CN106931382B - Heat dissipation element for LED car lamp and preparation method thereof - Google Patents
Heat dissipation element for LED car lamp and preparation method thereof Download PDFInfo
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- CN106931382B CN106931382B CN201710195301.8A CN201710195301A CN106931382B CN 106931382 B CN106931382 B CN 106931382B CN 201710195301 A CN201710195301 A CN 201710195301A CN 106931382 B CN106931382 B CN 106931382B
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- Prior art keywords
- wire mesh
- phase change
- woven wire
- heat dissipation
- change material
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/56—Cooling arrangements using liquid coolants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
Abstract
The invention discloses a heat dissipation element for an LED car lamp and a preparation method thereof. The heat dissipation element comprises a heat dissipation base (1), a metal woven wire mesh (2), a phase change material (3) and a high-heat-conductivity insulating coating (4). The preparation method comprises the following steps: (1) The metal woven wire mesh is adjusted to be unfolded according to the inner cavity of the car lamp and immersed in the phase change material, so that the phase change material fills the gap of the metal woven wire mesh to obtain a composite phase change material metal woven wire mesh with a fixed shape; (2) And welding the metal woven wire mesh on the heat dissipation base, and spraying a high-heat-conductivity insulating coating on the surfaces of the heat dissipation base and the metal woven wire mesh to obtain the integrated heat dissipation element for the LED car lamp. The invention has stronger space adaptability, and the metal woven wire mesh and the phase-change material are combined to be used as the heat dissipation element of the LED car lamp, so that the heat transfer and storage performance of the LED car lamp can be improved, and the system stability is improved.
Description
Technical Field
The invention relates to the technical field of radiator manufacturing, in particular to a radiating element for an LED car lamp and a preparation method thereof.
Background
The LED has the obvious advantages of environmental protection, energy conservation, high efficiency, low working voltage (about 3V), safety, long service life (up to 10 ten thousand hours), rich color, small volume, high response speed, vibration resistance, easy maintenance and the like. Due to the advantages of LED light sources, LED car lights have become popular among more and more automobile manufacturers. However, the heat current density of the LED lamp is high, the heat management of the automotive headlamp is special, and many factors such as the spatial condition of the automotive lamp and the ambient temperature of the inner cavity of the automotive lamp need to be considered. The volume of the inner cavity of the automobile headlamp is small, and the traditional radiator is relatively fixed in shape and difficult to meet the heat dissipation requirement under the narrow space condition.
Woven wire mesh is commonly used in high voltage power systems and has the characteristics of high electrical conductivity, high thermal conductivity and flexibility. The metal woven wire mesh has strong space adaptability, can adjust the expansion shape in a limited space, and plays a role in heat dissipation in the inner cavity of the car lamp. The metal woven wire mesh and the phase-change material are combined to be used as the heat dissipation element of the LED car lamp, so that the heat transfer and storage performance of the LED car lamp can be improved, and the system stability is improved.
Disclosure of Invention
The invention aims to provide a heat dissipation element for an LED car lamp and a preparation method thereof, which can improve the heat dissipation capability of the LED car lamp and solve the problem of heat dissipation of the LED car lamp in a limited space.
The invention is realized by the following technical scheme.
A heat dissipation element for an LED car lamp comprises a heat dissipation base, a metal woven wire mesh, a phase change material and a high-heat-conductivity insulating coating; fins are arranged on the surface of the heat dissipation base; the bottom end of the heat dissipation base is provided with an installation groove; a metal woven wire mesh is welded in the mounting groove; the phase-change material is filled in the gaps of the metal woven wire mesh; the surfaces of the heat dissipation base and the metal woven wire mesh are both sprayed with high-heat-conduction insulating coatings.
Furthermore, the metal woven wire mesh is woven by metal wires, and the width of the cross section of the metal woven wire mesh is 10mm to 50mm.
Furthermore, the metal wire is made of high-thermal-conductivity metal comprising red copper or aluminum, and the diameter of the cross section of the metal wire is 0.1mm-0.4 mm.
Further, the main component of the phase change material includes one or more of solid-solid phase change materials including neopentyl glycol (NPG), pentaerythritol (PE), trimethylol methylamine (TAM), and trimethylol ethane (PG).
