CN210740273U - Laser light source automobile headlamp with efficient and stable luminous flux and automobile - Google Patents
Laser light source automobile headlamp with efficient and stable luminous flux and automobile Download PDFInfo
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- CN210740273U CN210740273U CN201921368282.5U CN201921368282U CN210740273U CN 210740273 U CN210740273 U CN 210740273U CN 201921368282 U CN201921368282 U CN 201921368282U CN 210740273 U CN210740273 U CN 210740273U
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Abstract
The utility model belongs to the car light field discloses a laser source vehicle headlamps and car with luminous flux is stabilized to high efficiency, and this head-light includes lens (9), reflector (7) and mounting panel (4), install laser source (5) and laser emission end (6) on mounting panel (4), its characterized in that the upper surface of mounting panel (4) closely laminates the refrigeration end that has semiconductor refrigeration piece (3), the hot junction of semiconductor refrigeration piece (3) is connected with radiator (1), install cooling fan (10) that are used for strengthening the heat transfer on radiator (1). The utility model discloses a semiconductor refrigeration piece is assisted with radiator, cooling fan and fin, carries out high-efficient stable heat dissipation to the laser source and the laser emission end of the laser instrument as the vehicle headlamps light source, enables the temperature of laser instrument and remains stable to make the laser instrument output luminous flux steadily high-efficiently, improve laser instrument work efficiency, prolong its life.
Description
Technical Field
The utility model relates to a motor vehicle car light technical field specifically relates to a laser source vehicle headlamps and car with luminous flux is stabilized to high efficiency.
Background
The laser has the characteristics of high energy density, good directivity and monochromaticity and the like, and the automobile headlamp adopting the laser light source has wide development prospect.
With the development of laser diode technology, compared with the conventional headlamp, the laser headlamp has the following advantages: (1) the volume is small, and the design choice is more free; (2) the lighting efficiency is high and can reach 170 lm/W; (3) the irradiation distance can reach 600m, which is twice that of the LED lamp. Therefore, the use of laser as the light source of the automobile headlamp is an important direction for the development of the current automobile lamp.
However, the conventional laser has high power and is sensitive to temperature, and when the temperature rises, the light emitting efficiency of the laser is reduced, and the service life of the laser is greatly influenced. The reduction of the luminous efficiency or the shortening of the service life of the laser source automobile headlamp can affect the driving safety, and how to ensure stable and efficient luminous flux output is a main problem which needs to be solved urgently by the laser source automobile headlamp.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving present laser source vehicle headlamps is more sensitive to the temperature, laser instrument luminous efficacy can descend when the temperature risees, and then shortens the life of laser instrument, lead to the big technical problem of driving safety hidden danger, provide a laser source vehicle headlamps and contain the car of this head-light with high-efficient luminous flux of stabilizing, can make the temperature of laser instrument remain stable to make the laser instrument export laser steadily high-efficiently, improve laser instrument work efficiency, increase of service life.
In order to realize the above object, the utility model provides a laser source vehicle headlamps with luminous flux is stabilized to high efficiency, including lens, reflector and mounting panel, install laser source and laser emission end on the mounting panel the upper surface of mounting panel closely laminates the refrigeration end that has the semiconductor refrigeration piece, the hot junction of semiconductor refrigeration piece is connected with the radiator, install the cooling fan who is used for strengthening the heat transfer on the radiator. The semiconductor refrigeration sheet is assisted by the radiator and the cooling fan, the laser serving as the light source of the automobile headlamp is efficiently and stably cooled, and the temperature of the laser can be kept stable, so that the laser stably and efficiently outputs light flux, the working efficiency of the laser is improved, and the service life of the laser is prolonged.
Furthermore, the hot end of the semiconductor refrigeration piece is also connected with a heat conduction pipe. The heat pipe can be derived the heat of the hot end of conductor refrigeration piece through heat-conduction, and the heat pipe dissipates the heat fast through heat radiation, improves the radiating efficiency.
