Ventilated heat-dissipating automobile lamp and use control method

Abstract

This invention discloses a ventilated and heat-dissipating automotive lamp and its control method, including a lamp body and a flow guiding assembly. The lamp body has an LED light-emitting group located on the front side and a heat dissipation duct in the middle of the lamp body. The flow guiding assembly includes a flow guiding plate located on the rear side of the lamp body and a flow guiding drive mechanism for driving the flow guiding plate to move back and forth. A flow guiding column extending forward into the heat dissipation duct is located in the middle of the front side of the flow guiding plate. The flow guiding column is a tapered column structure with an outer diameter that gradually increases from front to back. The flow guiding drive mechanism drives the flow guiding plate to move backward so that the inner peripheral wall of the heat dissipation duct and the outer peripheral wall of the flow guiding column form an annular first heat dissipation channel. The front side of the flow guiding plate and the rear end of the lamp body form a heat dissipation gap communicating with the first heat dissipation channel. Convection heat dissipation can be achieved on the inner peripheral side, outer peripheral side, front end, and rear end of the lamp body. Under the drive of the flow guiding drive mechanism, the flow area of ​​the heat dissipation duct and the first heat dissipation channel is adjusted to regulate the heat dissipation effect and wind resistance according to the heat of the lamp and the driving speed of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting, and in particular to a ventilated and heat-dissipating automotive lighting fixture and its control method. Background Technology

[0002] Cars are an indispensable means of transportation in our lives, and car lights are one of the most important components, used very frequently. Most car lights now use LED light sources. LEDs generate a lot of heat during use, and if not dissipated in time, they will rapidly decay in brightness, shorten their lifespan, and may even spontaneously combust. Current technology generally uses radiators for heat dissipation. Some radiators are equipped with cooling fans for active cooling, but adding fans requires a lot of space, consumes a lot of energy, and has a high failure rate. Other radiators rely on the airflow from the moving car to improve cooling, but this type of headlight has high wind resistance, a complex structure, poor waterproofing, and its cooling effect is affected by the car's speed, making it unsuitable for all situations. Summary of the Invention

[0003] The purpose of this invention is to provide a ventilated and heat-dissipating automotive lighting fixture and its usage control method, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0005] Firstly, this invention provides a ventilated and heat-dissipating automotive lamp, comprising: a lamp body and a flow guiding assembly. The lamp body has an LED light-emitting group located on the front side, and a heat dissipation duct running through the front and rear of the lamp body is provided in the middle of the lamp body. The LED light-emitting group is arranged around the front port of the heat dissipation duct. The flow guiding assembly includes a flow guiding plate located on the rear side of the lamp body and a flow guiding drive mechanism for driving the flow guiding plate to move back and forth. A flow guiding column extending forward into the heat dissipation duct is provided in the middle of the front side of the flow guiding plate. The flow guiding column is a tapered column structure with an outer diameter that gradually increases from front to back.

[0006] The flow guiding mechanism drives the flow guide plate to move backward so that the inner peripheral wall of the heat dissipation duct and the outer peripheral wall of the flow guide column form an annular first heat dissipation channel, and the front side of the flow guide plate and the rear end of the lamp body form a heat dissipation gap that communicates with the first heat dissipation channel.

[0007] The beneficial effects of this automotive lamp are as follows: A heat dissipation duct is set in the middle of the lamp body, and the LED light-emitting group is arranged around the heat dissipation duct. In use, the lamp is generally installed at the front and rear of the car. When the car is moving, the airflow flows from front to back through the heat dissipation duct to carry away the heat on the inner periphery of the LED light-emitting group, while the heat on the outer periphery of the LED light-emitting group is carried away by the airflow on the outer periphery of the lamp. A deflector is also set on the rear side of the lamp body. The deflector can move back and forth under the drive of the deflector driving mechanism. When the deflector moves backward, the outer periphery of the deflector column extending into the heat dissipation duct at the middle of the front side of the deflector and the inner periphery of the heat dissipation duct form a first heat dissipation channel. The front side of the deflector and the rear end of the lamp body form a heat dissipation gap that communicates with the first heat dissipation channel. In this way, the airflow of the heat dissipation duct will flow along the first heat dissipation channel. The airflow flows through the channel and the heat dissipation gap. The guide column is a conical column structure, with its outer peripheral wall being a conical surface. The airflow flows outward along the outer conical surface of the guide column, allowing it to exit from the rear end of the heat dissipation duct and flow outward along the heat dissipation gap, carrying away the heat from the rear end of the lamp body. This achieves convective heat dissipation on the inner, outer, front, and rear sides of the lamp body, improving the lamp's heat dissipation effect. Furthermore, the conical column structure reduces wind resistance. Opening a heat dissipation duct in the middle of the lamp body makes the structure more compact and simple, increasing the heat dissipation area. Driven by the guide drive mechanism, the front and rear positions of the guide plate can be adjusted to regulate the flow area of ​​the heat dissipation duct and the first heat dissipation channel. This allows for adjustment of the heat dissipation effect and wind resistance based on the lamp's heat and the vehicle's speed.