Further, the phase change temperature of the phase change material is 30-70 ℃.
Further, the heat dissipation base is made of aluminum alloy.
Further, the material of the high-thermal-conductivity insulating coating is boron nitride silicon resin.
Further, the thickness of the high-thermal-conductivity insulating coating is 0.3 to 1mm.
The method for preparing the heat dissipation element for the LED vehicle lamp comprises the following steps:
(1) Adjusting the expansion shape of the metal woven wire mesh with the fins according to the inner cavity of the car lamp, heating the phase change material to be above a solid-liquid phase change point, and immersing the metal woven wire mesh into the liquid phase change material under a vacuum condition to enable the phase change material to fill gaps of the metal woven wire mesh;
(2) After the immersion, taking out the metal woven wire mesh filled with the phase change material, and cooling the metal woven wire mesh to be below a phase change temperature point to solidify the phase change material to obtain a composite phase change material metal woven wire mesh with a fixed shape;
(3) And welding the metal woven wire mesh filled with the phase-change material in the mounting groove of the heat dissipation base, and spraying a high-heat-conductivity insulating coating on the surfaces of the heat dissipation base and the metal woven wire mesh to obtain the heat dissipation element for the LED car lamp.
Further, in the step (1), the immersion time is from 10min to 20min.
Compared with the prior art, the invention has the following advantages and effects:
according to the invention, the metal woven wire mesh and the phase-change material are combined to be used as the LED car lamp heat dissipation element, and the heat of the LED chip is rapidly transferred by utilizing the good flexibility and heat conductivity of the metal woven wire mesh and combining the heat storage characteristic of the phase-change material, so that the purpose of efficient heat dissipation is achieved.
Drawings
FIG. 1 is a schematic structural diagram of a heat dissipation member for an LED vehicular lamp according to the present invention in an actual application to an LED vehicular lamp;
fig. 2 is a schematic diagram of a layered structure of the heat dissipation device of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and specific examples.
The schematic structural diagram of the heat dissipation element for the LED vehicle lamp in actual use for the LED vehicle lamp is shown in FIG. 1, and the heat dissipation element comprises a heat dissipation base 1, a metal woven wire mesh 2, a phase change material 3, a high-thermal-conductivity insulating coating 4, an LED light source 7 and a lamp holder 8;
the heat dissipation base 1 is made of aluminum alloy; the surface of the heat dissipation base 1 is provided with fins 5; the bottom end of the heat dissipation base 1 is provided with an installation groove 6; three groups of metal woven wire meshes 2 are welded in the mounting groove 6; the metal woven wire mesh 2 is woven by metal wires, the metal wires are made of high-thermal-conductivity metal comprising red copper or aluminum, and the diameter of the cross section of each metal wire is 0.1mm to 0.4mm; the width of the section of the metal woven wire mesh 2 ranges from 10mm to 50mm;
the phase-change material 3 is filled in the gap of the metal woven wire mesh 2; the main component of the phase change material 3 comprises more than one of solid-solid phase change materials including neopentyl glycol (NPG), pentaerythritol (PE), trimethylol methylamine (TAM) and trimethylol ethane (PG); the phase change temperature of the phase change material 3 is 30-70 ℃;
the surfaces of the heat dissipation base 1 and the metal woven wire mesh 2 are both sprayed with high-heat-conductivity insulating coatings 4; the high-thermal-conductivity insulating coating 4 is made of boron nitride silicon resin; the thickness of the high-thermal-conductivity insulating coating 4 is 0.3 to 1mm;
a schematic diagram of a layered structure of the metal woven wire mesh 2 coated with the high thermal conductive insulating coating 4 is shown in fig. 2, and the metal woven wire mesh 2 sequentially comprises the high thermal conductive insulating coating 4, a phase change material 3 and the metal woven wire mesh from the surface to the inside;
the whole heat dissipation element device is arranged at the bottom of the lamp holder 8, and the LED light source 7 is arranged at the upper end of the lamp holder 8.
