TWI633268B - Three-dimensional three-dimensional uniform temperature plate, preparation method thereof and automobile headlight - Google Patents

Abstract

The invention relates to the technical field of vehicle lights, in particular to a three-dimensional three-dimensional temperature-equalizing plate, a method for preparing the same, and a car headlight. The cavity and the condensing cavity are arranged vertically to form a three-dimensional structure with a T-shaped cross section. The inner walls of the evaporation cavity and the condensing cavity are both provided with a capillary core layer. The automobile headlight includes an LED-COB light source, a bulb metal cover, a finned radiator, a fan, and the three-dimensional three-dimensional temperature equalization board; the LED-COB light source is attached to the outer surface of the evaporation cavity; the front end of the finned radiator is attached The fan is arranged on the outer surface of the condensing cavity; the fan is arranged at the rear end of the finned radiator; the metal outer cover of the bulb is sleeved outside the LED-COB light source and the three-dimensional isothermal plate. The invention enlarges the installation area and the heat radiation area, can use the space more effectively; shortens the circulation flow of the cooling liquid, enlarges the contact area, and improves the heat radiation efficiency.

Description

Three-dimensional three-dimensional uniform temperature plate, preparation method thereof and automobile headlight

The invention relates to the technical field of vehicle lights, in particular to a three-dimensional three-dimensional temperature-equalizing plate, a preparation method thereof, and an automobile headlight.

Vapor Chamber has the advantages of high thermal conductivity, high thermal conductivity, light weight, simple structure, and multi-purpose. It can transfer a large amount of heat without consuming power. At present, it has been widely used in the heat conduction of electronic components. In this way, the heat-generating components (such as electronic components, LED chips, etc.) are quickly conducted away from the heat to effectively solve the heat accumulation phenomenon of the heat-generating components.

However, due to the limitation of the use space of the existing temperature equalizing plate, the area of the heat dissipation part is small, which affects the size of the heat dissipation device, the heat dissipation method and installation, resulting in low heat dissipation efficiency.

The object of the present invention is to provide a three-dimensional three-dimensional temperature-equalizing plate, a method for preparing the same, and an automobile headlight, so as to solve the technical problems of small heat dissipation area and difficult installation of the heat sink in the prior art.

The invention provides a three-dimensional three-dimensional isothermal plate, which comprises a hollow long plate-shaped evaporation cavity and a hollow flat plate-shaped condensation cavity.

The evaporation chamber and the condensation chamber are vertically arranged to form a three-dimensional structure with a cross-section in a T-shape, and the evaporation chamber and the condensation chamber are both vacuum chambers and filled with a cooling liquid, and the two communicate with each other; the evaporation chamber and the condensation chamber Set inside walls Capillary core.

Further, the evaporation cavity is rectangular, and the condensation cavity is circular; and the thickness of the condensation cavity is greater than the thickness of the evaporation cavity.

Further, the evaporation cavity and the condensation cavity are made of red copper or aluminum, and the capillary core layer is made of copper or aluminum.

Further, the material of the cooling liquid is water.

Further, the thickness of the capillary core layer is 0.1 mm to 100 mm, and the porosity ratio is 50%.

The invention also provides a method for preparing the three-dimensional three-dimensional isothermal plate, which includes the following steps.

A shell of the condensation chamber is prepared, and the inner surface of the shell of the condensation chamber is covered with copper powder or aluminum powder particles, or covered with a copper wire mesh or an aluminum wire mesh, and sintered to form a capillary core layer having a capillary action.

The shell of the evaporation chamber is prepared.

Cut oxygen-free copper pipe or aluminum-free pipe into sections according to the design length to obtain the pipe fittings, and insert the central steel rod to form a gap of a predetermined thickness between the central steel rod and the pipe wall, and fill the gap with pressed copper powder Particles or aluminum powder particles, and then sintered to form a capillary core layer; one end of the sintered capillary core layer is closed into a cone shape and welded and sealed; oxygen reduction treatment is performed, and the other end is vacuum-squeezed and sealed to seal It is sealed and then extruded into a flat shape and cut into a fixed size to obtain the shell of the evaporation chamber.

Alternatively, the inner surfaces of the two stamped and formed oxygen-free copper shells or oxygen-free aluminum shells are respectively pressed and covered with copper powder particles or aluminum powder particles, or copper wire mesh or aluminum wire mesh is pressed and sintered to form a capillary core layer; Place two pieces of shell in the atmosphere The shell of the evaporation chamber is obtained by performing pressure welding or metal solder welding in a protected environment.

Connect the inner capillary core layer of the shell of the condensation chamber to the shell of the evaporation chamber; weld the connections in an atmosphere-protected environment; insert a copper or aluminum pipe into the hole reserved in the condensation chamber to perform welding and reduction Oxygen to form an aspirated fluid injection joint.

Coolant is injected into the condensing chamber and the evaporation chamber from the gas-injection and liquid-injection joint and evacuated. After the vacuum is evacuated, the bending seal is squeezed, and the fusion seal is performed to obtain a three-dimensional isothermal plate.

