JP6960746B2 - Heat dissipation structure of vehicle lighting equipment - Google Patents

Description

The present invention relates to a heat dissipation structure of a vehicle lamp that cools a light source by promoting heat dissipation of a radiator installed in a duct by air flowing through the duct.

In recent years, semiconductor light emitting elements such as LEDs (light emitting diodes), which have advantages such as high luminous efficiency, high brightness, and power saving, have been used as light sources for vehicle lamps such as head lamps arranged on the left and right sides of the front of the vehicle. It's getting better. While this type of semiconductor light emitting device has the above-mentioned advantages, it tends to become high in temperature due to heat generation, and when the temperature becomes high, there is a problem that the luminous efficiency and the life are lowered.

Therefore, in a vehicle lamp that uses a semiconductor light emitting element as a light source, it is necessary to cool the semiconductor light emitting element by an appropriate means. Therefore, for example, Patent Document 1 proposes a heat dissipation structure shown in FIG.

That is, FIG. 16 is a vertical cross-sectional view showing the heat dissipation structure of the vehicle lighting fixture proposed in Patent Document 1. In the illustrated heat dissipation structure, the duct 103 is provided along the housing 102 of the vehicle lighting fixture 101 such as a head lamp. In addition to arranging the lamps, a heat exchange unit 105 such as a heat sink for radiating heat generated by the LED 104 as a light source is arranged in the duct 103.

In such a heat dissipation structure, the heat generated by the LED 104 when the vehicle lighting tool 101 is lit is the heat generated in the process in which the traveling wind generated by the traveling of the vehicle flows in from the intake port 103a of the duct 103 and is discharged from the exhaust port 103b. Since heat is dissipated by heat exchange with the running wind in the switching unit 105, the LED 104 is cooled and its luminous efficiency and life are prevented from being lowered.

Japanese Unexamined Patent Publication No. 2008-226843

However, in the heat dissipation structure proposed in Patent Document 1, the heat exchange unit 105 cannot exert the heat exchange function when the traveling wind does not flow in the duct 103 because the vehicle is stopped. Since the hot air in the engine room 106 flows back from the exhaust port 103b into the duct 103 to heat the heat exchange section 105, there is a problem that the LED 104 cannot be effectively cooled.

The present invention has been made in view of the above problems, and an object of the present invention is a vehicle lamp capable of ensuring the required heat dissipation performance and suppressing the temperature rise of the light source even when the vehicle is stopped by a simple configuration. Is to provide a heat dissipation structure.

In order to achieve the above object, the invention according to claim 1 is provided in a vehicle provided with an openable and closable grill shutter arranged behind the front grill arranged at the front end and in front of the engine room, and is provided with a light source. A vehicle lamp having a heat dissipation structure including a radiator that dissipates heat generated by the light source. The radiator is internally provided in the heat radiating portion of the duct provided with the portion, and the air flowing into the duct from the intake port and discharged from the exhaust port promotes heat dissipation of the radiator to cool the light source. In the heat dissipation structure of the vehicle lighting equipment, at least one of the intake port and the exhaust port of the duct is opened between the front grill and the engine room in the front-rear direction of the vehicle, and the intake port of the duct is opened from the grill shutter. Is also characterized by having an opening at the rear of the vehicle.

The invention according to claim 2 is the invention according to claim 1, wherein an on-off valve is provided at the intake port of the duct, and a control means for controlling the opening and closing of the on-off valve independently of the opening and closing of the grill shutter is provided. It is characterized by that.

The invention according to claim 3 is provided in a vehicle provided with an openable / closable grill shutter arranged behind the front grill arranged at the front end and in front of the engine room, and the light source and the heat generated by the light source. The heat dissipation structure of a vehicle lamp equipped with a radiator that dissipates heat, and the heat dissipation of a duct having an intake portion that opens as an intake port at one end, a heat dissipation portion that extends in the vertical direction, and an exhaust portion that opens at the other end as an exhaust port. A heat dissipation structure of a vehicle lighting tool in which the radiator is internally provided in a portion, and the air flowing into the duct from the intake port and being discharged from the exhaust port promotes heat dissipation of the radiator to cool the light source. In, at least one of the intake port and the exhaust port of the duct is opened between the front grill and the engine room in the vehicle front-rear direction, an on-off valve is provided at the intake port of the duct, and the on-off valve is used as the grill shutter. It is characterized by being composed of a part of.