Example 1
A heat dissipation element for an LED car lamp and a preparation method thereof comprise the following steps:
(1) Selecting a red copper metal woven wire mesh with the cross section width of 10mm and the diameter of 0.1mm, wherein the fins are arranged on the red copper metal woven wire mesh, and adjusting the unfolding shape of the red copper metal woven wire mesh according to the inner cavity of the car lamp;
(2) Neopentyl glycol and pentaerythritol in a molar ratio of 1.6 are used as main components of the composite phase change material (the phase change temperature is 30 ℃), the phase change material is heated to be above a solid-liquid phase change point, and the metal woven wire mesh is immersed in the liquid phase change material under a vacuum condition, so that the phase change material fills gaps of the red copper metal woven wire mesh;
(3) After immersing for 10min, taking out the red copper metal woven wire mesh filled with the phase change material, cooling to a temperature below a phase change temperature point, and solidifying the phase change material to obtain a composite phase change material red copper metal woven wire mesh with a fixed shape;
(4) And welding the metal woven wire mesh in the mounting groove of the aluminum alloy heat dissipation base, and spraying a boron nitride silicon resin coating with the thickness of 0.3mm on the surfaces of the heat dissipation base and the metal woven wire mesh to obtain the heat dissipation element for the LED car lamp.
Compared with the traditional LED car lamp with a fin structure, the LED car lamp heat dissipation element with the integration of the metal woven wire mesh, the phase change material and the high-heat-conductivity insulating coating prepared by the method has stronger space adaptability and heat conductivity, and the junction temperature of an LED is reduced by 18.5%.
Example 2
A heat dissipation element for an LED car lamp and a preparation method thereof comprise the following steps:
(1) Selecting an aluminum metal woven wire mesh with the cross section width of the fins being 30mm and the diameter of the metal wire being 0.2mm, and adjusting the unfolding shape of the aluminum metal woven wire mesh according to the inner cavity of the car lamp;
(2) Taking neopentyl glycol, pentaerythritol and trimethylolethane with a molar ratio of 1.6;
(3) After the aluminum metal woven wire mesh filled with the phase change material is immersed for 15min, taking out the aluminum metal woven wire mesh filled with the phase change material, cooling the aluminum metal woven wire mesh to be below a phase change temperature point, and solidifying the phase change material to obtain a composite phase change material aluminum metal woven wire mesh with a fixed shape;
(4) And welding the aluminum metal woven wire mesh in the mounting groove of the heat dissipation base, and spraying a boron nitride silicon resin coating with the thickness of 0.7mm on the surfaces of the heat dissipation base and the metal woven wire mesh to obtain the heat dissipation element for the LED car lamp.
Compared with the traditional LED car lamp with a fin structure, the LED car lamp heat dissipation element integrating the metal woven wire mesh, the phase change material and the high-heat-conductivity insulating coating prepared by the method has stronger space adaptability and heat conductivity, and the LED junction temperature is reduced by 21.7%.
Example 3
A heat dissipation element for an LED car lamp and a preparation method thereof comprise the following steps:
(1) Selecting a red copper metal woven wire mesh with the cross section width of 50mm and the metal wire diameter of 0.4mm, wherein the red copper metal woven wire mesh is provided with fins, and the unfolding shape of the red copper metal woven wire mesh is adjusted according to the inner cavity of the car lamp;
(2) Taking neopentyl glycol, trimethylol methylamine and trimethylol ethane with a molar ratio of 1.6 to 2.5 as main components of the composite phase change material (the phase change temperature is 70 ℃), heating the phase change material to be above a solid-liquid phase change point, immersing the red copper metal woven wire mesh in the liquid phase change material under a vacuum condition, and filling the phase change material in gaps of the red copper metal woven wire mesh;
(3) After 20min of immersion, taking out the red copper metal woven wire mesh filled with the phase change material, cooling to a temperature below a phase change temperature point, and solidifying the phase change material to obtain a composite phase change material red copper metal woven wire mesh with a fixed shape;
(4) And welding the metal woven wire mesh in the mounting groove of the heat dissipation base, and spraying a boron nitride silicon resin coating with the thickness of 1mm on the surfaces of the heat dissipation base and the metal woven wire mesh to obtain the heat dissipation element for the LED car lamp.