[0008] The flow guiding mechanism can drive the flow guide plate forward to block the rear port of the heat dissipation air duct. This is mainly to prevent the car lights from freezing in extremely cold weather and to reduce the convective heat exchange between the airflow and the car lights. This can reduce the heat exchange effect and allow the car lights to work at a relatively suitable temperature as much as possible.

[0009] As a further improvement to the above technical solution, a heat sink is provided at the rear end of the lamp body, and the guide plate is located on the rear side of the heat sink. The heat sink includes a number of heat dissipation fins arranged in a ring with the central axis of the lamp body as the center, and a second heat dissipation channel is formed between two adjacent heat dissipation fins.

[0010] To further improve heat dissipation, this solution includes a heat sink at the rear of the lamp body. The heat generated by the LED light-emitting group is transferred to the heat sink, which expands the heat dissipation area through several heat dissipation fins. At the same time, the heat dissipation fins form multiple secondary heat dissipation channels for airflow, thereby forming convection heat transfer and improving the heat dissipation effect.

[0011] As a further improvement to the above technical solution, the second heat dissipation channel is provided with an air inlet located on the inner peripheral wall of the rear end of the heat dissipation duct and an air outlet located on the outer peripheral side of the automotive lamp. The air inlet is located on the inner peripheral wall of the rear end of the heat dissipation duct. In this way, when the airflow flows outward along the outer peripheral conical surface of the guide column, part of the airflow can flow into the second heat dissipation channel through the air inlet and then flow out from the outer peripheral side of the air outlet, so that the airflow can form convective heat transfer in the second heat dissipation channel, carry away the heat of the heat dissipation fins, and improve the heat dissipation effect.

[0012] As a further improvement to the above technical solution, the radiator also includes a front plate seat and a rear plate seat integrally formed on the front and rear sides of a plurality of heat dissipation fins, respectively. The heat dissipation fins are spiral plate structures, so that the second heat dissipation channel is spirally arranged along the axial and radial directions of the automotive lamp.

[0013] To improve the structural strength of the radiator and prevent the heat dissipation fins from bending and deforming, the heat dissipation fins are fixed between the front and rear plate bases. This also increases the heat exchange area. The second heat dissipation channel has a spiral channel structure, which makes the airflow travel longer and further improves the heat exchange effect.

[0014] As a further improvement to the above technical solution, the gap between two adjacent heat dissipation fins gradually increases from the air inlet to the air outlet. A guide vane that follows the spiral bending of the second heat dissipation channel is provided in the middle of the air outlet. The front and rear sides of the guide vane are fixed to the front plate seat and the rear plate seat, respectively.

[0015] The flow area of ​​the second heat dissipation channel gradually increases, which reduces the flow resistance of the airflow. At the same time, the guide vanes set in the air outlet can improve the airflow guiding effect, increase the heat exchange area, and improve the overall structural strength of the radiator.

[0016] As a further improvement to the above technical solution, the heat dissipation air duct includes a front air duct and a rear air duct connected front to back. The inner diameter of the front air duct gradually decreases from front to back, and the inner diameter of the rear air duct gradually increases from front to back. The air inlet is located on the inner wall of the rear air duct. The guide column includes a front column and a rear column connected front to back. Both the front column and the rear column are conical. The taper of the outer peripheral wall of the rear column is smaller than that of the front column. The rear column can be fitted into the rear air duct to block the air inlet.

