materials.

The application provides a liquid cooling and hot tube dual-radiating LED headlamp bulb system, which comprises an LED headlamp bulb, a cooling liquid circulating pump, a cooling liquid tube, a cooling liquid box, a radiating fan and a water cooling drain, wherein the cooling liquid circulating pump is arranged in the cooling liquid box;

the LED headlamp bulb comprises a left LED lamp bead, a right LED lamp bead, a left copper substrate, a right copper substrate, a lamp post, a heat pipe and a heat exchange liquid storage tank;

the condensation section of the heat pipe penetrates through the intubation through hole to enter the heat exchange liquid storage tank so as to be in direct contact with cooling liquid in the heat exchange liquid storage tank for heat exchange;

here, the whole heat dissipation process of the LED headlight bulb that this application provided does: the heat generated by the LED lamp beads → the copper base layer in the copper substrate → the evaporation section of the heat pipe → the condensation section of the heat pipe → the cooling liquid in the heat exchange liquid storage tank, then the cooling liquid in the heat exchange liquid storage tank flows into the water cooling row for heat dissipation and cooling, and then the cooling liquid cooled in the water cooling row flows back to the heat exchange liquid storage tank, so that a circulating flow cooling loop of the cooling liquid is formed;

so, this application has realized adopting the liquid cooling and the two combined action of heat pipe heat dissipation to carry out dual heat dissipation to the LED lamp pearl in the LED headlight bulb that half left lamp pole and half right lamp pole were pieced together, has improved the radiating effect and the radiating efficiency of the LED lamp pearl in the LED headlight bulb, and then has improved the performance and the life of LED lamp pearl.

Drawings

Fig. 1 is a schematic diagram of an operating principle of an LED headlamp bulb in an LED headlamp bulb system with dual heat dissipation of liquid cooling and heat pipe according to an embodiment of the present invention (an automotive headlamp assembly in the prior art is not a structure as shown in fig. 1, fig. 1 is a structure obtained by cutting out one low beam lamp or one high beam lamp from a complete set of structures of the automotive headlamp assembly in the prior art, fig. 1 is a schematic diagram of a structure of the automotive headlamp assembly in the prior art, and fig. 1 is a schematic diagram of a structure of an LED headlamp bulb cut along an axial central plane;

since the cooling liquid circulating pump, the cooling liquid pipe, the cooling liquid tank, the water cooling bar and the cooling fan are all common devices in the liquid cooling heat dissipation system in the prior art, and are not innovative in the present application, and since there are 2 ports in total for the liquid inlet and the liquid outlet, the connection of the cooling liquid pipe is complicated, and one a4 paper can not be placed in the cooling liquid pipe, the cooling liquid circulating pump, the cooling liquid pipe, the cooling liquid tank, the water cooling bar and the cooling fan are not shown in fig. 1);

FIG. 2 is an enlarged 2-fold view of a sectional structure diagram of an axial center plane of the LED headlamp bulb in FIG. 1;

3 FIG. 3 3 3 is 3 a 3 schematic 3 sectional 3 view 3 taken 3 along 3 the 3 line 3 A 3- 3 A 3 of 3 the 3 lamp 3 post 3 of 3 FIG. 3 2 3; 3

FIG. 4 is a schematic cross-sectional view taken along line B-B of the lamp post of FIG. 2;

fig. 5 is a schematic perspective view (from front left to back right) of the left half lamppost in fig. 2;

FIG. 6 is a schematic diagram of a right-side view of the left half lamppost in FIG. 5;

fig. 7 is an enlarged 2-fold schematic view of a sectional structure of an axial center plane of an LED headlamp bulb in a liquid-cooled and heat pipe dual heat dissipation LED headlamp bulb system according to another embodiment of the present invention;

in the figure: 101 left LED lamp bead, 102 right LED lamp bead;

2, a lamp post, 201 a left copper base plate, 202 a right copper base plate, 203 a left half lamp post, 204 a right half lamp post, 205 a plate placing groove, 206 a threading groove, 207 a brazing layer, 209 a positive electrode wire I, 210 a negative electrode wire I, 211 a positive electrode wire II, 212 a negative electrode wire II, 213 a rectangular through hole, 214 a through hole at the lower part of the left half lamp post, 215 a through hole at the lower part of the right half lamp post, 216 a tube placing groove, 217 a bolt, 218 a countersunk hole of which a bolt is inserted;

3 heat pipe, 301 evaporation section, 302 heat insulation section, 303 condensation section, 304 pipe shell, 305 wick, 306 end cover;

4, a liquid inlet on the 401 heat exchange liquid storage tank and a liquid outlet on the 402 heat exchange liquid storage tank;

5, a heat preservation pipe;

6, mounting a ring;

7 lamp shade, 8 outer shell, 9 reflecting cup, 10 lamp cavity;

11 raised pipe, 12 dust cap, 1201 dust cap bottom wall for coolant pipe through the through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "axial", "radial", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, and the terms "center", "axial", "radial", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. in the remaining drawings indicate orientations or positional relationships consistent with the orientations or positional relationships in fig. 1, so as to merely facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second", may explicitly or implicitly include one or more of the features.

