CN110701575A - Heat sink for vehicle lamp - Google Patents
Heat sink for vehicle lamp Download PDFInfo
- Publication number
- CN110701575A CN110701575A CN201911141581.XA CN201911141581A CN110701575A CN 110701575 A CN110701575 A CN 110701575A CN 201911141581 A CN201911141581 A CN 201911141581A CN 110701575 A CN110701575 A CN 110701575A
- Authority
- CN
- China
- Prior art keywords
- heat pipe
- heat
- circuit board
- light source
- source circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
- F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
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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
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to a vehicle lamp heat dissipation device, which comprises a vehicle lamp, a heat pipe and a metal vehicle body, wherein one end of the heat pipe is connected with a light source circuit board of the vehicle lamp and is in seamless contact with the light source circuit board of the vehicle lamp, the other end of the heat pipe is connected with the metal vehicle body and is in seamless contact with the metal vehicle body, a columnar outwards-extending limiting rib is fixed on the surface of the light source circuit board of the vehicle lamp, one end of the heat pipe is inserted into the limiting rib and is in clearance fit with the limiting rib, a radial deformable silica gel ring is fixed on the surface of the metal vehicle body, the other end of the heat pipe is plugged into the silica gel ring, the end face of the end is in contact with the metal vehicle body, a through hole is arranged on a lamp body of the vehicle lamp, a. The invention can lead the heat in the lamp cavity to the outside of the vehicle, and ensures that the LED can work stably in an effective temperature-resistant range all the time.
Description
Technical Field
The invention relates to a car lamp heat dissipation scheme which can be used for a car lamp headlamp and obviously reduce the weight of the whole lamp on the premise of improving heat dissipation.
Background
With the development of high-power LED technology, LEDs are increasingly used as high-low beam light sources of headlamps. However, the power of the LED is high, and the heat dissipation problem is also a difficult problem. At present, whether far and near light of an LED light source is a reflection type or a lens unit, as shown in FIG. 1, the service life and the performance of the LED are mainly ensured by heat dissipation of an ADC heat dissipation block 1 or a heat dissipation block made of other metal materials. The larger the power of the LED is, the larger the required volume of the radiating block is, and because the space in the lamp is limited, sometimes within the allowable space range of the lamp, the radiating block with the maximum volume capable of being accommodated is not enough to achieve the purpose of reducing the target heat, and a fan 2 needs to be additionally arranged to radiate heat together, so that the cost of the vehicle lamp is increased.
The existing car lamp heat dissipation structure or system is used for dissipating the heat of the LED into the whole lamp cavity so as to achieve the purpose of reducing the junction temperature of the LED, the heat dissipation effect is limited, meanwhile, the ADC heat dissipation block is heavy, the fan is high in price, and the light weight and the low cost of the whole car lamp are not facilitated.
Disclosure of Invention
The invention aims to provide a vehicle lamp heat dissipation device, which can ensure that an LED can work stably in an effective temperature-resistant range all the time by guiding heat in a lamp cavity to the outside of a vehicle, improve the heat dissipation effect and reduce the weight and the cost of a lamp.
The main technical scheme of the invention is as follows:
a heat dissipation device for an automobile lamp comprises the automobile lamp, a heat pipe and a metal automobile body, wherein one end of the heat pipe is connected with a light source circuit board of the automobile lamp and in seamless contact, and the other end of the heat pipe is connected with the metal automobile body and in seamless contact.
The light source circuit board and the metal car body are respectively fixed with a limiting structure with an elastic jack, the bottoms of the jacks are respectively the surfaces of the light source circuit board and the metal car body, and two ends of the heat pipe are respectively inserted and fixed in the jacks of the corresponding limiting structures.
The limiting structure can be made of a heat conducting material.
The limiting structure fixed on the light source circuit board of the car lamp can adopt a columnar limiting rib extending outwards, one end of the heat pipe is inserted into the limiting rib and is in tight fit with the limiting rib, and the end face of the end of the heat pipe is in contact with the light source circuit board.
The extending height of the limiting rib is preferably not less than 3 mm.
The metal car body is fixed with the limiting structure which can adopt a radial deformable silica gel ring, the other end of the heat pipe is plugged into the silica gel ring, and the end face of the end is kept in contact with the metal car body.
The inner diameter of the silica gel ring can be smaller than the outer diameter of the other end of the heat pipe, and the difference between the inner diameter and the outer diameter is preferably not more than 2 mm.
The surface that the light source circuit board of car light with the heat pipe is connected can be fixed with the overhanging spacing muscle of column, the one end of heat pipe insert spacing muscle and with spacing muscle clearance fit, on the metal automobile body with the surface that the heat pipe contacted can be fixed with radial deformable silica gel circle, the other end of heat pipe is filled in the silica gel circle, and this end terminal surface and metal automobile body keep in contact.
The lamp body of the car lamp is provided with a through hole, a radial compressible sealing plug is preferably arranged at the through hole, the heat pipe penetrates through a center hole of the sealing plug, and the sealing plug and the heat pipe form sealing between the contact surfaces by utilizing the elastic deformation of the heat pipe.