[0017] The cooling duct in this design is a variable diameter channel. The front duct is a forward-facing trumpet-shaped structure, which can guide the airflow and make it converge towards the center. The front column is a conical structure, which can guide the airflow outward and diffuse it. This reduces wind resistance and allows the airflow to converge before entering the rear duct. After entering the rear duct, the airflow diffuses outward under the guidance of the inclined conical surface on the outer periphery of the rear column. This causes some of the airflow to enter the surrounding air inlets, while the other part of the airflow enters the cooling gap and flows and diffuses in all directions. The rear column can be fitted into the rear air duct to block the air inlet. This is equivalent to the flow guiding mechanism driving the flow guide plate forward until the rear column is fitted into the rear air duct, thus blocking the rear port of the heat dissipation air duct and the air inlet. At this time, the two airflows flowing along the inner peripheral wall of the front air duct and the outer peripheral wall of the front column will cancel each other out, resulting in the lowest heat dissipation effect. In cold winter areas, it is also necessary to keep the lamps operating at a suitable temperature. Too low a temperature can also cause failure of internal electrical components.

[0018] As a further improvement to the above technical solution, the LED light-emitting group includes a lampshade that covers the front end of the lamp body and is in the shape of a ring, a lamp plate that is disposed inside the front end of the lamp body and is in the shape of a ring, and a lens located on the front side of the lamp plate. The front side of the lampshade is an arc-shaped convex surface.

[0019] The light emitted by the LEDs on the lamp panel in this design is projected forward through a lens, thereby improving the lighting effect. The front of the lampshade is convex, which reduces wind resistance and guides the airflow, causing it to flow backward along the inner and outer circumferences of the lampshade.

[0020] As a further improvement to the above technical solution, a number of guide posts extending forward and backward are fixed on the rear side of the radiator, and the guide plate is provided with sliding holes that slide in cooperation with the guide posts.

[0021] The air deflector can slide back and forth through the sliding cooperation of several guide posts and sliding holes, which improves the stability of the air deflector movement, prevents the air deflector from tilting, and makes the airflow in the heat dissipation gap flow more evenly to all sides, avoiding excessive local temperature difference.

[0022] As a further improvement to the above technical solution, the flow guiding drive mechanism includes an electromagnetic coil fixed in the lamp body and a magnetic part disposed on the flow guiding plate. When the electromagnetic coil is energized, it generates an electromagnetic force that is the same or opposite to the magnetic part, so as to drive the flow guiding plate to move backward or forward.

[0023] This solution takes into account the high waterproofing requirements of automotive lights. It uses an electromagnetic field generated by energizing an electromagnetic coil to drive the movement of the air deflector. Depending on the actual needs, a set current can be input to the electromagnetic coil during vehicle operation. This coil then generates a set electromagnetic force, which attracts or repels the magnetic component on the air deflector, causing it to move back and forth to a predetermined position to adjust the airflow area for heat dissipation. The electromagnetic field enables contactless force transmission, and the electromagnetic coil can be installed inside the lamp body. This reduces the waterproofing requirements of the automotive lights and simplifies the overall structure. The magnetic component can be installed in different ways: either the air deflector and the magnetic component are integrated (the air deflector is a magnetic component), or the magnetic component is separate from the air deflector, with the magnetic component fixed to the air deflector.

[0024] As a further improvement to the above technical solution, a reset elastic element is provided between the guide plate and the heat sink to allow the guide plate to move backward or forward to reset.

[0025] This design incorporates a reset elastic element to drive the guide plate to reset. In this case, the electromagnetic coil only needs to generate an electromagnetic field in one direction. If the reset elastic element pushes the guide plate backward to reset, the electromagnetic force generated by the electromagnetic coil will drive the guide plate forward; if the reset elastic element pushes the guide plate forward to reset, the electromagnetic force generated by the electromagnetic coil will drive the guide plate backward.