In the present invention, unless otherwise expressly stated or limited, the first feature being "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to the accompanying drawings 1-7, wherein: a left LED lamp bead 101 and a right LED lamp bead 102; the lamp post 2, the left copper base plate 201, the right copper base plate 202, the left half lamp post 203, the right half lamp post 204, the plate placing groove 205, the threading groove 206, the brazing layer 207, the positive electrode wire I209, the negative electrode wire I210, the positive electrode wire II 211, the negative electrode wire II 212, the rectangular through hole 213, the through hole 214 at the lower part of the left half lamp post 203, the through hole 215 at the lower part of the right half lamp post 204, the tube placing groove 216, the bolt 217 and the countersunk hole 218 for inserting the bolt 217; heat pipe 3, evaporation section 301, heat insulation section 302, condensation section 303, pipe shell 304, wick 305, end cap 306; a heat exchange liquid storage tank 4, a liquid inlet 401 on the heat exchange liquid storage tank 4, and a liquid outlet 402 on the heat exchange liquid storage tank 4; a heat preservation pipe 5; a mounting ring 6; the lamp comprises a lampshade 7, a shell 8, a reflecting cup 9 and a lamp cavity 10; the raised pipe 11, the dust cover 12, and the through hole 1201 on the bottom wall of the dust cover for the coolant pipe to pass through.

The application provides a liquid cooling and hot tube dual-radiating LED headlamp bulb system, which comprises an LED headlamp bulb, a cooling liquid circulating pump, a cooling liquid pipe for conveying cooling liquid, a cooling liquid box for storing the cooling liquid, a radiating fan and a water cooling row for radiating the cooling liquid;

the LED headlamp bulb comprises a left LED lamp bead 101, a right LED lamp bead 102, a left copper substrate 201, a right copper substrate 202, a lamp post 2, a heat pipe 3 for heat conduction and a heat exchange liquid storage tank 4 for heat exchange and cooling liquid storage, wherein the left LED lamp bead and the right LED lamp bead 102 are used for emitting light;

the lamp post 2 comprises a left half lamp post 203 and a right half lamp post 204;

a pipe placing groove 216 for placing the heat pipe 3 is formed in the inner length-width surface of the left half lamp post 203, a pipe placing groove 216 for placing the heat pipe 3 is formed in the inner length-width surface of the right half lamp post 204, and a plate placing groove 205 for placing a copper substrate is formed in the bottom surface of an inner groove of the pipe placing groove 216;

the left copper substrate 201 and the right copper substrate 202 respectively comprise a circuit layer, an insulating layer and a copper base layer which are sequentially overlapped, the left LED lamp bead 101 is arranged on the circuit layer in the left copper substrate 201 in a brazing mode, and the right LED lamp bead 102 is arranged on the circuit layer in the right copper substrate 202 in a brazing mode;

the heat pipe 3 comprises an evaporation section 301 at the upper side, an insulation section 302 at the middle, and a condensation section 303 at the lower side;

the right long and wide surface of the copper base layer of the left copper substrate 201 is connected with the left long and wide surface of the evaporation section 301 of the heat pipe 3 by brazing, and the left long and wide surface of the copper base layer of the right copper substrate 202 is connected with the right long and wide surface of the evaporation section 301 of the heat pipe 3 by brazing, so as to braze the left copper substrate 201, the heat pipe 3 and the right copper substrate 202 together;

the left copper substrate 201 is placed in a plate placing groove 205 on the left half lamp post 203, the right copper substrate 202 is placed in a plate placing groove 205 on the right half lamp post 204, a tube placing groove 216 on the left half lamp post 203 and a tube placing groove 216 on the right half lamp post 204 are spliced to form a post inner cavity, the heat pipe 3 is placed in the post inner cavity, a bolt 217 penetrates through the left half lamp post 203 and the right half lamp post 204 to be used for splicing the left half lamp post 203 and the right half lamp post 204 together through bolt connection, and the left copper substrate 201, the heat pipe 3 and the right copper substrate 202 which are brazed and connected together are clamped and fixed in the lamp posts by the left half lamp post 203 and the right half lamp post 204 from left and right directions;

the tube placing groove 216 on the left half lamp post 203 extends downwards until the bottom end face of the left half lamp post 203 and the tube placing groove 216 on the right half lamp post 204 extend downwards until the bottom end face of the right half lamp post 204 so as to enable the bottom end of the cavity in the post to be open, and the condensation section 303 of the heat pipe 3 protrudes out of the bottom end opening of the cavity in the post so as to enable the condensation section to be exposed out of the lamp post;

the bottom end of the left half lamp column 203 is welded and fixed on the outer surface of the wall of the heat exchange liquid storage tank 4, and the bottom end of the right half lamp column 204 is welded and fixed on the outer surface of the wall of the heat exchange liquid storage tank 4;

a tube inserting through hole is formed in the wall of the heat exchange liquid storage tank 4, and the condensing section 303 exposed outside the lamp post penetrates through the tube inserting through hole and enters the heat exchange liquid storage tank 4, so that the condensing section 303 of the heat pipe 3 is in direct contact with the cooling liquid in the heat exchange liquid storage tank 4 to generate heat exchange;

the pipe wall of the heat pipe 3 is hermetically welded with the intubation through hole so as to prevent liquid leakage from the intubation through hole;

a liquid inlet 401 for feeding cooling liquid into the heat exchange liquid storage tank 4 is formed in the wall of the heat exchange liquid storage tank 4, and a liquid outlet 402 for discharging the cooling liquid from the heat exchange liquid storage tank 4 is formed in the wall of the heat exchange liquid storage tank 4;