And the position where any one end or two ends of the central hole of the sealing plug is in contact with the heat pipe can be subjected to glue dispensing treatment.
The invention has the beneficial effects that:
according to the invention, the heat of the LED is quickly dissipated by the guide heat pipe by means of the large-area metal car body, so that the low junction temperature of the LED is well ensured, the LED is ensured to stably work in an effective temperature-resistant range all the time, and the service life and the performance are not influenced by the high junction temperature. Compared with the traditional heat dissipation scheme which achieves the purpose of reducing the junction temperature of the LED by generating air flow in the lamp cavity, the LED junction temperature heat dissipation device has higher heat dissipation efficiency and more obvious heat dissipation effect.
Meanwhile, the weight of the far and near light module can be reduced without a large ADC radiating block or an additional fan, so that the weight of the whole lamp is reduced, the miniaturization and the light weight of the vehicle lamp are facilitated, and the LED lamp can be used as a preferred alternative scheme for quickly and effectively radiating the LED and reducing the weight of the lamp under the driving of increasing LED power and increasing the weight of the lamp.
Drawings
FIG. 1 is a schematic diagram of a prior art heat dissipation scheme for a vehicle lamp;
FIG. 2 is a schematic view of the heat sink of the present invention;
FIG. 3 is a schematic view of a connection structure of an embodiment of the heat sink for a vehicular lamp according to the present invention;
FIG. 4 is a state diagram of the heat pipe in the embodiment of FIG. 3 when the distance light is adjusted upward and downward;
fig. 5 is a schematic view of the deformation of the sealing plug in the embodiment of fig. 3 when dimming the distance light upwards.
Detailed Description
The invention discloses a car lamp heat dissipation device, which comprises a car lamp 3, a diversion heat pipe (heat pipe for short) 4 and a metal car body 5, wherein one end of the heat pipe is connected with a light source circuit board of the car lamp and is in seamless contact, and the other end of the heat pipe is connected with the metal car body and is in seamless contact. The invention conducts the heat of the LED in the working process of the car lamp to the metal car body by the diversion heat pipe and utilizing the existing condition of the car, namely the metal car body, and dissipates the heat rapidly by means of the large-area metal car body, thereby ensuring the low junction temperature of the LED, ensuring the stable working of the LED in the effective temperature-resistant range all the time, having no influence of the high junction temperature on the service life and the performance, and obviously reducing the weight of the whole lamp because a large ADC radiating block or an additional fan is not needed.
And the light source circuit board and the metal car body can be respectively fixed with a limiting structure with an elastic jack, such as a buckle. The hole bottoms of the jacks are respectively the surfaces of the light source circuit board and the metal car body, two ends of the heat pipe are respectively inserted and fixed in the jacks of the corresponding limiting structures, and the elasticity of the jacks of the limiting structures is utilized to ensure the stability of the inserted position of the heat pipe, so that the seamless contact between the heat pipe and the light source circuit board and the metal car body is ensured.
Alternatively, the limiting structure with the elastic insertion hole can also be made of a heat conducting material. As long as the seamless contact between the heat pipe and the limiting structure is ensured, the seamless contact between the heat pipe and the light source circuit board and the metal car body is also ensured.
In the embodiments shown in fig. 3 to 5, the position-limiting structure fixed on the light source circuit board of the car light is a position-limiting rib 6 extending outward in a column shape, and one end of the heat pipe 4 is inserted into the position-limiting rib and is tightly fitted with the position-limiting rib.
The extending height of the limiting ribs is preferably not less than 3mm, so that the stability of heat pipe assembly is ensured.
The metal car body is fixed with the limiting structure which adopts a radial deformable silica gel ring 7, the other end of the heat pipe 4 is plugged into the silica gel ring, and the end face of the end is in zero-gap contact with the metal car body so as to ensure that heat is smoothly guided out of the car body.
The internal diameter of silica gel circle is less than the external diameter of the other end of heat pipe, and the preferred 2mm that does not exceed of difference between the two, both guaranteed the firm of being connected of heat pipe and silica gel circle, make things convenient for the assembly of the two again.
Or, fixed on the light source circuit board of car light limit structure adopts the overhanging spacing muscle 6 of column, the one end of heat pipe 4 insert limit muscle and with limit muscle clearance fit, and this end terminal surface and light source circuit board keep in contact, simultaneously, fixed on the metal automobile body limit structure adopts radial deformable silica gel circle 7, the other end of heat pipe 4 is filled in the silica gel circle, and this end terminal surface and metal automobile body keep in contact.
The lamp body 3-1 of the car lamp is also provided with a through hole, a radial compressible sealing plug 8 is preferably arranged at the through hole, the heat pipe penetrates through the center hole of the sealing plug, and the sealing plug and the heat pipe form sealing between the surfaces in contact by utilizing the elastic deformation of the sealing plug and the heat pipe, so that water leakage is prevented.