[0026] Furthermore, the present invention also provides a method for controlling the use of the aforementioned automotive lighting fixtures, wherein the reset elastic element provides a resetting force to the guide plate to reset forward, and the electromagnetic coil is energized to generate an electromagnetic force of the same polarity as the magnetic part. The specific method is as follows:

[0027] The operating temperature of the LED light-emitting group and the driving speed of the car are detected in real time. Based on the operating temperature and the driving speed of the car, a set current is passed through the electromagnetic coil. Under the action of electromagnetic force and the reset elastic element, the guide plate is driven to float back and forth to adjust the heat dissipation gap and the flow area of ​​the first heat dissipation channel.

[0028] When the operating temperature is higher than the set high value T1 or the vehicle speed is higher than the set high value V1, a set high value current I1 is passed through the electromagnetic coil. The repulsive electromagnetic force drives the guide plate to move backward so that the first heat dissipation channel is connected to the heat dissipation gap and the second heat dissipation channel at the same time.

[0029] When the operating temperature is lower than the set low value T2, the electromagnetic coil is de-energized. Under the action of the reset elastic element, the guide plate moves forward to contact the rear side of the heat sink to block the heat dissipation airflow.

[0030] The beneficial effects of this invention are as follows: When the automotive lighting fixture of this technology is in use, the electromagnetic force generated by energizing the electromagnetic coil drives the guide plate to move back and forth and reset. This allows the front and rear positions of the guide plate to be adjusted according to the operating temperature of the LED light-emitting group and the vehicle's speed, thereby adjusting the flow area of ​​the heat dissipation gap and the first heat dissipation channel, and simultaneously controlling the opening and closing of the heat dissipation air duct. Specifically, when the operating temperature of the LED light-emitting group is higher than a set high value T1 or the vehicle's speed is higher than a set high value V1, the automotive lighting fixture urgently needs cooling and wind resistance reduction, so the guide plate moves backward to facilitate the first heat dissipation... The channel is simultaneously connected to the heat dissipation gap and the second heat dissipation channel. At this time, the reset elastic element stores energy. When the operating temperature of the automotive lamp is lower than the set low value T2, the guide plate moves forward under the reset elastic force of the reset elastic element, blocking the heat dissipation air duct. The heat dissipation air duct of this technology is set in the middle of the lamp body, which can make the structure more compact and simple, and increase the heat dissipation area. Under the drive of the guide drive mechanism, the front and rear positions of the guide plate can be adjusted to adjust the flow area of ​​the heat dissipation air duct and the first heat dissipation channel. In this way, the heat dissipation effect and wind resistance can be adjusted according to the heat of the lamp and the driving speed of the car. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0032] Figure 1 This is a side cross-sectional view of an embodiment of the automotive lighting fixture provided by the present invention.

[0033] Figure 2 This is a cross-sectional view of an embodiment of the heat sink provided by the present invention;

[0034] Figure 3 This is a rear view of an embodiment of the automotive lighting fixture provided by the present invention;

[0035] Figure 4 This is a schematic diagram of an embodiment of the automotive lighting fixture provided by the present invention. Detailed Implementation

[0036] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0038] In the description of this invention, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0039] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0040] Reference Figures 1-4 The ventilation and heat dissipation type automotive lamp of the present invention is provided in the following embodiment:

[0041] The automotive lighting fixture of this embodiment includes: lamp body 100 and airflow guide assembly 300.

[0042] The lamp body 100 has a heat dissipation duct 110 in the middle, which extends and runs through the front and back. An LED light-emitting group 200 is provided on the front side of the lamp body 100.

[0043] The LED light-emitting group 200 is arranged around the front port of the heat dissipation duct 110. Specifically, the LED light-emitting group 200 in this embodiment includes a lamp cover 210 covering the front end of the lamp body 100, a lamp plate 220 disposed inside the front end of the lamp body 100, and a lens 230 disposed on the front side of the lamp plate 220. The lamp plate 220 and the lamp cover 210 are both ring-shaped. The lamp cover 210 covers the lamp plate 220 and the lens 230, which has a waterproof effect. The light emitted by the LEDs on the lamp plate 220 will shine forward through the lens 230, thereby improving the lighting effect.

[0044] Furthermore, the front of the lampshade 210 adopts an arc-shaped convex surface, which can reduce wind resistance and guide the airflow. The airflow will flow backward along the inner and outer circumferences of the lampshade 210.