In the present application, according to the above, the car headlight assembly includes several kinds of lights such as headlights (low beam light and high beam light), turn signal light, fog light, daytime running light, and width light, wherein the headlight is a whole set of lights composed of LED headlight bulb, reflecting cup, and the like, the lights are different from the bulb, and the bulb is one of the parts of the lights; the present application focuses on the description of the bulb and is therefore referred to throughout as an LED headlamp bulb, meaning a bulb in an LED headlamp or an LED bulb in an automotive headlamp.

The heat transfer process of an object is divided into three basic heat transfer modes, namely: thermal conduction, convection and radiation; in most cases, the heat transfer efficiency of thermal convection > the heat transfer efficiency of thermal conduction > the heat transfer efficiency of thermal radiation, in comparison with the heat transfer efficiency. For example: the heat transfer process of the dividing wall type heat exchange is as follows: hot fluid transfers heat to the left side of the solid wall (convective heat transfer), then heat from the left side of the wall to the right side of the wall (conductive heat transfer), then heat from the right side of the wall to the cold fluid (convective heat transfer).

In this application, preferably, left LED lamp pearl 101 and right LED lamp pearl 102 are SMD LED.

In the application, the left copper substrate 201 is used for installing and fixing the left LED lamp bead 101 on the left copper substrate and conducting electricity and heat to the left LED lamp bead by using the left copper substrate; the right copper substrate 202 is used for installing and fixing the right LED lamp bead 102 on the right copper substrate and conducting electricity and heat for the right LED lamp bead by utilizing the right copper substrate.

In the application, the lamp post 2 is used for installing and fixing the left LED lamp bead 101, the right LED lamp bead 102, the left copper substrate 201 and the right copper substrate 202 on the lamp post 2; preferably, the lower part of the left half lamp column 203 is in a semi-cylindrical shape and the middle upper part of the left half lamp column 203 is in a long strip-shaped flat plate shape, the left half lamp column 203 comprises a left semi-cylindrical shape and a left long strip-shaped flat plate, the lower part of the right half lamp column 204 is in a semi-cylindrical shape and the middle upper part of the right half lamp column is in a long strip-shaped flat plate shape, and the right half lamp column 204 comprises a right semi-cylindrical shape and a right long strip-shaped flat plate.

In the present application, it is preferable that the circuit layer in the left copper substrate 201 is made of copper foil and the copper base layer in the left copper substrate 201 is made of copper plate, the circuit layer in the right copper substrate 202 is made of copper foil and the copper base layer in the right copper substrate 202 is made of copper plate.

In this application, preferably, the heat pipe 3 has a flattened shape of a flat long bar; preferably, the heat pipe 3 is a red copper heat pipe, and a pipe shell of the heat pipe 3 is made of red copper material; preferably, the heat pipe 3 is a wick type heat pipe, the heat pipe 3 includes a pipe shell 304, a wick (pipe core) 305 and an end cover (end cover) 306, the wick (pipe core) 305 is preferably a sintered powder pipe core, and a liquid medium which is easy to change phase and is used for phase change heat conduction is contained in a cavity in the heat pipe.

In the present application, it is preferable that the condensation section of the heat pipe 3 protrudes from the bottom opening of the cavity in the column so that the condensation section is entirely exposed outside the lamp column.

In the application, the pipe wall of the heat pipe (i.e. the outer surface of the pipe wall of the pipe shell of the heat pipe) is hermetically welded with the insertion pipe through hole so as to prevent liquid leakage from the insertion pipe through hole to the outside.

The brazing process comprises the following steps: when the workpiece and the brazing filler metal are heated to a temperature slightly higher than the melting point of the brazing filler metal, the brazing filler metal is melted (the workpiece is not melted), and is sucked into and filled in gaps among the solid workpieces by virtue of capillary action, the liquid brazing filler metal and the base metal are mutually diffused and dissolved, and a brazed joint is formed after condensation. Brazing is divided into soldering and brazing according to different melting points of brazing filler metals; 1) soldering: the melting point of the solder for soldering is lower than 450 ℃, and the joint strength is lower (less than 70 MPa); 2) brazing: the brazing filler metal of brazing has a melting point higher than 450 ℃ and a joint strength higher than 200 MPa. The brazing flux has the functions of removing oxides and oil contamination impurities on the surfaces of the base metal and the brazing filler metal, protecting the contact surface of the brazing filler metal and the base metal from being oxidized, and increasing the wettability and capillary fluidity of the brazing filler metal. The melting point of the flux should be lower than that of the brazing filler metal, and the corrosion of flux residues to the base metal and the joint should be small. The flux commonly used for soldering is a rosin or zinc chloride solution, and the flux commonly used for brazing is a mixture of borax, boric acid and alkali fluoride.