Optionally, during the sintering process of the capillary core layer, the sintering temperature of the copper powder particles and the copper wire mesh is 800 ° C. to 1050 ° C., and the sintering time is 1 hour to 6 hours.

Optionally, during the sintering process of the capillary core layer, the sintering temperature of the copper wire mesh and the aluminum wire mesh is 400 ° C. to 550 ° C., and the sintering time is 1 hour to 6 hours.

Optionally, the diameter of the copper powder particles or aluminum powder particles is 10 μm to 1000 μm, and the covering thickness is 0.1 mm to 100 mm.

The invention also provides an automobile headlight, comprising: an LED-COB light source, a bulb metal cover, a fin radiator, a fan, and the three-dimensional three-dimensional isothermal plate according to any one of claims 1 to 4.

The LED-COB light source is attached on the outer surface of the evaporation cavity, and is used to transfer heat generated by the LED-COB light source to the evaporation cavity of the three-dimensional three-dimensional temperature equalization plate.

The front end of the finned radiator is attached to the outer surface of the condensation cavity, and cools the condensation cavity of the three-dimensional three-dimensional isothermal plate.

The fan is arranged at the rear end of the finned radiator to accelerate the cooling of the finned radiator.

The metal outer cover of the bulb is sleeved outside the LED-COB light source and the three-dimensional three-dimensional isothermal plate, and the metal outer cover of the bulb is made of magnesium alloy material.

Further, there are two groups of LED-COB light sources, which are respectively attached to the upper and lower surfaces of the evaporation cavity; and the total thickness of the LED-COB light source and the evaporation cavity does not exceed 3 mm.

Further, the finned heat sink has a circular structure, and a 180 ° parallel air duct is arranged on the outside.

Further, it further comprises a fixing frame and a power-on adapter plate; the fixing frame and the power-on adapter plate are stacked together and arranged between the fin radiator and the fan; the power-on adapter plate supplies power to the fan and the LED-COB light source .

Further, the fan is connected to the fixing frame and the power-on adapter plate by screws.

Further, it also includes a quartz glass protective tube which is sheathed outside the metal outer cover of the bulb.

Further, the metal outer cover of the light bulb is provided with a clamping slot, a socket and a clamping plate, which are connected with various types of vehicle lamp assembly shells.

Further, it further comprises a fan fixing frame and a fan mounting frame, the fan is fixed on the fan fixing frame, and the fan fixing frame is mounted on the rear end of the fin radiator through the fan mounting frame.

Further, one end of the LED-COB light source is flush with the blind end of the evaporation cavity.

Further, a power distribution box is further included; the power distribution box is respectively connected with the power distribution box; The LED-COB light source is electrically connected to the fan.

Compared with the prior art, the beneficial effects of the present invention are as follows.

The invention enlarges the installation area and the heat radiation area, can use the space more effectively; shortens the circulation flow of the cooling liquid, and enlarges the contact area, thereby improving the heat radiation efficiency and the heat radiation effect is better.

1‧‧‧LED-COB light source

2‧‧‧ Bulb Metal Cover

3‧‧‧Three-dimensional Stereo

4‧‧‧ Finned Radiator

5‧‧‧fan

6‧‧‧ fixed frame

7‧‧‧ power adapter board

8‧‧‧Quartz glass protective tube

21‧‧‧Socket

22‧‧‧Card Slot

23‧‧‧card board

101‧‧‧ evaporation end

102‧‧‧Condensing end

103‧‧‧ evaporation chamber

104‧‧‧Condensation chamber

105‧‧‧ Capillary core layer

106‧‧‧shell

107‧‧‧Gas phase coolant

108‧‧‧ liquid coolant

109‧‧‧fan holder

110‧‧‧fan mounting bracket

111‧‧‧Wire cover

112‧‧‧ Distribution box

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the specific embodiments or the previous technical description will be briefly introduced below. Obviously, the drawings in the following description are According to some embodiments of the present invention, for those of ordinary skill in the art, other drawings can be obtained according to these drawings without paying creative labor.

FIG. 1 is a schematic diagram of a three-dimensional structure of a three-dimensional three-dimensional temperature equalizing plate according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a three-dimensional three-dimensional temperature-equalizing plate provided by an embodiment of the present invention.

FIG. 3 is an assembly diagram of an automobile headlight according to an embodiment of the present invention.

FIG. 4 is an exploded view of the automobile headlight in FIG. 3.

FIG. 5 is an exploded view of a second modified structure of a car headlight according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of the LED-COB light source and the three-dimensional three-dimensional isothermal body installed together in a second variant structure of a car headlight.

FIG. 7 is a schematic diagram of a fourth modified structure of an automobile headlight according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of a fifth modified structure of a car headlight according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of a sixth modified structure of a car headlight according to an embodiment of the present invention.

FIG. 10 is a schematic diagram of a seventh modified structure of an automobile headlight according to an embodiment of the present invention.

FIG. 11 is a schematic diagram of an eighth modified structure of an automobile headlight according to an embodiment of the present invention.