According to the present invention, when the vehicle is stopped, when the air in the duct is heated by the radiator having a high temperature, the density of the heated air decreases, so that the air flow rises in the vertical portion of the duct. Is induced, and the low temperature outside air is sucked into the duct from the intake port and discharged from the exhaust port, so that an air flow is generated in the duct. Then, since the heat dissipation of the radiator is promoted by the natural air cooling by the air flowing through the duct, the temperature rise of the light source is suppressed. Since such an effect can be obtained by a simple configuration without requiring a separate device such as a fan, it does not cause a significant cost increase or structural complication.

It is a half-cut front view of a vehicle. It is a perspective view which shows the basic structure of the heat dissipation structure of the vehicle lamp which concerns on this invention. FIG. 5 is a plan sectional view showing a basic configuration of a heat dissipation structure of a vehicle lamp according to the present invention. It is a front view which shows the basic structure of the heat dissipation structure of the vehicle lamp which concerns on this invention. It is a perspective view which shows the internal structure of the front part of a vehicle. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the vehicle lamp which concerns on Embodiment 1 of this invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the vehicle lamp which concerns on Embodiment 1 of this invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the vehicle lamp which concerns on Embodiment 1 of this invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the vehicle lamp which concerns on Embodiment 1 of this invention. FIG. 5 is a plan sectional view of an intake port portion of a duct in a heat dissipation structure of a vehicle lamp according to a first embodiment of the present invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the lighting fixture for a vehicle which concerns on Embodiment 2 of this invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the lighting fixture for a vehicle which concerns on Embodiment 2 of this invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the vehicle lighting equipment which concerns on Embodiment 3 of this invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the vehicle lighting equipment which concerns on Embodiment 3 of this invention. It is a side sectional view of the front part of a vehicle which shows the heat dissipation structure of the vehicle lighting equipment which concerns on Embodiment 3 of this invention. It is a vertical cross-sectional view which shows the heat dissipation structure of the vehicle lighting fixture proposed in Patent Document 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a half-cut front view of the vehicle, and vehicle lamps 1 used as headlamps (only the one on the right side is shown in FIG. 1) are arranged on the left and right sides of the front portion of the illustrated vehicle 20. A louver-shaped front grill 21 for taking in outside air (running wind) is arranged in an engine room (not shown) in the central portion of the front surface of the vehicle lighting tool 1, and a front bumper 22 is arranged below the louver-shaped front grill 21. Are arranged horizontally in the vehicle width direction. In FIG. 1, 23 is a bonnet covering the upper part of the engine room, 24 is a windshield, 25 is left and right front wheels (only one is shown in FIG. 1), and 26 is left and right side mirrors.

Next, the basic configuration of the heat dissipation structure of the vehicle lamp 1 according to the present invention will be described below with reference to FIGS. 2 to 4.

FIG. 2 is a perspective view showing the basic configuration of the heat dissipation structure of the vehicle lamp according to the present invention, FIG. 3 is a plan sectional view showing the basic configuration of the heat dissipation structure, and FIG. 4 is a front view showing the basic configuration of the heat dissipation structure. be. In the following, the basic configuration of the heat dissipation structure of the vehicle lamp 1 on one side (right side) will be illustrated and described, but since the basic configuration of the heat dissipation structure of the vehicle lamp on the other side (left side) is the same, this will be discussed. Illustration and description of the above will be omitted.

As shown in FIG. 3, vehicle lamps 1 used as headlamps are arranged side by side in the lighting chamber 4 defined by a transparent outer lens 3 covering the housing 2 and its front opening. It is configured to accommodate three lamp modules 5, three semiconductor light emitting elements 6 as light sources, an extension 7, and the like. Here, the three semiconductor light emitting elements 6 are arranged inside the vehicle (right side in FIG. 3) of the housing 2 at appropriate intervals along the vehicle front-rear direction (vertical direction in FIG. 3), and each semiconductor light emitting element 6 is arranged. Is connected to each lamp module 5 via a transmission fiber 8. Further, each lamp module 5 includes a phosphor 9 and a lens 10 for controlling light distribution. When the vehicle lamp 1 used as a head lamp emits white light, a blue LED is used for each semiconductor element 6, and a yellow phosphor is used for each phosphor 9.