In the present application, the left long and wide surface of the copper base layer of the left copper substrate is connected with the left long and wide surface of the evaporation section of the heat pipe by brazing, and the left long and wide surface of the copper base layer of the right copper substrate is connected with the right long and wide surface of the evaporation section of the heat pipe by brazing, so as to braze the left copper substrate, the heat pipe and the right copper substrate together; preferably, solder paste is filled between the right long and wide surface of the copper base layer of the left copper substrate 201 and the left long and wide surface of the evaporation section 301 of the heat pipe 3, and then the solder paste is filled between the left long and wide surface of the copper base layer of the right copper substrate 202 and the right long and wide surface of the evaporation section 301 of the heat pipe 3, and then the solder paste is filled between the left long and wide surface of the copper base layer of the right copper substrate 202 and then the solder paste is reflowed to form a solder connection, so that the left copper substrate 201, the heat pipe 3 and the right copper substrate 202 are welded together; here, the solder paste is changed into the solder layer 207 after the soldering process, and thus the solder paste is designed because a minute gap which is difficult to see by naked eyes is formed at the contact surface of the left copper substrate 201 and the heat pipe 3, and the gap causes poor heat conduction, and a minute gap which is difficult to see by naked eyes is formed at the contact surface of the right copper substrate 202 and the heat pipe 3, and the gap causes poor heat conduction, and the solder is melted and sucked into and filled in the minute gap by capillary action, and the liquid solder and the base material are mutually diffused and dissolved to form a soldered joint after being condensed, so that the minute gap is completely filled, and thus the poor heat conduction caused by the minute gap is avoided.

In this application, preferred, at the copper base layer of left copper base plate, the copper base layer of right copper base plate and carry out surface treatment on the surface (copper face) of the needs soldering tin of heat pipe, surface treatment includes hot-blast flattening (tin spraying), organic coating, and the gold of melting, the silver of melting, the tin of melting, chemical nickel plating/immersion gold etc. method has improved the copper base layer of left copper base plate, the copper base layer of right copper base plate and the soldering tin nature and the solderability of the surface (copper face) of heat pipe have avoided the copper base layer of left copper base plate, the copper base layer of right copper base plate and the copper face of heat pipe is by the oxidation, lead to the unable problem of going up tin (soldering tin nature is poor).

the LED headlamp bulb comprises a left LED lamp bead, a right LED lamp bead, a left copper substrate 201, a right copper substrate 202, a lamp post, a heat pipe and a heat exchange liquid storage tank;

Furthermore, in the prior art, the liquid cooling and the heat pipe heat dissipation are used for carrying out double heat dissipation on the LED headlamp bulb under the combined action, but in the prior art, cooling liquid mostly flows in a cooling liquid pipe in a circulating manner, and the heat pipe and the cooling liquid pipe exchange heat in a dividing wall manner, heat of steam in the heat pipe can be transferred to the cooling liquid in the cooling liquid pipe only by penetrating through the pipe wall of the heat pipe and then penetrating through the pipe wall of the cooling liquid pipe, namely the heat in the heat pipe can be transferred to the cooling liquid in the cooling liquid pipe only by penetrating through two layers of pipe walls successively, and the heat transfer efficiency is reduced because a large amount of heat resistance is increased by adding one layer of pipe wall, the heat transfer efficiency between the steam in the heat pipe and the cooling liquid is seriously reduced;

therefore, the condensing section of the heat pipe is directly inserted into the heat exchange liquid storage tank, the pipe wall of the heat pipe is hermetically welded with the inserting pipe through hole to prevent liquid leakage, the condensing section of the heat pipe is directly immersed in the cooling liquid, the condensing section of the heat pipe is directly contacted with the cooling liquid in the heat exchange liquid storage tank, heat of steam in the heat pipe penetrates through the pipe wall of the heat pipe to be transmitted to the cooling liquid, only the layer of pipe wall of the heat pipe is separated between the heat in the heat pipe and the cooling liquid, and compared with the prior art, the heat in the heat pipe penetrates through the two layers of pipe walls, the heat transfer efficiency between the heat pipe and the cooling liquid is improved, and further the heat dissipation effect and the heat dissipation efficiency of an LED lamp bead in an LED headlamp bulb are.