FIG. 12 is a schematic diagram of a ninth modified structure of a car headlight according to an embodiment of the present invention.

FIG. 13 is a schematic diagram of a tenth modified structure of an automobile headlight according to an embodiment of the present invention.

FIG. 14 is a schematic diagram of an eleventh modified structure of an automobile headlight according to an embodiment of the present invention.

FIG. 15 is a schematic diagram of a twelfth modified structure of an automobile headlight according to an embodiment of the present invention.

FIG. 16 is a schematic diagram of a thirteenth modified structure of a car headlight according to an embodiment of the present invention.

FIG. 17 is a schematic diagram of a fourteenth modified structure of a car headlight according to an embodiment of the present invention.

The technical solution of the present invention will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are a part of the present invention, but not all the embodiments. Based on the embodiments of the present invention, All other embodiments obtained by a person skilled in the art without making creative work fall into the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and other indications The azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed with a specific orientation And operation, therefore cannot be understood as a limitation to the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only, and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" should be understood in a broad sense unless otherwise specified and limited. For example, they may be fixed connections or removable. Connected or integrated; it can be mechanical or electrical; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Referring to FIG. 1 and FIG. 2, an embodiment of the present invention provides a three-dimensional three-dimensional isothermal plate including a rectangular evaporation end 101 and a circular plate-shaped condensing end 102, which are perpendicular to each other to form a T-shaped three-dimensional structure.

Referring to FIG. 2, specifically, the three-dimensional three-dimensional isothermal plate includes a hollow long plate-shaped evaporation end 101 and a hollow circular plate-shaped condensation end 102. The evaporation end 101 is fixed at the center of the upper surface of the condensation end 102 in a vertical manner, so as to form a three-dimensional structure with a T-shaped cross section. Hollow cavity of evaporation end 101 The evaporation cavity 103 is formed, and the hollow cavity of the condensing end 102 constitutes the condensation cavity 104, and the evaporation cavity 103 and the condensation cavity 104 are both vacuum chambers, and the two communicate with each other. The evaporation chamber 103 and the condensation chamber 104 are filled with a cooling liquid. The inner walls of the evaporation chamber 103 and the condensation chamber 104 are all covered with a capillary core layer 105, and a shell 106 is provided on the outer wall thereof.

As shown in FIG. 2, the phase change heat dissipation method and the principle of capillary structure transmission are adopted in the three-dimensional isothermal plate: the cooling liquid is absorbed in the capillary core layer 105; when the evaporation end 101 absorbs the heat emitted by the heat source, the evaporation end 101 The cooling liquid in the capillary core layer 105 absorbs heat and vaporizes, and the gas phase cooling liquid 107 overflows from the capillary core layer 105, flows along the evaporation cavity 103 toward the condensation cavity 104, and exotherms in the condensation cavity 104 to condense and liquefy. The cooling liquid 108 is sucked into the capillary core layer 105 of the condensing end 102, and is then transferred to the capillary core layer of the evaporation end 101 through the capillary action of the capillary core layer 105, thereby completing a heat dissipation cooling cycle.

The T-shaped three-dimensional three-dimensional temperature equalizing plate can increase the contact area between the evaporation end and the condensing end, thereby enabling more effective contact between the temperature equalizing radiator and the heat source and the heat dissipation component, and easier installation with the heat source and other radiator components And, the heat absorption and heat dissipation effect is better; at the same time, the flow of the cooling liquid is shorter and the circulation speed is faster; the structure is more stable and the shockproof effect is good.

In an optional solution of this embodiment, the thickness (diameter size) of the condensation cavity 104 is larger than the thickness (diameter size) of the evaporation cavity 103. In this way, the condensation chamber 104 is larger and the evaporation chamber 103 is smaller, a pressure difference can be formed between the condensation chamber 104 and the evaporation chamber 103, so that the flow rate of the gas-phase cooling liquid 107 can be accelerated, and the circulation speed and heat dissipation efficiency can be increased.

In an optional solution of this embodiment, the three-dimensional three-dimensional isothermal plate is made of red copper or aluminum material with low thermal resistance from the inside to the outside (including the capillary core layer 105 and the shell 106), which can further improve its heat dissipation performance.

In an optional solution of this embodiment, the evaporation cavity 103 of the three-dimensional three-dimensional isothermal plate may be divided into a plurality of channels by the capillary core layer 105, so that the gas-phase cooling liquid 107 flows in each channel to increase the flow speed. At the same time, if the phase transition efficiency on both sides of the evaporation end 101 of the temperature-radiating body is uneven, the capillary core layer 105 constituting the channel can be used for adjustment.

In an alternative solution of this embodiment, the cooling liquid is water. Of course, the coolant can also use other substances with gas-liquid two-phase phase transition properties, such as ethanol, acetone, etc., which can be selected according to the heating temperature of the heat source and the phase transition temperature of the phase change material.