Compared with the traditional LED car lamp with a fin structure, the LED car lamp heat dissipation element integrating the metal woven wire mesh, the phase change material and the high-heat-conductivity insulating coating prepared by the method has stronger space adaptability and heat conductivity, and the LED junction temperature is reduced by 24.2%.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (7)
1. A method for a heat dissipating element for an LED vehicle lamp, characterized in that the method is implemented based on a heat dissipating element for an LED vehicle lamp, comprising a heat dissipating base (1), a metal woven wire mesh (2), a phase change material (3) and a high thermal conductivity insulating coating (4); fins (5) are arranged on the surface of the heat dissipation base (1); the bottom end of the heat dissipation base (1) is provided with an installation groove (6); a metal woven wire mesh (2) is welded in the mounting groove (6); the phase change material (3) is filled in the gaps of the metal woven wire mesh (2); the surfaces of the heat dissipation base (1) and the metal woven wire mesh (2) are both sprayed with high-heat-conductivity insulating coatings (4), and the method comprises the following steps:
the method comprises the following steps that (1) the metal woven wire mesh (2) provided with fins (5) is adjusted to be unfolded according to an inner cavity of the car lamp, a phase change material (3) is heated to be above a solid-liquid phase change point, and the metal woven wire mesh (2) is immersed in the liquid phase change material (3) under a vacuum condition, so that the phase change material (3) fills gaps of the metal woven wire mesh (2);
(2) After immersion, taking out the metal woven wire mesh (2) filled with the phase change material (3), and cooling to a temperature below a phase change temperature point to solidify the phase change material (3) to obtain a composite phase change material metal woven wire mesh with a fixed shape;
(3) Welding the metal woven wire mesh (2) filled with the phase change material (3) in the mounting groove (6) of the heat dissipation base (1), and spraying the high-heat-conductivity insulating coating (4) on the surfaces of the heat dissipation base (1) and the metal woven wire mesh (2) to obtain the heat dissipation element for the LED car lamp.
2. The method of claim 1, wherein the heat dissipation base (1) is made of aluminum alloy; the metal woven wire mesh (2) is woven by metal wires, and the width of the section of the metal woven wire mesh (2) ranges from 10mm to 50mm.
3. The method for the heat dissipation element of the LED car lamp according to claim 2, wherein in the heat dissipation element, the metal wire is made of high thermal conductivity metal and comprises red copper or aluminum, and the cross-sectional diameter of the metal wire is 0.1mm to 0.4mm.
4. The method for the heat dissipating element of the LED automotive lamp according to claim 1, wherein the main component of the phase change material (3) comprises one or more of solid-solid phase change materials including neopentyl glycol, pentaerythritol, trimethylol methylamine and trimethylol ethane.
5. The method for the heat dissipation element of the LED car lamp is characterized in that the phase change temperature of the phase change material (3) is 30-70 ℃.
6. The method for a heat dissipating element for an LED vehicle lamp according to claim 1, wherein the material of the high thermal conductivity insulating coating (4) is a boro-nitride-silicon resin; the thickness of the high-thermal-conductivity insulating coating (4) is 0.3 to 1mm.
7. The method as claimed in claim 1, wherein the immersion time in step (1) is 10min to 20min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710195301.8A CN106931382B (en) | 2017-03-29 | 2017-03-29 | Heat dissipation element for LED car lamp and preparation method thereof |
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| CN201710195301.8A CN106931382B (en) | 2017-03-29 | 2017-03-29 | Heat dissipation element for LED car lamp and preparation method thereof |
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| CN106931382A CN106931382A (en) | 2017-07-07 |
| CN106931382B true CN106931382B (en) | 2023-03-21 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109611778B (en) * | 2018-12-31 | 2021-10-15 | 广州市诺思赛光电科技有限公司 | LED car light based on braid over braid heat dissipation |
| CN112802808A (en) * | 2019-11-14 | 2021-05-14 | 承奕科技股份有限公司 | Composite heat sink with plug-in port for heating element and heat sink with the same |
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| JP3125836U (en) * | 2006-07-21 | 2006-10-05 | 李 家茂 | Light source heat conduction structure |
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| JP2011061157A (en) * | 2009-09-14 | 2011-03-24 | Starlite Co Ltd | Heatsink for led and led lamp for vehicle |
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