In the prior art, two kinds of headlight bulbs, namely a high beam bulb and a low beam bulb, in an automobile headlight assembly are generally connected and installed in an installation through hole in a shell 8 of the headlight assembly through a buckle of an installation ring 6, so that the headlight assembly is convenient to disassemble and replace, but the high beam bulb and the low beam bulb are not entirely inserted into the installation through hole, generally only the front luminous part is inserted into the installation through hole, and the rear half parts (including a power line and the like) of the high beam bulb and the low beam bulb are not inserted into the installation through hole and still remain outside the installation through hole. Thus, in order to cover the rear half of the high beam bulb and the low beam bulb exposed to the outside in the prior art, a protruding tube (hereinafter, referred to as a protruding tube 11) is further provided on the outer wall surface of the housing 8 of the headlamp assembly, the portion of the high beam bulb and the low beam bulb exposed to the outside is provided in the tube cavity of the protruding tube 11, the portion of the high beam bulb and the low beam bulb exposed to the outside is covered with the protruding tube 11, and then the outside opening of the protruding tube 11 is covered with a dust cover 12 from the outside to prevent dust, water, and the like from entering into the headlamp assembly. Thus, a large lamp chamber 10 is formed in the front of the headlamp assembly, and the lamp chamber 10 includes light emitting points of various lamps such as a high beam lamp, a low beam lamp, a turn signal lamp, and the like; the above-mentioned tube cavity of several small projected tubes 11 is formed on the external wall surface of outer shell 8 in the headlight assembly, and the tube cavity of these several small projected tubes 11 can be used for covering the portion of various bulbs exposed from lamp cavity 10.

When the automobile headlamp assembly works, a light source in the headlamp assembly can generate a large amount of heat while emitting light, the heat is accumulated in a lamp cavity 10 in the headlamp assembly, and the air temperature in the lamp cavity 10 in the headlamp assembly is increased, so that the working temperature of each part (such as a bulb, a lampshade 7, a reflector cup 9 and the like) in the lamp cavity 10 in the headlamp assembly is increased, each part in the lamp cavity 10 in the headlamp assembly works at a high temperature for a long time, the aging is fast, the service life of each part in the lamp cavity 10 in the headlamp assembly is seriously influenced, the temperature in the lamp cavity 10 in the headlamp assembly is high, the fog is easily formed in the lamp cavity 10 of the headlamp assembly, the normal work of the headlamp assembly is seriously influenced, and a large adverse factor is brought to the driving safety;

therefore, how to radiate heat to the LED lamp bead, improve the service life and the service performance of the LED lamp bead, and radiate heat to the lamp cavity 10 in the automobile headlamp assembly, and reduce the air temperature in the lamp cavity 10, so that each component in the lamp cavity 10 in the headlamp assembly works at a more appropriate temperature for a long time, the aging speed is reduced, the service life of each component in the lamp cavity 10 in the headlamp assembly is improved, the fogging in the lamp cavity 10 of the headlamp assembly is avoided, the lighting effect of the automobile headlamp assembly is improved, and the driving safety is improved is a technical problem that needs to be solved urgently by technical personnel in the field;

for this purpose, the present application extends the tube placing groove 216 on the left half lamp column 203 upward to the top end face of the left half lamp column 203 and extends the tube placing groove 216 on the right half lamp column 204 upward to the top end face of the right half lamp column 204 for making the top end of the cavity in the column open, the evaporation section 301 of the heat pipe 3 protrudes from the top end opening of the cavity in the column for making the upper part of the evaporation section exposed outside the lamp column, and the evaporation section 301 of the heat pipe 3 directly contacts with the air in the lamp cavity 10 for heat exchange;

the length of the evaporation section 301 of the heat pipe 3 is 20 mm-50 mm, and the length is long enough, so that a part of the length is used for welding the left copper substrate 201 and the right copper substrate 202, and the other part of the length can be exposed from the cavity in the column into the lamp cavity 10 to absorb the heat of the air in the lamp cavity 10;

here, a part of the evaporation section 301 of the heat pipe 3 absorbs heat of air in the lamp cavity 10, another part of the evaporation section 301 of the heat pipe 3 absorbs heat of the left LED lamp bead 101 and the right LED lamp bead 102, two heat beams heat liquid in the heat pipe 3 into steam, and then the steam moves to the condensation section 303, and since the condensation section 303 of the heat pipe 3 is immersed in the cooling liquid, heat on the condensation section 303 of the heat pipe 3 is transferred to the cooling liquid and taken away by the cooling liquid;

so, this application has realized can dispelling the heat for LED lamp pearl, the life and the performance of LED lamp pearl have been improved, can dispel the heat for lamp cavity 10 in the car headlight assembly again, the air temperature in the lamp cavity 10 has been reduced, make each spare part work under the more suitable temperature for a long time in the lamp cavity 10 in the headlight assembly, the ageing speed has been reduced, the life of each spare part in the lamp cavity 10 in the headlight assembly has been improved, and avoid fogging in the lamp cavity 10 of headlight assembly, the illuminating effect of car assembly headlight has been improved and driving safety has been improved.