In an optional solution of this embodiment, the capillary core layer 105 is sintered by copper powder particles, the thickness of the single-sided capillary core layer 105 is 0.1 mm to 100 mm, and the porosity is 50%.

In order to ensure the gas-liquid circulation process of the cooling liquid and accelerate the heat conduction efficiency, the evaporation cavity 103 and the condensation cavity 104 should maintain a proper thickness.

In an optional solution of this embodiment, the three-dimensional three-dimensional temperature-equalizing plate may also be set to other shapes, so as to facilitate cooperation with a heat source, a heat dissipation component, and an installation space. For example, the evaporation end has various shapes such as a hollow long plate shape, a hollow circular plate shape, a hollow curved plate shape, and a hollow polygonal plate shape. Correspondingly, the condensing end may also be a hollow long plate shape, a hollow circular plate shape, or a hollow curved plate shape. And hollow polygonal shapes. The evaporation end and the condensing end are not limited to vertical installation or linear connection, and an inclined connection can be used as long as the evaporation chamber and the condensation can be made. The cavity can be connected.

The three-dimensional three-dimensional isothermal plate can be widely used for heat dissipation of LED-COB light sources or electronic products according to different design shapes.

The embodiment of the present invention also provides a method for preparing a three-dimensional three-dimensional isothermal plate, which is specifically prepared according to the following steps.

Preparation of condensation chamber:

The shell of the condensation chamber is an oxygen-free copper shell or an oxygen-free aluminum shell that is stamped and formed according to the size specifications of the upper and lower parts; the upper shell is punched to form a certain shape and shape according to the shape and size of the evaporation chamber. Size holes for connection with the evaporation chamber; a certain size of reserved holes and interconnected contact welding edges are stamped on the bottom or upper shell according to the design requirements, and are used to weld copper or aluminum pipes to form air extraction Filling connector.

Press the copper powder particles or aluminum powder particles or copper wire mesh or aluminum wire mesh on the inner surface of the upper and lower shells according to the required thickness, and sinter at high temperature according to the specific requirements of the product to form a capillary core that stores the conductive liquid. Floor.

Preparation of evaporation chamber:

The evaporation cavity is prepared by processing oxygen-free copper tube or oxygen-free aluminum tube, or by connecting two parts according to the stamped and formed oxygen-free copper shell or oxygen-free aluminum shell.

Specifically, when using an oxygen-free copper tube or an oxygen-free aluminum tube to prepare an evaporation cavity, first select an oxygen-free copper tube or an oxygen-free aluminum tube of a certain diameter and wall thickness according to the specific product requirements, and then cut into a copper tube of a specified length or Aluminum tube; the bottom of the copper tube or aluminum tube is fixed in the graphite fixture according to the height requirements; the conductive liquid is stored according to the storage The design value of the thickness of the capillary core layer of the body. A central steel rod is inserted inside the copper or aluminum tube, and then the gap between the central steel rod and the copper tube or the inner wall of the central steel rod and the aluminum tube is filled with pressed oxygen-free copper. Powder or oxygen-free aluminum powder; then the copper tube or aluminum tube pressed and filled with oxygen-free copper powder or oxygen-free aluminum powder is moved into a high-temperature sintering furnace, and the sintering temperature and time are based on different requirements of the metal tube and the capillary core layer Make a determination; close one end of the sintered copper tube or aluminum tube into a cone shape, and perform welding and sealing by a welding machine; then put the sealed end into a high-temperature furnace and perform high-temperature oxygen reduction treatment to remove the The oxide layer is removed and oxygen is exhausted; after the vacuum is drawn from the other end, the other end is also closed and welded and sealed. Finally, in a negative pressure vacuum environment, the copper pipe or aluminum pipe is extruded into the extrusion equipment according to the product requirements. A flat evaporation chamber with a certain height, thickness and shape.

Alternatively, first prepare two pieces of oxygen-free copper or aluminum-free aluminum shells with a certain size and thickness and press forming, and then press and cover the copper powder or aluminum powder particles on the inner surface of the two shells according to the designed thickness, or Press the copper wire mesh and aluminum wire mesh with a certain specification thickness and sinter at high temperature according to the specific requirements of the product to form a capillary core layer capable of storing the conductive liquid; after sintering the two shells with the capillary core layer, Metal copper or aluminum solder paste is printed on the connection surface, butt jointed and placed in the fixture, then place the two pieces of the shell in a tunnel atmosphere welding furnace to perform atmosphere protection welding according to requirements, or place the two pieces of shell in a vacuum High-temperature pressure welding in an atmosphere-protected furnace.

Connect the evaporation chamber and the condensation chamber to form a connection body:

Put both into a graphite fixture, press and fill a certain particle diameter And the copper powder particles or aluminum powder particles of a thickness, or a certain thickness of copper wire mesh or aluminum wire mesh, the capillary core layer of the evaporation cavity and the capillary core layer of the condensation cavity are connected; then the two are placed in a high-temperature welding furnace Sintering is performed to complete the connection between the evaporation cavity and the upper shell of the condensation cavity.