By the way, as shown in FIGS. 2 to 4, a heat sink 11 as a radiator arranged outside the housing 2 is incorporated in the side wall of the housing 2 inside the vehicle. As shown in FIG. 3, the heat sink 11 is composed of a flat plate-shaped base 11a incorporated in the side wall of the housing 2 and a plurality of heat radiating fins 11b vertically erected from the base 11a toward the inside of the vehicle. Has been done. Here, the plurality of heat radiation fins 11b are thin plate-shaped members long in the vertical direction, and these are arranged in the vehicle front-rear direction (arranged at appropriate intervals along the vertical direction in FIG. 3). Is composed of an aluminum alloy with high thermal conductivity.

Here, as shown in FIG. 3, a total of three substrates 12 on which each semiconductor light emitting element 6 is mounted are attached to a flat plate-shaped heat radiating base 13 having high thermal conductivity, and the heat radiating base 13 is a heat sink 11. It is attached in close contact with the base 11a of the above.

A duct 14 that bends in a horizontal U shape in front view is arranged in the engine room of the vehicle 20, and the duct 14 has a substantially horizontal intake portion 14A and a housing 2 as shown in FIG. It is composed of a heat radiating portion 14B that stands vertically along the inner side wall of the vehicle and an exhaust portion 14C that extends diagonally upward from the radiating portion 14B toward the inside of the vehicle (right side in FIG. 4). Specifically, the intake portion 14A of the duct 14 is inclined diagonally downward toward the inside of the vehicle by α shown in the horizontal line, and the exhaust portion 14C is inclined downward by β shown in the horizontal line. It is tilted diagonally upward. At the end of the intake portion 14A of the duct 14, the intake port 14a opens toward the front of the vehicle (in the front direction in FIG. 4), and at the end of the exhaust portion 14C, the exhaust port 14b is inside the vehicle. However, the end face of the exhaust portion 14C is cut diagonally by the angle γ shown in the figure. With this configuration, foreign matter such as water and dust is less likely to enter the duct 14 from the intake port 14a and the exhaust port 14b.

Further, in the duct 14, the heat sink 11 is internally provided in the heat radiating portion 14B that stands vertically.

Next, a specific embodiment of the heat dissipation structure of the vehicle lamp 1 will be described.

In the following, the embodiment is divided into three according to the opening position of the intake port 14a of the duct 14, and a plurality of examples will be described with reference to each embodiment according to the opening position of the exhaust port 14b.

<Embodiment 1>
Embodiment 1 of the present invention will be described below with reference to the accompanying drawings.

FIG. 5 is a perspective view showing the internal structure of the front part of the vehicle, FIG. 6 is a side sectional view showing the internal structure of the front part of the vehicle, and an engine (not shown) is mounted in the engine room 27 of the vehicle 20. In front of this engine, an air conditioner condenser 28, a radiator 29, and a radiator fan 30 are sequentially arranged from the front, the front grill 21 is arranged at the front end of the vehicle in front of these, and the vehicle lighting equipment is arranged on the left and right sides thereof. 1 is arranged. The front grill 21 is divided into upper and lower grills 21A and lower grills 21B with the front bumper 22 as a boundary.

Further, in the front-rear direction of the vehicle, a grill shutter 31 is arranged between the front grill 21 and the condenser 28. The grill shutter 31 controls the traveling resistance of the vehicle by adjusting the air volume of the traveling wind flowing from the front grill 21, and closes when the engine is started to promote warming up. The front bumper 22 is used. It is composed of an upper grill shutter 31A and a lower grill shutter 31B arranged above and below this as a boundary. Here, a plurality of rotatable shielding plates 31a are provided on the upper grill shutter 31A and the lower grill shutter 31B at appropriate intervals in the vertical direction, and these shielding plates 31a are not shown in the motor or the like. The air volume of the traveling wind flowing from the front grill 21 is adjusted by rotating integrally with the drive source. For example, in the initial stage of engine start or in winter when the condenser 28 and the radiator 29 constituting the cooling system do not need to be cooled, if the shielding plates 31a of the upper grill shutter 31A and the lower grill shutter 31B are fully closed, the condenser 28 and the radiator 29 can be fully closed. Since the inflow of the traveling wind passing through the 29 and entering the engine room 27 is blocked, the traveling resistance of the vehicle is reduced. Further, when the shielding plates 31a of the upper grille shutter 31A and the lower grille shutter 31B are opened, the outside air is introduced from the front grille 21 to cool the condenser 28 and the radiator 29, so that the condenser 28 and the radiator 29 have the original functions. Demonstrate.