In an embodiment of the present application, the length of the evaporation section 301 of the heat pipe 3 is 20mm to 50mm, the length of the portion of the evaporation section 301 of the heat pipe 3 for being soldered to the left copper substrate 201 and the right copper substrate 202 is 10mm to 25mm, the length of the portion of the evaporation section 301 of the heat pipe 3 protruding from the top opening of the cavity in the column is 10mm to 25mm, the length of the heat insulation section 302 of the heat pipe 3 is 40mm to 80mm, and the length of the condensation section 303 of the heat pipe 3 is 20mm to 50 mm.

At present, the heat pipe 3 is widely used for heat dissipation because of the high thermal conductivity of the heat pipe, the heat conduction principle and the rapid heat transfer property of the phase change medium are fully utilized, the heat of the heating object is rapidly transferred out of the heat source through the heat pipe 3, and the thermal conductivity of the heat pipe exceeds the thermal conductivity of any known metal; when the evaporation section 301 of the heat pipe 3 is heated, the liquid in the capillary tube is rapidly vaporized into vapor, the vapor flows to the condensation section 303 under the power of heat diffusion, the vapor releases heat in the condensation section 303 to become liquid, the liquid flows back to the evaporation section 301 along the porous material by virtue of capillary action, and the circulation is not stopped; therefore, the heat pipe can be regarded as a "highway" for transferring heat, the evaporation section 301 of the heat pipe 3 for entering heat corresponds to the entrance of the highway, the condensation section 303 of the heat pipe 3 for exiting heat corresponds to the exit of the highway, and the insulation section 302 of the heat pipe 3 corresponds to the section between the entrance and the exit of the highway;

in the prior art, heat is conducted by using the heat pipe 3, heat mainly enters the heat pipe 3 from the evaporation section 301 of the heat pipe 3, and heat mainly flows out of the heat pipe 3 from the condensation section 303 of the heat pipe 3, but the heat pipe 3 also has a length of heat insulation section 302, and the heat insulation section 302 is in direct contact with air or other parts, so that heat also enters the heat pipe 3 from the heat insulation section 302 and also flows out of the heat pipe 3 from the heat insulation section 302, as if people and vehicles can enter and exit the highway from the entrance and the exit of the highway, or freely enter and exit the highway from the section between the entrance and the exit of the highway, obviously, the heat is unreasonable, and the smoothness of traffic flow, the driving safety and the driving speed on the highway can be seriously influenced by freely entering and exiting the highway from the section between the entrance and the exit of the highway;

as described above, the heat entering and exiting from the heat insulating section 302 becomes a barrier and turbulence like people and vehicles freely entering and exiting from the highway section between the entrance and the exit of the highway, which disturbs the flow of the vapor in the evaporation section 301 toward the condensation section 303, reduces the flow rate and the flow rate of the vapor, disturbs the flow of the liquid in the condensation section 303 toward the evaporation section 301, and reduces the flow rate and the flow rate of the return liquid, that is, the heat exiting from the heat insulating section 302 disturbs the circulation flow of the vapor and the liquid in the heat pipe 3 to a certain extent, and reduces the flow rate and the flow rate of the vapor and the liquid, thereby causing the thermal conductivity of the heat pipe 3 to be significantly reduced;

for this reason, in the present application, a gap is left between the outer surface of the heat pipe and the inner surface of the cavity in the column for avoiding the contact between the outer surface of the heat pipe and the inner surface of the cavity in the column; the heat pipe 3 is sleeved with a heat preservation pipe 5 for heat insulation and heat preservation on the part, which is positioned in the column inner cavity and is not in brazing connection with the left copper substrate 201 and the right copper substrate 202, and the heat preservation pipe 5 is sleeved in the column inner cavity;

a gap is reserved between the outer surface of the heat pipe and the inner surface of the column inner cavity, the gap is used for preventing the outer surface of the heat pipe from contacting with the inner surface of the column inner cavity and preventing heat conduction between the heat pipe and the left half lamp post and the right half lamp post, and the gap is reserved for conveniently sleeving the heat preservation pipe and reserving an installation space for the heat preservation pipe;

the heat insulation section 302 of the heat pipe 3 is completely wrapped by the heat preservation pipe 5, and the heat preservation and heat insulation are carried out on the heat insulation section 302, so that the heat exchange between the heat insulation section 302 of the heat pipe and the outside is avoided, the heat can not enter and exit the heat pipe from the heat insulation section 302, like a guardrail and a peripheral wire netting are arranged on a section between an entrance and an exit of a highway, people and vehicles are blocked by the guardrail and the peripheral wire netting, only people and vehicles are allowed to enter and exit the highway from the entrance and the exit of the highway, the vehicles are smooth from the entrance to the exit and can run at high speed, the interference and influence of entering and exiting the vehicles on a half road can not be caused, the heat preservation pipe is similar to the guardrail and the wire netting on the highway, the heat preservation pipe blocks the heat from entering and exiting the heat pipe from the heat insulation section 302, so that the heat can only enter the heat pipe from the evaporation section 301, therefore, the steam of the evaporation section 301 flows to the condensation section 303 at a high speed without interference, the flow speed and the flow of the steam are improved, the liquid of the condensation section 303 flows to the evaporation section 301 at a high speed without interference, and the flow speed and the flow of the backflow liquid are improved, namely the heat insulation section 302 does not interfere with the circulation flow of the steam and the liquid in the heat pipe any more, so that the flow speed and the flow of the steam and the liquid are improved, and the heat conductivity of the heat pipe is improved;

the insulating tube 5 is made of a prior art insulating material, preferably a foam insulating material.