Furthermore, the evaporation end of the heat conduction pipe is connected with the radiator through a screw or a welding mode, the condensation end of the heat conduction pipe is connected with a radiating fin through a screw or a welding mode, and the radiating fin is located below the headlamp lamp cavity. The heat conduction pipe is connected with the radiator, so that the radiation radiating area is enlarged, and the radiating efficiency is further improved; the radiating fin that sets up in the lamp chamber is connected the contact with the hot junction of semiconductor refrigeration piece on the one hand, improves the radiating efficiency of laser instrument, and on the other hand can go out the heat conduction radiation of the environment that the laser instrument is located fast to be favorable to forming the radiating virtuous circle of laser instrument, reduce the temperature of laser instrument fast.
Furthermore, the radiating fin is formed by aluminum, the surface of the radiating fin is subjected to anodic oxidation treatment, the wear resistance is good, the surface hardness is high, the cleaning and passivation are realized, the insulativity is high, the chemical nickel plating is realized, and the adsorbability is strong.
Furthermore, the semiconductor refrigeration sheet is connected with a closed-loop temperature control circuit for sensing the temperature of the radiator; the closed-loop temperature control circuit is suitable for adjusting the working current of the semiconductor refrigeration sheet through a time optimal PID control algorithm at least according to the sensed temperature of the radiator so as to control the heat exchange quantity of the refrigeration end and the heating end of the semiconductor refrigeration sheet and keep the temperature of the laser light source and the temperature of the laser emission end constant. The time optimal PID control algorithm based on the closed-loop temperature control circuit controls the working current of the semiconductor refrigerating sheet within a preset range, so that the refrigerating power of the semiconductor refrigerating sheet is adjusted, the temperature of the laser is stably controlled within a preset interval, instability of output light flux caused by large fluctuation of the temperature of the laser is effectively prevented, and the illumination quality is improved.
Further, the closed-loop temperature control circuit is also suitable for adjusting the working current of the semiconductor refrigeration sheet through a time optimal PID control algorithm according to the dissipation power of the laser light source. On the basis of temperature closed-loop control, the working current of the semiconductor refrigerating sheet is adjusted together by combining the dissipation power of the laser light source, when the temperature measurement is inaccurate or the temperature sensor is damaged, the working current of the semiconductor refrigerating sheet can be adjusted based on the dissipation power of the laser light source, and the reliability and the accuracy of control can be improved, namely double insurance.
The time optimal PID control algorithm is a control algorithm combining Bang-Bang control and PID control, when the difference △ T between the output value Ti and the target value T of a temperature sensor in the closed loop temperature control circuit is larger than a set value a, the Bang-Bang control is adopted, the semiconductor refrigeration sheet starts full-power refrigeration, when the difference △ T between the output value Ti and the target value T of the temperature sensor is smaller than the set value a, the PID control is adopted, the semiconductor material adopted by the existing refrigerator is mainly bismuth telluride, impurities are added into the semiconductor material to form an N-type or P-type semiconductor temperature difference element through special treatment, the output power of the semiconductor refrigeration sheet is adjusted according to the strength of the output signal of the temperature sensor, and finally the temperature of the laser source and the temperature of the laser emitting end are stabilized.
Furthermore, the radiator is formed by aluminum materials, and the surface of the radiator is subjected to anodic oxidation treatment.
Furthermore, the whole surfaces of the mounting plate and the semiconductor refrigerating sheet are coated with heat-conducting media. The mounting plate is formed by high-heat-conduction materials and can buffer the impact of heat dissipation of the laser; the heat transfer medium can improve heat transfer and radiation heat dissipation efficiency.
On the other hand, the utility model provides an automobile, including the first aspect any kind have high-efficient laser source vehicle headlamps who stabilizes luminous flux.
The utility model discloses a semiconductor refrigeration piece is assisted with radiator, cooling fan and fin, carries out high-efficient stable heat dissipation to the laser source and the laser emission end of the laser instrument as the vehicle headlamps light source, enables the temperature of laser instrument and remains stable to make the laser instrument output luminous flux steadily high-efficiently, improve laser instrument work efficiency, prolong its life.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the head lamp of the present invention.