Therefore, as shown in FIG. 6, the present embodiment is characterized in that the intake port 14a of the duct 14 is opened between the front grill 21 and the grill shutter 31 in the front-rear direction of the vehicle. In the example shown in the above, the intake port 14a of the duct 14 opens above the front bumper 22 in front of the grill shutter 31, and the exhaust port 14b opens in front of the vehicle of the upper grill shutter 31A.

Therefore, when a current is supplied to each of the semiconductor light emitting elements 6 of the vehicle lamp 1 in the night driving of the vehicle 20, each semiconductor light emitting element 6 emits light, and the blue light is emitted from each transmission fiber 8. It is transmitted to each lamp module 5 through the above, and is converted into white light by passing through the yellow phosphor 9. Then, the white light passes through the lens 10 and the light distribution is controlled, and then passes through the transparent outer lens 3 and is irradiated to the front of the vehicle 20. Therefore, the vehicle lamp 1 functions as a headlamp. Fulfill.

Then, when each of the semiconductor light emitting elements 6 emits light as described above, each of these semiconductor light emitting elements 6 generates heat, but the heat is conducted to the heat sink 11 via the substrate 12 and the heat dissipation base 13, and the heat sink 11 The heat is radiated from the plurality of heat radiating fins 11b.

Thus, when the vehicle 20 is traveling, the traveling wind flows into the duct 14 from the intake port 14a of the duct 14, and is pulled by the negative pressure generated by the operation of the radiator fan 30 to enter the duct 14. Air flows toward the exhaust port 14b, and in the process, each semiconductor light emitting element 6 promotes heat dissipation of the heat sink 11 by heat exchange with the heat sink 11 provided inside the heat sink 14B of the duct 14. It is forcibly cooled and its temperature rise is suppressed, and the reduction in light emission efficiency and life of each semiconductor light emitting element 6 is prevented.

When the vehicle 20 is traveling, if a necessary amount of traveling wind is taken into the condenser 28 and the radiator 29 constituting the cooling system, the air resistance of the vehicle 20 increases. Therefore, the grill shutter 31 is closed and the condenser 28 is closed. The amount of running wind flowing to the radiator 29 and the radiator 29 is limited to reduce the air resistance of the vehicle 20.

Further, the air discharged from the exhaust port 14b of the duct 14 is blocked by the upper grill shutter 31A and does not flow into the engine room 27 through the condenser 28 and the radiator 29 having a large air resistance, so that the duct 14 exists. As a result, the air resistance of the vehicle 20 becomes negligibly small.

On the other hand, when the vehicle 20 is stopped, the air around the high-temperature heat sink 11 installed in the heat-dissipating portion 14B of the duct 14 is heated, and the density of the air decreases, so that the heat-dissipating portion 14B of the duct 14 is used. An ascending air flow is induced, and the low-temperature outside air is sucked into the duct 14 from the intake port 14a and discharged from the exhaust port 14b by being induced by this air flow. Therefore, the vehicle 20 is inside the duct 14. The same air flow as when traveling is generated. Then, since the heat dissipation of the heat sink 11 is promoted by the natural air cooling by the air flowing in the duct 14, the temperature rise of each semiconductor light emitting element 6 is suppressed.

In the present embodiment, the exhaust port 14b of the duct 14 is located between the front grill 21 and the grill shutter 31 where the temperature is relatively low even when the vehicle 20 is stopped and hot air hardly wraps around the front of the vehicle 20. Therefore, hot air does not flow in from the exhaust port 14b of the duct 14 and flow back into the duct 14. Therefore, the heat dissipation performance of the heat sink 11 is not hindered by the hot air, the heat dissipation of the heat sink 11 is promoted by natural air cooling, and the temperature rise of each semiconductor light emitting element 6 is effectively suppressed.

By the way, in the warm-up operation with the vehicle 20 stopped, since the grill shutter 31 is closed, hot air from the engine room 27 does not flow in from the exhaust port 14b of the duct 14 and flow back into the duct 14. The heat dissipation performance of the heat sink 11 is not hindered by the hot air from the engine room 27.

Therefore, since the above effect can be obtained by a simple configuration without requiring a separate device such as a fan, the heat dissipation structure does not cause a significant increase in cost or complexity of the structure.

By the way, at the opening positions of the intake port 14a and the exhaust port 14b of the duct 14, the flow resistance from the intake port 14a to the exhaust port 14b is larger than the flow resistance from the exhaust port 14b to the intake port 14a with respect to the wind from the front of the vehicle. There is no limitation as long as it is set to be large.