Alternatively, the capillary core layer of the evaporation chamber and the capillary core layer of the condensation chamber are first connected, and then the shell of the evaporation chamber and the shell of the condensation chamber are placed on a copper pillar or an aluminum pillar for support, and on both Apply metal solder paste to the contact surfaces of the two, print and apply metal copper solder paste to the contact surfaces of the two, butt them and place them in the fixture; fix the shell of the evaporation chamber and the shell of the condensation chamber that are fixed together. Go to a tunnel atmosphere welding furnace for atmosphere welding.

Alternatively, the capillary core layer of the evaporation chamber and the capillary core layer of the condensation chamber are connected first, and then the shell of the evaporation chamber and the upper shell of the shell of the condensation chamber are placed in a fixture, and a certain shape of solder is placed at the external connection Copper or aluminum ring, connection welding by high frequency argon arc welding.

Fill with coolant and seal:

Insert a copper pipe or aluminum pipe of a certain diameter into a reserved hole for welding a copper pipe or an aluminum pipe on the bottom or upper shell of the shell of the condensation chamber, and then place a copper ring and aluminum ring solder on the outside. The joint welding is performed on an argon arc welding machine. After welding, high-temperature reduction and deoxidation are performed to form an air-injection liquid injection joint; then, a cooling liquid is injected from the air-injection liquid injection joint, a vacuum is squeezed to bend the seal, and an injection hole is injected. It was sintered and sealed on an argon arc welding machine to obtain a three-dimensional isothermal plate.

During the sintering of the capillary core layer, the copper powder particles and the copper mesh are sintered. The temperature is 800 ° C ~ 1050 ° C, and the sintering time is 1 hour ~ 6 hours. The sintering temperature of copper wire mesh and aluminum wire mesh is 400 ° C ~ 550 ° C, and the sintering time is 1 hour ~ 6 hours.

In the process of atmosphere protection, the atmosphere protection gradually decreases from 1050 ° to 80 °, and the time is 5 minutes to 30 minutes.

The diameter of the copper powder particles or aluminum powder particles is 10 micrometers to 1000 micrometers, and the covering thickness is 0.1 millimeters to 100 millimeters.

The three-dimensional three-dimensional temperature equalizing plate realizes condensation and heat dissipation from a vertical three-dimensional surface to another three-dimensional surface in a very small three-dimensional space. The three-dimensional isothermal plate technology is similar to a heat pipe in principle, but differs in the way of conduction: the heat pipe is a one-dimensional linear heat conduction, and the heat in the three-dimensional isothermal plate is conducted on a three-dimensional surface, so higher efficiency. The evaporation chamber is heated on both sides. The heat source heats the evaporation chamber to absorb heat. The cooling liquid (pure water or refrigerant) is heated under the vacuum ultra-low pressure environment to quickly evaporate into hot air (<104Tor or less). The endothermic Vapor Chamber adopts a vacuum design and the hot air is evaporating. The heat is rapidly conducted in the cavity, and the hot air rises to the condensing cavity. The condensing cavity is welded with radiating fins. The heat is transferred to the radiating fins and recondenses into a liquid. The condensed cooling liquid flows back into the three-dimensional volume through the copper microstructure capillary channel. The superconducting homogeneous body forms a reflux at the evaporation cavity. The refluxed cooling liquid is vaporized again after being heated by the evaporation cavity and absorbs heat, conducts heat, and dissipates heat through the condensing wall. Repeatedly, the space can be used more effectively; an internal circulation process is formed. , The contact area is enlarged, thereby improving the heat dissipation efficiency and the heat dissipation effect is better.

In an optional solution of this embodiment, the method for preparing the three-dimensional three-dimensional isothermal plate may further include the following steps.

The prepared shell is placed in an ultrasonic cleaning tank to ultrasonically clean each surface of the shell to remove oil and impurities attached to the surface during the production process of the workpiece.

Before the coolant is injected, the welded shell is placed in water, and compressed air is injected through the reserved hole to perform an air tightness test.

After the three-dimensional three-dimensional isothermal plate is prepared, a plastic jig is used to correct the deformation of the three-dimensional three-dimensional isothermal plate in the production process, and the appearance is repaired.

The prepared three-dimensional three-dimensional isothermal plate is placed in a constant temperature box, and a high-temperature airflow is passed to perform a high-temperature environment aging test.

The evaporation end of the prepared three-dimensional three-dimensional isothermal plate is heated, and a temperature test is performed on the condensation end to detect the thermal conductivity of the product.

The surface of the three-dimensional three-dimensional isothermal plate is subjected to a surface treatment including a sand blasting process treatment and an electroplating process treatment to improve the surface strength and anti-corrosion performance, while making the product more beautiful.

It should be noted that, in the method for preparing the planar three-dimensional three-dimensional isothermal plate mentioned in this embodiment, the atmosphere protection is nitrogen protection; during the nitrogen protection process, the nitrogen protection is gradually decreased from 1050 ° to 80 °, and the time is 5 minutes to 30 minutes.