Glue dispensing treatment can be carried out on the position (shown as A, B) where any one end or two ends of the central hole of the sealing plug is in contact with the heat pipe, so that the heat pipe can be effectively prevented from moving relative to the sealing plug, and the air tightness between the contact surfaces of the sealing plug and the heat pipe is further ensured.
The sealing plug is characterized in that a circle of gap is formed in the axial middle of the outer cylindrical surface of the sealing plug, the edge of the through hole is embedded into the gap, the sealing plug is fixed relative to the lamp body in the axial direction and the radial direction, and the sealing plug and the lamp body form sealing between the surfaces in contact by utilizing the elastic deformation of the sealing plug and the lamp body, so that water leakage is prevented.
In this embodiment, the car light is a headlamp, and the light source circuit board is a light source circuit board of the high-low beam unit 3-2.
The elasticity of the sealing plug can make the sealing plug well adapt to the position change of the heat pipe following the high and low light units 3-2 when dimming. As shown in fig. 4, the heat pipe is tilted upward or downward in the lamp body and the part outside the sealing plug at the position near the sealing plug when the distance light is adjusted upward or downward, and the tilted orientation is respectively shown in 4' and 4 ". Meanwhile, the part of the sealing plug inside the lamp body deforms greatly along with the position change of the heat pipe, fig. 5 shows the deformed state 8' of the sealing plug when the distance light and the near light are adjusted upwards, and certainly, the part of the sealing plug outside the lamp body also deforms to a certain extent. Because the silica gel ring also has certain elasticity, the residual deformation of the heat pipe positioned outside the lamp body and the sealing plug can be absorbed by the radial deformation of the silica gel plug, so the deformation of the heat pipe along with the dimming is mainly expressed in the lamp body and the central hole of the sealing plug, and the deformation of the heat pipe outside the lamp body and the sealing plug basically tends to an original non-deformation state.
Claims (10)
1. The utility model provides a car light heat abstractor which characterized in that: the automobile lamp heat pipe structure comprises an automobile lamp, a heat pipe and a metal automobile body, wherein one end of the heat pipe is connected with a light source circuit board of the automobile lamp and in seamless contact with the light source circuit board, and the other end of the heat pipe is connected with the metal automobile body and in seamless contact with the metal automobile body.
2. The heat dissipating device for a vehicular lamp according to claim 1, wherein: the light source circuit board and the metal car body are respectively fixed with a limiting structure with an elastic jack, the bottoms of the jacks are respectively the surfaces of the light source circuit board and the metal car body, and two ends of the heat pipe are respectively inserted and fixed in the jacks of the corresponding limiting structures.
3. The heat dissipating device for a vehicular lamp according to claim 2, wherein: the limiting structure is made of a heat conducting material.
4. The heat dissipating device for a vehicular lamp according to claim 2, wherein: the limiting structure fixed on the light source circuit board of the car lamp adopts a columnar limiting rib extending outwards, and one end of the heat pipe is inserted into the limiting rib and is tightly matched with the limiting rib.
5. The heat dissipating device for a vehicular lamp according to claim 4, wherein: the overhanging height of the limiting rib is not less than 3 mm.
6. The heat dissipating device for a vehicular lamp according to claim 2, wherein: the metal car body is fixed with the limiting structure which adopts a radial deformable silica gel ring, the other end of the heat pipe is plugged into the silica gel ring, and the end face of the end is kept in contact with the metal car body.
7. The heat dissipating device for a vehicular lamp according to claim 6, wherein: the inner diameter of the silica gel ring is smaller than the outer diameter of the other end of the heat pipe, and the difference between the inner diameter of the silica gel ring and the outer diameter of the other end of the heat pipe is not more than 2 mm.
8. The heat dissipating device for a vehicular lamp according to claim 1, 2, 3, 4, 5, 6 or 7, wherein: the heat pipe penetrates through a center hole of the sealing plug, and the sealing plug and the heat pipe form sealing between the contact surfaces by utilizing the elastic deformation of the heat pipe.
9. The heat dissipating device for a vehicular lamp according to claim 8, wherein: and glue dispensing treatment is carried out on the position where any one end or two ends of the central hole of the sealing plug is in contact with the heat pipe.
10. The heat dissipating device for a vehicular lamp according to claim 9, wherein: the car light is the head-light, the light source circuit board is the circuit board of far and near light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141581.XA CN110701575A (en) | 2019-11-20 | 2019-11-20 | Heat sink for vehicle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141581.XA CN110701575A (en) | 2019-11-20 | 2019-11-20 | Heat sink for vehicle lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110701575A true CN110701575A (en) | 2020-01-17 |
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ID=69207467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911141581.XA Pending CN110701575A (en) | 2019-11-20 | 2019-11-20 | Heat sink for vehicle lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110701575A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396829A (en) * | 2020-04-28 | 2020-07-10 | 一汽奔腾轿车有限公司 | Heat radiator for car optical system |
-
2019
- 2019-11-20 CN CN201911141581.XA patent/CN110701575A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396829A (en) * | 2020-04-28 | 2020-07-10 | 一汽奔腾轿车有限公司 | Heat radiator for car optical system |
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