In the application, the LED headlamp bulb in the LED headlamp bulb system with dual heat dissipation of liquid cooling and heat pipe further comprises a mounting ring 6 for mounting and fixing the LED headlamp bulb in a mounting through hole on a housing 8 of an automobile headlamp assembly;

the mounting ring 6 in the present application is called as a chuck, a buckle or a snap ring in the prior art, and like the prior art, the mounting ring 6 in the present application is also detachably and fixedly arranged in a mounting through hole on a housing 8 of the headlamp assembly of the automobile through a detachable connection manner such as a buckle connection, the mounting ring 6 and the mounting through hole are detachably connected such as a buckle connection, and the mounting ring 6 is fixed in the mounting through hole and does not rotate and does not move in the vertical direction;

the structure of the mounting ring 6 in the application is the same as that of the mounting ring 6 in the prior art, so that the LED headlight bulb provided by the application is a universal headlight bulb, is suitable for most automobile models, can be replaced on the existing automobiles in an original position and without damage, and is matched with the mounting ring for use, the lower part of the lamp post 2 is designed into a cylindrical shape, the lower part of the left half lamp post is designed into a semi-cylindrical shape, the lower part of the right half lamp post is designed into a semi-cylindrical shape, and the lower part of the semi-cylindrical shape of the left half lamp post and the lower part of the semi-cylindrical shape of the right half lamp post are spliced into a cylinder;

like prior art, collar 6 in this application can be established on the lower part of the cylindrical shape of lamp pole 2 through the buckle adapter sleeve, is the buckle connection between collar and the lamp pole 2 of LED headlight bulb: when the outer cylindrical surface of the cylindrical lower part of the lamp post is a smooth surface without a boss (as shown in figure 5), a wedge-shaped bulge is arranged on the inner diameter surface of the mounting ring matched with the wedge-shaped bulge, the wedge-shaped bulge extrudes the outer cylindrical surface of the cylindrical lower part of the lamp post, and the wedge-shaped bulge is utilized to insert, extrude and clamp the lamp post 2 in the mounting ring 6; when the outer cylindrical surface of the cylindrical lower part of the lamp post is provided with the boss, the inner diameter surface of the mounting ring matched with the boss is provided with the groove, and the lamp post 2 is inserted, buckled and fixed in the mounting ring 6 by utilizing the matching of the boss and the groove;

the mounting ring 6 in the application can also be sleeved and fixed on the lower part of the cylindrical shape of the lamp post through a set screw (jackscrew);

when the LED headlamp bulb is installed, the installation ring 6 is taken down from the LED headlamp bulb, then the installation ring 6 is arranged in an installation through hole in a shell 8 of the automobile headlamp assembly in a buckling connection mode, then the lamp post 2 of the LED headlamp bulb is screwed, inserted and fixed in the installation ring 6, and the lamp post is fixed in the installation ring 6 and does not rotate or move in the vertical direction;

the specific structure and model of the mounting ring are not limited in the present application, and the mounting ring known to those skilled in the art may be adopted, which is not described herein again.

In one embodiment of the present application, the left LED lamp bead 101 is exposed from a rectangular through hole 213 on the bottom wall of the board placing groove 205 on the left half lamp pole 203;

and the right LED lamp bead 102 is exposed from a rectangular through hole 213 on the bottom wall of the board placing groove 205 on the right half lamp post 204.

In an embodiment of the application, the liquid-cooled and heat pipe dual-heat-radiation LED headlamp bulb system further includes a driving power supply circuit board for providing direct current to the left LED lamp bead and the right LED lamp bead;

a threading groove 206 for accommodating the concealed wires is further arranged on the bottom surface of the inner groove at the middle lower part of the pipe placing groove 216, and the plate placing groove 205 is communicated with the threading groove 206;

a first positive wire 209 and a first negative wire 210 for supplying power to the left LED lamp bead 101 enter the threading groove 206 on the left half lamp column 203 from the through hole 214 at the lower part of the left half lamp column 203, and then the first positive wire 209 and the first negative wire 210 pass through the threading groove 206 on the left half lamp column 203 and are finally electrically connected with the positive electrode and the negative electrode on the left copper substrate 201 respectively;

a second positive electric wire 211 and a second negative electric wire 212 for supplying power to the right LED lamp bead 102 enter the threading groove 206 on the right half lamp post 204 from the through hole 215 at the lower part of the right half lamp post 204, and then the second positive electric wire 211 and the second negative electric wire 212 pass through the threading groove 206 on the right half lamp post 204 and are finally electrically connected with the positive electrode and the negative electrode on the right copper substrate 202 respectively;

the left LED lamp bead 101 is electrically connected with the driving power supply circuit board, and the right LED lamp bead 102 is electrically connected with the driving power supply circuit board.