Referring to FIGS. 3 to 17, an embodiment of the present invention further provides an automobile headlight, which includes an LED-COB light source 1, a three-dimensional three-dimensional isothermal plate 3, a metal bulb cover 2, a fin radiator 4, and a fan 5. There are two LED-COB light sources 1, which are respectively attached to the two surfaces of the evaporation end 101 of the three-dimensional three-dimensional isothermal plate 3, that is, the LED-COB light sources are attached to the outer surface of the evaporation cavity for The heat generated by the LED-COB light source is transferred to the three-dimensional Inside the evaporation chamber of the temperature plate; the metal outer cover 2 of the bulb is divided into two parts, left and right, and is set outside the LED-COB light source 1 and the three-dimensional three-dimensional temperature equalization plate 3. The fan is arranged at the rear end of the finned radiator to speed up the cooling of the finned radiator; the side seams of the two metal shells 2 of the bulbs are connected to each other, and the bottom end is connected to the outer wall of the condensation end 102 of the three-dimensional three-dimensional isothermal plate 3, which is combined. As a whole, the metal cover of the bulb is made of magnesium alloy.

In an optional solution of this embodiment, the total thickness of the two LED-COB light sources 1 and the evaporation end 101 does not exceed 3 mm. Generally, according to the design standard, the total thickness of the two LED-COB light sources 1 and the evaporation end 101 may be equal to the tungsten wire length of the halogen lamp or the arc length of the HID lamp, for example, it may be 2mm or 1.2mm. Therefore, under the premise of ensuring the heat dissipation effect, the automobile headlight can meet the precise focusing of the X-axis, Y-axis, and Z-axis of each model of the free-form surface of each model of the headlight assembly, and has a good light type.

As shown in FIG. 3, in an alternative solution of this embodiment, the finned radiator 4 has a circular structure, and the front end thereof is closely attached to the lower surface of the condensation end 102 of the three-dimensional three-dimensional isothermal plate 3, so that the three-dimensional three-dimensional The condensation end 102 of the temperature equalizing plate 3 performs heat dissipation and cooling, that is, the front end of the finned radiator is attached to the outer surface of the condensation cavity, and the condensation cavity of the three-dimensional three-dimensional temperature equalizing plate is cooled.

As shown in FIG. 4, in an alternative solution of this embodiment, a quartz glass protective tube 8 is also set on the outside of the metal outer cover 2 of the light bulb to play a further protection role.

As shown in FIG. 4, in an optional solution of this embodiment, a fixing frame 6, a power-on adapter plate 7, and a fan 5 are sequentially arranged at the rear end of the fin radiator 4. The fixing frame 6 is superposed with the power-on adapter plate 7, and the front end surface of the fixing frame 6 It is fixed to the rear end of the fin heat sink 4. The fixing frame 6 and the power-on adapter plate 7 are provided with screw holes, and the fan 5 is fixed on the power-on adapter plate 7 by screws. The power-on adapter board 7 supplies power to the fan 5 and the LED-COB light source 1 at the same time. It should be noted that in this embodiment, only the fan 5 is connected to the fixing frame 6 and the power-supply adapter plate 7 by screws, and the remaining parts include a three-dimensional three-dimensional temperature equalizing plate 3, an LED-COB light source 1, a bulb metal cover 2, The finned heat sink 4, the fixing frame 6, and the power-on adapter board 7 are all soldered and connected at high temperature by tin-silver-copper environmental protection solder paste. This connection method makes the entire vehicle light have better anti-vibration performance in all directions of XYZ, the connection strength between the various parts is high, the structure is firm, the thermal resistance is low, and the heat dissipation is good. The vibration test of the car found that the anti-vibration performance of the headlight of the car was significantly better than other existing lights.

As shown in FIG. 5, in another optional solution of this embodiment, the automobile headlight further includes a fan fixing frame 109 and a fan mounting frame 110, and a fan mounting frame and a fan fixing frame are sequentially arranged at the rear end of the fin radiator; The fan is fixed on the fan fixing frame, and the fan fixing frame is installed on the rear end of the fin radiator through the fan mounting frame. The car headlight also includes a wire cover 111 for protecting the wires of the LED-COB light source and the wires of the fan.

As shown in FIG. 6, in an alternative solution of this embodiment, one end of the LED-COB light source is flush with the blind end of the evaporation cavity, that is, one end of the LED-COB light source is flush with the end of the evaporation cavity far from the condensation cavity. Flat, which shortens the length of the evaporation cavity, and can evaporate the cooling liquid at the blind end of the evaporation end, and can also effectively use the light emitted by the LED-COB light source. The end where the LED-COB light source is flush with the blind end of the evaporation cavity is an oval structure, which can minimize the lens alignment of the LED-COB light source. Interference of light coming out.

Referring to FIG. 7 to FIG. 17, in an optional solution of this embodiment, the automobile headlight further includes a power distribution box 112; the power distribution box 112 is electrically connected to the LED-COB light source and the fan, respectively. Power is supplied to the distribution box from the car's power supply.