The intake port 14a of the duct 14 may be located at a position lower than the exhaust port 14b, and as shown in FIG. 7, the intake port 14a may be opened in the lower grill 21B. Further, as shown in FIG. 8, even in the vehicle 20 provided with only the lower grill shutter 31B as the grill shutter 31, the intake port 14a of the duct 14 may be opened to the lower grill 21B, and as shown in FIG. 9, the exhaust port 14a may be opened. The mouth 14b may be opened between the grill shutter 31 and the condenser 28 in the front-rear direction of the vehicle.

In the configurations shown in FIGS. 8 and 9, the traveling wind discharged from the exhaust port 14b of the duct 14 when the vehicle 20 is traveling passes through the condenser 28 and the radiator 29 having a large air resistance and flows to the engine room 27. Since the opening area of the intake port 14a is smaller than the opening area of the front grill 21, the influence of the traveling wind flowing through the condenser 28 and the radiator 29 to the engine room 27 on the air resistance of the entire vehicle 20 is minor. be.

As shown in FIG. 10, an on-off valve 15 may be provided at the intake port 14a of the duct 14, and the on-off valve 15 may be controlled independently of the opening and closing of the grill shutter 31 by a control means (not shown). .. With this configuration, the opening area of the intake port 14a of the duct 14 is changed according to the temperature of the semiconductor light emitting element 6 which is a light source, and the increase in air resistance and the generation of noise during traveling of the vehicle 20 are minimized. The heat generated by the semiconductor light emitting element 6 can be efficiently dissipated by the heat sink 11.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIGS. 11 and 12. 11 and 12 are side sectional views of the front portion of the vehicle showing the heat dissipation structure of the vehicle lamp according to the second embodiment of the present invention, and in these views, those shown in FIGS. 6 to 9 are shown. The same elements are designated by the same reference numerals, and the description thereof will be omitted below.

The second embodiment is characterized in that the intake port 14a of the duct 14 is opened to the rear of the vehicle with respect to the grill shutter 31. In the example shown in FIG. 11, the exhaust port 14b of the duct 14 is also opened to the rear of the vehicle from the grill shutter 31, and in the example shown in FIG. 12, the exhaust port 14b of the duct 14 is opened to the front of the vehicle from the grill shutter 31. It is opened in.

As described above, if the intake port 14a of the duct 14 is opened to the rear of the vehicle with respect to the grill shutter 31, the effect of reducing the air resistance of the vehicle 20 when the grill shutter 31 is closed can be maximized. In particular, since it is not necessary to light the vehicle lamp 1 during daytime traveling and it is not necessary to dissipate heat from the semiconductor light emitting element 6 which is a light source, it is not necessary to take in the traveling wind from the intake port 14a of the duct 14. Further, as shown in FIG. 11, if one shielding plate 31a of the grill shutter 31 located near the intake port 14a of the duct 14 is individually opened and closed, the intake port 14a of the duct 14 is opened and closed by the grill shutter 31. It can be equipped with the function of an on-off valve.

Further, as shown in FIG. 12, the exhaust port 14b of the duct 14 is opened in front of the vehicle from the grill shutter 31, and one shielding plate 31a of the grill shutter 31 near the intake port 14a is individually opened and closed. Therefore, even when the vehicle 20 is traveling, the traveling wind does not flow to the engine room 27 through the condenser 28 and the radiator 29 having a large air resistance, so that the increase in the air resistance of the vehicle 20 can be suppressed.

In addition, the same effect as that of the first embodiment can be obtained in the present embodiment as well.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS. 13 to 15. 13 to 15 are side sectional views of the front part of the vehicle showing the heat dissipation structure of the vehicle lamp according to the third embodiment of the present invention, and these views are also shown in FIGS. 6 to 9. The same elements are designated by the same reference numerals, and the description thereof will be omitted below.

The third embodiment is characterized in that the intake port 14a of the duct 14 is opened to the bottom of the vehicle. Here, in the example shown in FIG. 13, the exhaust port 14b of the duct 14 is opened in front of the grill shutter 31 of the vehicle, and in the example shown in FIG. 14, the exhaust port 14b of the duct 14 is opened in front of the grill shutter 31. It is opened to the rear.

As described above, if the intake port 14a of the duct 14 is opened to the bottom of the vehicle, the effect that the heat dissipation structure does not impair the appearance of the vehicle can be obtained.