In this application, it is preferable that the plate placing groove 205 and the threading groove 206 are sequentially arranged on the bottom surface of the inner groove of the tube placing groove 216 from top to bottom, the plate placing groove is located at the upper top of the tube placing groove, and the threading groove extends from the lower bottom end of the plate placing groove to the bottom end surface of the corresponding left half lamppost or the bottom end surface of the corresponding right half lamppost.

In one embodiment of the present application, the left half lamp column 203, the right half lamp column 204 and the heat exchange liquid storage tank 4 are made of an aluminum alloy material.

The application provides an automobile headlamp assembly, which comprises a lampshade 7 positioned on the front side, a shell 8 positioned on the back side and a reflecting cup 9 used for reflecting light, wherein the lampshade 7 and the shell 8 are in sealed connection to enclose a lamp cavity 10 in the automobile headlamp assembly, a protruding tube 11 is arranged on the outer wall surface of the shell 8, the outer opening of the protruding tube 11 is covered by a dustproof cover 12, and the LED headlamp bulb system with double heat dissipation of liquid cooling and heat pipes in any one of the liquid cooling and heat pipe systems is further included;

the LED headlamp bulb is inserted and fixed in a mounting through hole in a shell 8 of the automobile headlamp assembly through a mounting ring 6, the part of the LED headlamp bulb exposed out of a lamp cavity 10 is concealed in a tube cavity of a convex tube 11, and the convex tube 11 covers and wraps the part of the LED headlamp bulb exposed out of the lamp cavity 10;

the cooling liquid circulating pump, the cooling liquid tank, the water cooling row and the cooling fan are all positioned outside the lamp cavity and outside the tube cavity of the raised tube 11, and the cooling liquid tube penetrates through the bottom wall of the dustproof cover;

the intercommunication the inlet of heat transfer liquid reserve tank with the coolant liquid pipe of the liquid outlet of coolant liquid circulating pump pierces through the bottom surface wall of shield, the intercommunication the liquid outlet of heat transfer liquid reserve tank with the coolant liquid pipe of the inlet of water-cooling row pierces through the bottom surface wall of shield, and is specific: the cooling liquid pipe passes through the through hole 1201 on the bottom wall of the dust cover, and the gap between the cooling liquid pipe and the through hole 1201 on the bottom wall of the dust cover needs to be sealed, dustproof and waterproof.

Methods and devices not described in detail in the present invention are all the prior art and are not described in detail.

The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The LED headlamp bulb system with double heat dissipation of liquid cooling and heat pipes is characterized by comprising an LED headlamp bulb, a cooling liquid circulating pump, a cooling liquid pipe for conveying cooling liquid, a cooling liquid box for storing the cooling liquid, a heat dissipation fan and a water cooling row for dissipating heat of the cooling liquid;

the lamp post comprises a left half lamp post and a right half lamp post;

2. The LED headlamp bulb system with dual liquid cooling and heat pipe heat dissipation function as claimed in claim 1, wherein the tube placing groove on the left half lamp post extends upward to the top end face of the left half lamp post and the tube placing groove on the right half lamp post extends upward to the top end face of the right half lamp post for making the top end of the cavity in the post open, the evaporation section of the heat pipe protrudes from the top end opening of the cavity in the post for making the upper part of the evaporation section exposed outside the lamp post, and the evaporation section of the heat pipe is in direct contact with the air in the lamp cavity for heat exchange.

3. The LED headlamp bulb system with the double heat dissipation of liquid cooling and heat pipe as claimed in claim 2, wherein the length of the evaporation section of the heat pipe is 20mm to 50mm, the length of the part of the evaporation section of the heat pipe for brazing connection with the left copper substrate and the right copper substrate is 10mm to 25mm, the length of the part of the evaporation section of the heat pipe protruding from the top opening of the cavity in the column is 10mm to 25mm, the length of the heat insulation section of the heat pipe is 40mm to 80mm, and the length of the condensation section of the heat pipe is 20mm to 50 mm.

4. The LED headlamp bulb system with double heat dissipation of liquid cooling and heat pipes as claimed in claim 1 or 2, wherein a gap is left between the outer surface of the heat pipe and the inner surface of the cavity in the column for avoiding the contact between the outer surface of the heat pipe and the inner surface of the cavity in the column;

5. The LED headlamp bulb system with dual heat dissipation of liquid cooling and heat pipe as claimed in claim 1, wherein the left LED lamp bead is exposed from a rectangular through hole on the bottom wall of the plate placing groove on the left half lamp post;

6. The LED headlamp bulb system with the dual heat dissipation of liquid cooling and heat pipe as claimed in claim 1, further comprising a driving power circuit board for providing direct current to the left LED lamp bead and the right LED lamp bead;

7. The LED headlamp bulb system with dual heat dissipation of liquid cooling and heat pipe as claimed in claim 1, wherein the left half lamp post, the right half lamp post and the heat exchange liquid storage tank are made of aluminum alloy.