As shown in FIG. 4, in an alternative solution of this embodiment, the finned radiator 4 is in the form of a hollow cylinder with 180 ° parallel air ducts arranged around it, and its front end absorbs heat from the condensation end 102 of the three-dimensional isothermal plate 3. , Dissipate heat to the outside through the fins. The fan 5 adopts an aerodynamic structure, and its blades extend into the hollow tube of the finned radiator 4, and the wind blown by it can be applied to the condensing end 102 of the finned radiator 4 and the three-dimensional isothermal plate 3, It is possible to further accelerate the cooling and cooling of the fin radiator 4 and the condensation end 102. The bulb metal cover 2 is made of magnesium alloy material as a whole, with low density, high specific strength, large specific elastic modulus, good heat dissipation, good shock absorption, large impact load capacity, and good resistance to organic and alkali corrosion. Therefore, the use of magnesium alloy to prepare the metal outer cover of the bulb has good heat radiation performance, which can quickly dissipate the heat generated by the LED-COB light source through heat radiation and reduce the temperature of the lamp.

In an optional solution of this embodiment, the thickness (diameter size) of the condensation cavity 104 is larger than the thickness (diameter size) of the evaporation cavity 103. In this way, the structure in which the condensation chamber 104 is larger and the evaporation chamber 103 is smaller can form a pressure difference between the condensation chamber 104 and the evaporation chamber 103, so that the flow rate of the gas-phase cooling liquid 107 can be accelerated, and the circulation speed and heat dissipation efficiency can be increased.

In the optional solution of this embodiment, the housing 106 of the three-dimensional three-dimensional isothermal plate 3, the fin radiator 4, the fixing frame 6, and the power-supply adapter plate 7 all adopt low heat. Resistive red copper material can further improve its heat dissipation performance.

Referring to FIG. 7 to FIG. 17, in an alternative solution of this embodiment, various shapes or forms of connection structures, such as a card slot 22, a socket 21, and a card plate 23, are provided on the outer side of the metal outer cover 2 of the bulb, as required, so that It can be connected with various types of lamp assembly housings. Therefore, the original halogen lamp or HID lamp can be directly replaced without replacing the original lamp lamp housing. The focus is accurate, the installation is convenient, and the cost is reduced.

To sum up, the automotive headlight provided by the embodiment of the present invention integrates four heat dissipation technical means of phase change heat dissipation, metal heat sink heat conduction heat dissipation, air cooling heat dissipation, and radiation heat dissipation, which can timely and efficiently use the heat generated by the LED-COB light source. It is emitted to ensure that the LED-COB light source is maintained at a suitable working temperature. It can be known through testing that the entire lamp works at 100 ° C, and the temperature difference between the bulb temperature and the ambient temperature is within 10 ° C, which is lower than the diode PN junction temperature. T-shaped three-dimensional three-dimensional isothermal plate, the coolant flow is shorter and the circulation speed is faster; the area of the evaporation cavity and the condensation cavity is larger, and it is easier to install with LED-COB light sources and other radiator components, and the heat absorption and heat dissipation effect is more it is good. The overall structure has good shock-proof effect and firm structure; easy installation and accurate focusing, which can perfectly replace the original bulb, and is suitable for various models.

In the end, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not depart from the essence of the corresponding technical solutions. The scope of the technical solutions of the embodiments. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments and not other features, the combination of features of different embodiments is meant to be within the scope of the present invention Within and form different embodiments. For example, in the scope of the following patent applications, any one of the claimed embodiments can be used in any combination.

Claims (18)