[0045] The airflow guiding assembly 300 includes an airflow guiding plate 310 disposed on the rear side of the lamp body 100, an airflow guiding drive mechanism that drives the airflow guiding plate 310 to slide back and forth, an airflow guiding column 320 disposed in the middle of the front side of the airflow guiding plate 310, the airflow guiding column 320 extending forward into the heat dissipation duct 110, and the airflow guiding column 320 having a tapered column structure with the outer diameter of the tapered column structure gradually increasing from front to back, the airflow guiding drive mechanism driving the airflow guiding plate 310 to move backward, so that the inner peripheral wall of the heat dissipation duct 110 and the outer peripheral wall of the airflow guiding column 320 form an annular first heat dissipation channel 400, and the front side of the airflow guiding plate 310 and the rear end of the lamp body 100 form a heat dissipation gap 500 communicating with the first heat dissipation channel 400.

[0046] In this embodiment, a heat dissipation duct 110 is provided in the middle of the lamp body 100, and the LED light-emitting group 200 is arranged around the heat dissipation duct 110. In use, the lamp is generally installed at the front and rear of a car. When the car is moving, airflow flows from front to back through the heat dissipation duct 110 to carry away the heat from the inner periphery of the LED light-emitting group 200, while the heat from the outer periphery of the LED light-emitting group 200 is carried away by the airflow from the outer periphery of the lamp. A guide plate 310 is also provided at the rear of the lamp body 100. The guide plate 310 can move back and forth under the drive of a guide drive mechanism. When the guide plate 310 moves rearward, the outer periphery of the guide column 320 extending into the heat dissipation duct 110 at the middle of the front side of the guide plate 310 forms a first heat dissipation channel 400 with the inner periphery of the heat dissipation duct 110. A heat dissipation gap 500 communicating with the first heat dissipation channel 400 is formed between the front side of the guide plate 310 and the rear end of the lamp body 100. Thus, the airflow in the heat dissipation duct 110... The airflow flows along the first heat dissipation channel 400 and the heat dissipation gap 500. The guide column 320 is a conical column structure, so that the outer peripheral wall of the guide column 320 is a conical surface structure. The airflow will flow outward along the outer conical surface of the guide column 320, so that the airflow comes out from the rear end of the heat dissipation duct 110 and flows around along the heat dissipation gap 500, carrying away the heat from the rear end of the lamp body 100. In this way, convection heat dissipation can be achieved on the inner peripheral side, outer peripheral side, front end and rear end of the lamp body 100 to improve the heat dissipation effect of the lamp. Furthermore, under the guidance of the conical column structure guide column 320, the wind resistance can be reduced. Opening the heat dissipation duct 110 in the middle of the lamp body 100 can make the structure more compact and simple, and increase the heat dissipation area. Under the drive of the guide drive mechanism, the front and rear positions of the guide plate 310 can be adjusted to adjust the flow area of ​​the heat dissipation duct 110 and the first heat dissipation channel 400. In this way, the heat dissipation effect and wind resistance can be adjusted according to the heat of the lamp and the driving speed of the car.

[0047] In this embodiment, the flow guiding mechanism can also drive the flow guide plate 310 forward to block the rear port of the heat dissipation duct 110. This is mainly to prevent the car lights from freezing in extremely cold weather and to reduce the convective heat exchange between the airflow and the car lights. This can reduce the heat exchange effect and make the car lights work at a relatively suitable temperature as much as possible.

[0048] Furthermore, to further improve the heat dissipation effect, a heat sink 600 is provided at the rear end of the lamp body 100. The heat generated by the LED light-emitting group 200 is transferred to the heat sink 600. The guide plate 310 is provided on the rear side of the heat sink 600. The heat sink 600 includes a plurality of heat dissipation fins 610, which are arranged in a ring with the central axis of the lamp body 100 as the center. A second heat dissipation channel 620 is formed between two adjacent heat dissipation fins 610. The heat sink 600 expands the heat dissipation area through the plurality of heat dissipation fins 610. At the same time, the plurality of heat dissipation fins 610 form multiple second heat dissipation channels 620 for airflow to form convection heat transfer and improve the heat dissipation effect.