Description of the reference numerals
A heat sink 1; a heat conduction pipe 2; a semiconductor refrigeration plate 3; a mounting plate 4; a laser light source 5; a laser emitting end 6; a mirror 7; a heat sink 8; a lens 9; a heat radiation fan 10.
Detailed Description
The utility model discloses an embodiment of laser source vehicle headlamps with luminous flux is stabilized to high efficiency, as shown in fig. 1, including lens 9, reflector 7 and mounting panel 4, install laser light source 5 and laser emission end 6 on mounting panel 4 the upper surface of mounting panel 4 closely laminates the refrigeration end that has semiconductor refrigeration piece 3, the hot junction of semiconductor refrigeration piece 3 is connected with radiator 1, install the cooling fan 10 that is used for strengthening the heat transfer on radiator 1. The semiconductor refrigeration sheet 3 is assisted by the radiator 1 and the heat dissipation fan 10, so that the laser as the light source of the automobile headlamp is efficiently and stably cooled, the temperature of the laser can be kept stable, the laser can stably and efficiently output light flux, the working efficiency of the laser is improved, and the service life of the laser is prolonged.
In one embodiment, as shown in fig. 1, the hot end of the semiconductor chilling plate 3 is also connected with a heat conducting pipe 2. The heat pipe 2 can lead out the heat at the hot end of the conductor refrigerating sheet 3 through heat conduction, and the heat pipe 2 dissipates the heat quickly through heat radiation, so that the heat dissipation efficiency is improved.
In one embodiment, as shown in fig. 1, the evaporation end of the heat pipe 2 is connected to the heat sink 1 by screws or welding, and the condensation end of the heat pipe 2 is connected to the heat sink 8 by screws or welding, wherein the heat sink 8 is located below the lamp cavity of the head lamp. The heat conduction pipe 2 is connected with the radiator 1, so that the radiation radiating area is enlarged, and the radiating efficiency is further improved; the heat sink 8 that sets up in the lamp chamber is connected the contact with the hot junction of semiconductor refrigeration piece on the one hand, improves the radiating efficiency of laser instrument, and on the other hand can go out the heat conduction radiation of the environment that the laser instrument is located fast to be favorable to forming the radiating virtuous circle of laser instrument, reduce the temperature of laser instrument fast.
In one embodiment, the heat sink 8 is formed of aluminum, and the surface thereof is anodized, so that the heat sink has good wear resistance, high surface hardness, high cleaning passivation, high insulation, and high adsorptivity due to chemical nickel plating.
In one embodiment, the semiconductor chilling plate 3 is connected with a closed-loop temperature control circuit for sensing the temperature of the radiator; the closed-loop temperature control circuit is suitable for adjusting the working current of the semiconductor refrigeration sheet through a time optimal PID control algorithm at least according to the sensed temperature of the radiator so as to control the heat exchange quantity of the refrigeration end and the heating end of the semiconductor refrigeration sheet and keep the temperature of the laser light source and the temperature of the laser emission end constant. The time optimal PID control algorithm based on the closed-loop temperature control circuit controls the working current of the semiconductor refrigerating sheet within a preset range, so that the refrigerating power of the semiconductor refrigerating sheet is adjusted, the temperature of the laser is stably controlled within a preset interval, instability of output light flux caused by large fluctuation of the temperature of the laser is effectively prevented, and the illumination quality is improved.
In one embodiment, the closed-loop temperature control circuit is further adapted to adjust the operating current of the semiconductor chilling plate 3 by a time-optimal PID control algorithm according to the dissipated power of the laser light source. On the basis of temperature closed-loop control, the working current of the semiconductor refrigerating sheet is adjusted together by combining the dissipation power of the laser light source, when the temperature measurement is inaccurate or the temperature sensor is damaged, the working current of the semiconductor refrigerating sheet can be adjusted based on the dissipation power of the laser light source 5, and the reliability and the accuracy of control can be improved, namely double insurance.