A three-dimensional three-dimensional temperature isolating plate, which is used in a headlight of an automobile, includes: a condensing cavity. The structure of the condensing cavity is a hollow disc-shaped structure. The upper surface of the condensing cavity has a circular center. And an evaporation cavity, the structure of the evaporation cavity is a hollow long plate structure, and is provided with a blind end; the other end of the evaporation cavity is fixed on the upper surface of the condensation cavity in a vertical manner with respect to the other end of the blind end. At the center of the circle, and the composition structure of the evaporation cavity and the condensation cavity is a three-dimensional structure in which each radial cross-sectional structure is T-shaped; and the evaporation cavity and the condensation cavity are both vacuum chambers and filled with cooling liquid The two are in communication with each other; the inner wall of the evaporation cavity and the condensation cavity is provided with a capillary core layer; wherein, in the capillary core layer, the thickness of the capillary core layer on one side is 0.1 mm to 100 mm; and the capillary The core layer had a porosity of 50%. The three-dimensional three-dimensional isothermal plate according to claim 1, wherein the thickness of the condensation chamber is greater than the thickness of the evaporation chamber. The three-dimensional three-dimensional isothermal plate according to claim 1 or 2, wherein the evaporation cavity and the condensation cavity are made of red copper or aluminum, and the capillary core layer is made of copper or aluminum. The three-dimensional three-dimensional isothermal plate according to claim 1 or 2, wherein the material of the cooling liquid is water. A method for preparing a three-dimensional three-dimensional isothermal plate. The three-dimensional three-dimensional isothermal plate is the three-dimensional three-dimensional isothermal plate described in any one of claims 1 to 4. The method for preparing the three-dimensional three-dimensional isothermal plate includes the following steps: preparing a condensation chamber. The inner surface of the shell of the condensation chamber is covered with copper powder or aluminum powder particles, or covered with a copper wire mesh or an aluminum wire mesh, and sintered to form a capillary core layer having a capillary effect; preparing an evaporation chamber Shell: Cut the oxygen-free copper pipe or oxygen-free aluminum pipe into sections according to the design length to obtain a pipe fitting, and insert it into the central steel rod, so that a gap of a predetermined thickness is formed between the central steel rod and the pipe wall, and into the gap Filled with pressed copper powder particles or aluminum powder particles, and then sintered to form a capillary core layer; one end of the tube sintered with the capillary core layer is closed into a cone shape and welded and sealed; oxygen reduction treatment is performed, and the other end is vacuum-squeezed and sealed. Die and do the welding and sealing treatment, then extrude into a flat shape and cut to a fixed size to obtain the shell of the evaporation cavity; or inside the two pieces of stamped and formed oxygen-free copper or oxygen-free aluminum shells, respectively The surface is pressed to cover the copper powder particles or aluminum powder particles, or the copper wire mesh or the aluminum wire mesh is pressed and sintered to form a capillary core layer; the two shells are pressure-welded or metal-welded in an atmosphere protected environment to obtain the evaporation. The shell of the cavity is connected with the inner capillary core layer of the shell of the condensation chamber and the shell of the evaporation chamber; the connection is made by welding in an atmosphere protected environment, and a copper pipe or The aluminum pipe is welded and deoxidized to form a suction liquid injection joint; and the cooling liquid is injected into the condensation chamber and the evaporation chamber from the suction liquid injection joint and evacuated, and the vacuum is squeezed and bent to seal , And sintered and sealed to obtain a three-dimensional three-dimensional isothermal plate. The method for preparing a three-dimensional isothermal plate according to claim 5, wherein during the sintering of the capillary core layer, the sintering temperature of the copper powder particles and the copper wire mesh is 800 ° C to 1050 ° C, and the sintering time is 1 hour. ~ 6 hours. The method for preparing a three-dimensional three-dimensional isothermal plate according to claim 5, wherein during the sintering of the capillary core layer, the sintering temperature of the copper wire mesh and the aluminum wire mesh is 400 ° C to 550 ° C, and the sintering time is 1 hour. ~ 6 hours. The method for preparing a three-dimensional three-dimensional isothermal plate according to claim 5, wherein the diameter of the copper powder particles or the aluminum powder particles is 10 μm to 1000 μm, and the covering thickness is 0.1 mm to 100 mm. An automobile headlight includes: an LED-COB light source, a metal outer cover of a bulb, a fin radiator, a fan, and a three-dimensional three-dimensional isothermal board as described in any one of claims 1 to 4; the LED-COB light source is attached to The outer surface of the evaporation cavity is used to transfer the heat generated by the LED-COB light source to the evaporation cavity of the three-dimensional three-dimensional isothermal plate; the front end of the fin radiator is attached to the outer surface of the condensation cavity, and the The cooling chamber of the three-dimensional isothermal plate is used for cooling; the fan is arranged at the rear end of the finned radiator to accelerate the cooling of the finned radiator; the metal cover of the bulb is sleeved on the LED-COB light source and the three-dimensional Outside the temperature plate, and the metal cover of the bulb is made of magnesium alloy material. The headlight of a vehicle as described in claim 9, wherein the LED-COB light source is two sets, which are respectively attached to the upper and lower surfaces of the evaporation cavity, and the total thickness of the LED-COB light source and the evaporation cavity does not exceed 3 mm . The automotive headlight as described in claim 9, wherein the finned radiator has a circular structure, and a 180 ° parallel air duct is provided on the outside. The automobile headlight according to claim 9, further comprising a fixing frame and a power-on adapter plate; the fixing frame and the power-on adapter plate are superposed together and disposed between the fin radiator and the fan; the The power-on adapter board supplies power to the fan and the LED-COB light source. The headlight of a vehicle according to claim 12, wherein the fan is connected to the fixing frame and the power-on adapter board by screws. The automotive headlight according to any one of claims 10 to 13, further comprising a quartz glass protective tube fitted on the outside of the metal cover of the bulb. The headlight of an automobile as described in claim 9, wherein the metal cover of the bulb is provided with a slot, a socket and a card plate, and is connected with various types of vehicle light assembly housings. The automotive headlight according to claim 9, further comprising a fan holder and a fan mounting bracket, the fan is fixed on the fan holder, and the fan holder is mounted on the rear of the fin radiator through the fan mounting bracket. end. The headlight of an automobile according to claim 9, wherein one end of the LED-COB light source is flush with the blind end of the evaporation cavity. The automobile headlight according to claim 9, further comprising a power distribution box; the power distribution box is electrically connected to the LED-COB light source and the fan, respectively.