[0049] More specifically, the radiator 600 also includes a front plate seat 630 and a rear plate seat 640 integrally formed on the front and rear sides of a plurality of heat dissipation fins 610, respectively. The front plate seat 630 has an annular lamp groove at its front end. In this embodiment, the lamp cover 210 covers the front end of the annular lamp groove, while the lamp plate 220 and the lens 230 are disposed in the annular lamp groove. At the same time, a tube body is also disposed in the middle between the front plate seat 630 and the rear plate seat 640, and the heat dissipation air duct 110 is formed in the tube body. This can improve the structural strength of the radiator 600 and prevent the heat dissipation fins 610 from bending and deforming. The heat dissipation fins 610 are fixed between the front plate seat 630 and the rear plate seat 640, which also increases the heat exchange area.

[0050] The second heat dissipation channel 620 is provided with an air inlet 621 on the inner peripheral wall of the rear end of the heat dissipation duct 110 and an air outlet 622 on the outer peripheral side of the automotive lamp. The air inlet 621 is located on the inner peripheral wall of the rear end of the heat dissipation duct 110. When the airflow flows outward along the outer peripheral conical surface of the guide column 320, part of the airflow can flow into the second heat dissipation channel 620 through the air inlet 621 and then flow out from the outer peripheral side of the air outlet 622. This allows the airflow to form convective heat transfer in the second heat dissipation channel 620, carrying away the heat from the heat dissipation fins 610 and improving the heat dissipation effect.

[0051] The heat dissipation fins 610 adopt a spiral fin structure, which makes the second heat dissipation channel 620 spirally arranged along the axial and radial directions of the automotive lamp. The spiral channel structure of the second heat dissipation channel 620 makes the airflow travel longer and further improves the heat exchange effect.

[0052] Furthermore, the spacing between two adjacent heat dissipation fins 610 gradually increases from the air inlet 621 to the air outlet 622. A guide vane 650, which follows the spiral bending of the second heat dissipation channel 620, is provided in the middle of the air outlet 622. The front and rear edges of the guide vane 650 are fixed to the front plate seat 630 and the rear plate seat 640, respectively. In this embodiment, the flow area of ​​the second heat dissipation channel 620 gradually increases, which can reduce the flow resistance of the airflow. At the same time, the guide vane 650 provided in the air outlet 622 can improve the airflow guiding effect, increase the heat exchange area, and improve the overall structural strength of the radiator 600.

[0053] Furthermore, the heat dissipation duct 110 in this embodiment includes a front duct 111 and a rear duct 112 connected in sequence. The inner diameter of the front duct 111 gradually decreases from front to back, and the inner diameter of the rear duct 112 gradually increases from front to back. The air inlet 621 is disposed on the inner wall of the rear duct 112. The guide column 320 includes a front column 321 and a rear column 322 connected in sequence. Both the front column 321 and the rear column 322 are conical. The taper of the outer peripheral wall of the rear column 322 is smaller than that of the front column 321.

[0054] In this embodiment, the heat dissipation duct 110 is configured as a variable diameter channel. The front duct 111 is a forward-facing trumpet-shaped structure, which can guide the airflow and make the airflow converge towards the center. The front column 321 is a positive cone-shaped structure, which can guide the airflow outward and diffuse it. This can reduce wind resistance and allow the airflow to converge before entering the rear duct 112. After entering the rear duct 112, under the guidance of the inclined cone surface on the outer periphery of the rear column 322, the airflow diffuses outward, so that part of the airflow enters the surrounding air inlets 621, while another part of the airflow enters the heat dissipation gap 500 and flows and diffuses in all directions.

[0055] In this embodiment, the rear column 322 can be fitted into the rear air duct 112, thus blocking the air inlet 621. This is equivalent to the flow guiding mechanism driving the flow guide plate 310 forward until the rear column 322 is fitted into the rear air duct 112, thereby blocking the rear port of the heat dissipation air duct 110 and the air inlet 621. At this time, the two airflows flowing along the inner peripheral wall of the front air duct 111 and the outer peripheral wall of the front column 321 will cancel each other out, resulting in the lowest heat dissipation effect. In cold winter places, it is also necessary to keep the lamps operating at a suitable temperature. Too low a temperature will also cause failure of the internal electrical components.