In one embodiment, the time-optimal PID control algorithm is a control algorithm combining Bang-Bang control and PID control, when the difference △ T between the output value Ti and the target value T of a temperature sensor in the closed-loop temperature control circuit is larger than a set value a, the Bang-Bang control is adopted, the semiconductor refrigeration sheet starts full-power refrigeration, when the difference △ T between the output value Ti and the target value T of the temperature sensor is smaller than the set value a, the PID control is adopted, the semiconductor material adopted by the existing refrigerator is mainly bismuth telluride, impurities are added to form an N-type or P-type semiconductor temperature difference element through special treatment, the output power of the semiconductor refrigeration sheet 3 is adjusted according to the strength of the output signal of the temperature sensor, and finally the temperature of the laser source 5 and the temperature of the laser emitting end 6 are stabilized.
In one embodiment, the heat sink 1 is formed of an aluminum material, and the surface thereof is anodized.
In one embodiment, the entire surface of the mounting plate 4 and the semiconductor chilling plates 3 are coated with a heat transfer medium. The mounting plate 4 is formed by high heat conduction materials and can buffer the impact of heat dissipation of the laser; the heat transfer medium can improve heat transfer and radiation heat dissipation efficiency.
The utility model discloses an in the embodiment of car, including the head-light of above-mentioned arbitrary embodiment, the technological effect that above-mentioned head-light can realize must belong to the technological effect that this car embodiment can realize, does not give the repeated description here.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (8)
1. The utility model provides a laser source vehicle headlamps with luminous flux is stabilized to high efficiency, includes lens (9), reflector (7) and mounting panel (4), install laser source (5) and laser emission end (6) on mounting panel (4), its characterized in that the last surface of mounting panel (4) closely laminates the refrigeration end that has semiconductor refrigeration piece (3), the hot junction of semiconductor refrigeration piece (3) is connected with radiator (1), install cooling fan (10) that are used for strengthening the heat transfer on radiator (1).
2. The automotive laser headlamp with the efficient and stable light flux as claimed in claim 1, wherein the heat end of the semiconductor chilling plate (3) is further connected with a heat conduction pipe (2).
3. The automotive headlamp with the laser light source and the efficient and stable light flux as claimed in claim 2, wherein the evaporation end of the heat conduction pipe (2) is connected with the heat sink (1) through a screw or welding mode, the condensation end of the heat conduction pipe (2) is connected with a cooling fin (8) through a screw or welding mode, and the cooling fin (8) is located below a headlamp lamp cavity.
4. The laser source automotive headlamp with efficient and stable light flux according to claim 3, wherein the heat sink (8) is formed of an aluminum material, and the surface thereof is anodized.
5. The laser source automobile headlamp with efficient and stable luminous flux according to claim 1, wherein the semiconductor cooling plate (3) is connected with a closed-loop temperature control circuit for sensing the temperature of the radiator (1).
6. The laser source automotive headlamp with efficient and stable light flux according to claim 1, wherein the heat sink (1) is formed of an aluminum material, and the surface thereof is anodized.
7. The laser source automotive headlamp with efficient and stable luminous flux according to claim 1, wherein the entire surfaces of the mounting plate (4) and the semiconductor chilling plates (3) are coated with a heat conducting medium.
8. An automobile characterized by comprising the laser light source automobile headlamp with a highly efficient and stable luminous flux according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921368282.5U CN210740273U (en) | 2019-08-21 | 2019-08-21 | Laser light source automobile headlamp with efficient and stable luminous flux and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921368282.5U CN210740273U (en) | 2019-08-21 | 2019-08-21 | Laser light source automobile headlamp with efficient and stable luminous flux and automobile |
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| CN210740273U true CN210740273U (en) | 2020-06-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469821A (en) * | 2019-08-21 | 2019-11-19 | 华域视觉科技(上海)有限公司 | Laser light source car headlamp and automobile with efficient stable luminous flux |
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2019
- 2019-08-21 CN CN201921368282.5U patent/CN210740273U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469821A (en) * | 2019-08-21 | 2019-11-19 | 华域视觉科技(上海)有限公司 | Laser light source car headlamp and automobile with efficient stable luminous flux |
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