Further, in the example shown in FIG. 15, the intake ports 14a1 and 14a2 of the duct 14 are opened at the bottom of the vehicle and the lower grill shutter 31B, respectively, and although not shown, on-off valves are provided at the respective intake ports 14a1 and 14a2 to open and close them. The valve is opened and closed according to the traveling state of the vehicle 20 by a control means (not shown). In this example, the exhaust port 14b of the duct 14 is opened in front of the vehicle of the grill shutter 31.

Therefore, if the on-off valves provided in the two intake ports 14a1 and 14a2 of the duct 14 are opened and closed according to the traveling state of the vehicle 20 as described above, the lower grill shutter 31B opens when the vehicle is stopped. In the state, the intake port 14a1 that opens at the bottom of the vehicle is closed, the intake port 14a2 in front of the vehicle where the ambient air temperature is low is opened, and the outside air is sucked into the duct 14 from the intake port 14a2. When the shutter 31B is closed, the intake port 14a2 that opens in front of the vehicle can be closed, and the intake port 14a1 that opens in the bottom of the vehicle can be opened to suppress an increase in air resistance of the vehicle 20.

In addition, the same effect as that of the first embodiment can be obtained in the present embodiment as well.

Although the embodiment in which the present invention is applied to the heat dissipation structure of the vehicle lamp used as the headlamp has been described above, the present invention also applies to the heat dissipation structure of any vehicle lamp other than the headlamp. Of course, it is also applicable. Further, in the present embodiment, the blue LED is used as the semiconductor light emitting element, but other semiconductor light emitting elements such as LEDs and lasers other than the blue LED can be used as the light source.

1 Vehicle lighting equipment 2 Housing 3 Outer lens 4 Lighting room 5 Lamp module 6 Semiconductor light emitting element (light source)
7 Extension 8 Transmission fiber 9 Fluorescent material 10 Lens 11 Heat sink (heat sink)
11a Heat dissipation base 11b Heat dissipation fin 12 Board 13 Heat dissipation base 14 Duct 14A Duct intake part 14B Duct heat dissipation part 14C Duct exhaust part 14a Duct intake port 14b Duct exhaust port 15 On-off valve 20 Vehicle 21 Front grill 21A Upper grill 21B Lower grill 22 Front bumper 23 Bonnet 24 Front glass 25 Front wheel 26 Side mirror 27 Engine room 28 Condenser 29 Radiator 30 Radiator fan 31 Grill shutter 31A Upper grill shutter 31B Lower grill shutter 31a Grill shutter shielding plate

Claims (3)

For vehicles equipped with an openable and closable grill shutter located behind the front grille located at the front end and in front of the engine room, and equipped with a light source and a radiator that dissipates heat generated by the light source. It is a heat dissipation structure of the lamp
The radiator is internally provided in the heat-dissipating portion of a duct having an intake portion whose one end opens as an intake port, a heat-dissipating portion extending in the vertical direction, and an exhaust portion whose other end opens as an exhaust port. In the heat dissipation structure of a vehicle lamp that cools the light source by promoting heat dissipation of the radiator by the air flowing into the air exhaust port and being discharged from the exhaust port.
At least one of the intake port and the exhaust port of the duct is opened between the front grill and the engine room in the front-rear direction of the vehicle.
The intake port of the duct is a heat radiating structure for a vehicle lamp, characterized in that the intake port is opened to the rear of the vehicle with respect to the grill shutter. The heat dissipation of a vehicle lamp according to claim 1, wherein an on-off valve is provided at an intake port of the duct, and a control means for controlling the opening and closing of the on-off valve independently of the opening and closing of the grill shutter is provided. structure. For vehicles equipped with an openable and closable grill shutter located behind the front grille located at the front end and in front of the engine room, and equipped with a light source and a radiator that dissipates heat generated by the light source. It is a heat dissipation structure of the lamp
The radiator is internally provided in the heat-dissipating portion of a duct having an intake portion whose one end opens as an intake port, a heat-dissipating portion extending in the vertical direction, and an exhaust portion whose other end opens as an exhaust port. In the heat dissipation structure of a vehicle lamp that cools the light source by promoting heat dissipation of the radiator by the air flowing into the air exhaust port and being discharged from the exhaust port.
At least one of the intake port and the exhaust port of the duct is opened between the front grill and the engine room in the front-rear direction of the vehicle.
A heat dissipation structure for a vehicle lamp, characterized in that an on-off valve is provided at an intake port of the duct, and the on-off valve is composed of a part of the grill shutter.

Images