[0056] In this embodiment, a plurality of guide posts 660 are provided on the rear side of the radiator 600. The guide posts 660 are arranged in a ring at intervals and extend back and forth. The guide plate 310 is provided with sliding holes 311 that slide with the guide posts 660. The guide plate 310 can slide back and forth under the sliding cooperation of the guide posts 660 and the sliding holes 311, which improves the stability of the movement of the guide plate 310, prevents the guide plate 310 from tilting, and makes the airflow in the heat dissipation gap 500 flow more evenly to all sides, avoiding the occurrence of excessive local temperature difference.

[0057] The flow guiding mechanism of this embodiment includes an electromagnetic coil 700 installed inside the lamp body 100 and a magnetic part provided on the flow guiding plate 310. When the electromagnetic coil 700 is energized, it generates an electromagnetic force that is the same as or opposite to the magnetic part, thereby driving the flow guiding plate 310 to move backward or forward.

[0058] This embodiment considers the high waterproof performance requirements of automotive lights. It uses an electromagnetic field generated by energizing an electromagnetic coil 700 to drive the movement of the air deflector 310. Depending on actual needs, during vehicle operation, a set current can be input to the electromagnetic coil 700, causing it to generate a set electromagnetic force. This force attracts or repels the magnetic part on the air deflector 310, moving it back and forth to a set position to adjust the airflow area for heat dissipation. The electromagnetic field enables contactless force transmission. The electromagnetic coil 700 can be installed inside the lamp body 100, reducing the waterproof design requirements of the automotive lights and simplifying the overall structure. The magnetic part can be installed in different ways: either the air deflector 310 and the magnetic part are integrated, meaning the air deflector 310 is a magnetic component; or the magnetic part is separate from the air deflector 310, with the magnetic part fixed to the air deflector 310.

[0059] Furthermore, a reset elastic element is provided between the guide plate 310 and the heat sink 600 to allow the guide plate 310 to move backward or forward to reset. In this embodiment, a reset elastic element is provided to drive the guide plate 310 to reset. At this time, the electromagnetic coil 700 only needs to generate an electromagnetic field in one direction. If the reset elastic element pushes the guide plate 310 to move backward to reset, the electromagnetic force generated by the electromagnetic coil 700 will drive the guide plate 310 to move forward; if the reset elastic element pushes the guide plate 310 to move forward to reset, the electromagnetic force generated by the electromagnetic coil 700 will drive the guide plate 310 to move backward.

[0060] Specifically, in this embodiment, the reset elastic element provides a reset force to the guide plate 310 to reset forward. The electromagnetic coil 700 is energized to generate an electromagnetic force with the same polarity as the magnetic part. In this embodiment, the reset elastic element is a spring, and the above-mentioned spring is sleeved on the outer periphery of each guide post 660. A limit block is provided at the rear end of the guide post 660. The front and rear ends of the spring abut against the rear end face of the guide plate 310 and the limit block, respectively.

[0061] The guide post 660 can be bolted. The guide post 660 passes through the sliding hole 311 from back to front and is threaded to the rear end of the radiator 600. This allows for adjustment of the spring's reset force on the guide plate 310, improving adjustability.

[0062] This embodiment also provides a method for controlling the use of the above-mentioned automotive lighting fixtures, the specific method of which is as follows:

[0063] The operating temperature of the LED light-emitting group 200 and the driving speed of the car are detected in real time by temperature and speed sensors. The main controller supplies a set current to the electromagnetic coil 700 according to the operating temperature and the driving speed of the car. Under the action of electromagnetic force and the reset elastic element, the guide plate 310 is driven to float back and forth to adjust the flow area of ​​the heat dissipation gap 500 and the first heat dissipation channel 400.

[0064] When the operating temperature is higher than the set high value T1 or the vehicle speed is higher than the set high value V1, a set high value current I1 is passed through the electromagnetic coil 700. The repulsive electromagnetic force pushes the guide plate 310 to move backward, so that the first heat dissipation channel 400 is connected to the heat dissipation gap 500 and the second heat dissipation channel 620 at the same time. This also increases the flow area of ​​the heat dissipation gap 500 and the first heat dissipation channel 400, thereby improving the airflow.

[0065] When the operating temperature is lower than the set low value T2, the electromagnetic coil 700 is de-energized. Under the action of the reset elastic element, the guide plate 310 is reset forward to abut against the rear side of the heat sink 600 to block the heat dissipation air passage 110.

[0066] When the automotive lights are in use, the electromagnetic force generated by energizing the electromagnetic coil 700 drives the guide plate 310 to move back and forth and reset. This allows the position of the guide plate 310 to be adjusted according to the operating temperature of the LED light-emitting group 200 and the vehicle's speed, thereby adjusting the flow area of ​​the heat dissipation gap 500 and the first heat dissipation channel 400, and simultaneously controlling the opening and closing of the heat dissipation duct 110. Specifically, when the operating temperature of the LED light-emitting group 200 exceeds a set high value T1 or the vehicle's speed exceeds a set high value V1, the automotive lights urgently need cooling and reduced wind resistance. In this case, the guide plate 310 moves backward to allow the first heat dissipation channel 400 to simultaneously... The heat dissipation gap 500 and the second heat dissipation channel 620 are connected. At this time, the reset elastic element stores energy. When the working temperature of the automotive lamp is lower than the set low value T2, under the action of the reset elastic element, the guide plate 310 moves forward and blocks the heat dissipation air duct 110. The heat dissipation air duct 110 of this technology is set in the middle of the lamp body 100, which can make the structure more compact and simple and increase the heat dissipation area. Under the drive of the guide drive mechanism, the front and rear positions of the guide plate 310 can be adjusted to adjust the flow area of ​​the heat dissipation air duct 110 and the first heat dissipation channel 400. In this way, the heat dissipation effect and wind resistance can be adjusted according to the heat of the lamp and the driving speed of the car.

[0067] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A ventilated and heat-dissipating automotive lamp, characterized in that: It includes: The lamp body (100) is provided with an LED light-emitting group (200) located on the front side. A heat dissipation duct (110) is provided in the middle of the lamp body (100) and the LED light-emitting group (200) is arranged around the front port of the heat dissipation duct (110). The airflow guiding assembly (300) includes an airflow guiding plate (310) located on the rear side of the lamp body (100) and an airflow guiding drive mechanism for driving the airflow guiding plate (310) to move back and forth. An airflow guiding column (320) extending forward into the heat dissipation air duct (110) is provided in the middle of the front side of the airflow guiding plate (310). The airflow guiding column (320) is a tapered column structure with an outer diameter that gradually increases from front to back. The flow guiding mechanism drives the flow guide plate (310) to move backward so that the inner peripheral wall of the heat dissipation duct (110) and the outer peripheral wall of the flow guide column (320) form an annular first heat dissipation channel (400). The front side of the flow guide plate (310) and the rear end of the lamp body (100) form a heat dissipation gap (500) that communicates with the first heat dissipation channel (400). A radiator (600) is provided at the rear end of the lamp body (100). The guide plate (310) is located on the rear side of the radiator (600). The radiator (600) includes a plurality of heat dissipation fins (610) arranged in a ring with the central axis of the lamp body (100) as the center. A second heat dissipation channel (620) is formed between two adjacent heat dissipation fins (610). The second heat dissipation channel (620) is provided with an air inlet (621) on the inner peripheral wall of the rear end of the heat dissipation duct (110) and an air outlet (622) on the outer peripheral side of the automotive lamp. The flow guiding drive mechanism can drive the flow guide plate (310) to move forward to abut against the rear of a number of heat dissipation fins (610) so that the flow guide column (320) blocks the air inlet (621). The heat dissipation duct (110) includes a front duct (111) and a rear duct (112) connected front to back. The inner diameter of the front duct (111) gradually decreases from front to back, and the inner diameter of the rear duct (112) gradually increases from front to back. The air inlet (621) is located on the inner wall of the rear duct (112). The guide column (320) includes a front column (321) and a rear column (322) connected front to back. Both the front column (321) and the rear column (322) are conical. The taper of the outer peripheral wall of the rear column (322) is smaller than that of the front column (321). The rear column (322) can be fitted into the rear duct (112) to block the air inlet (621). The radiator (600) has a number of guide posts (660) extending forward and backward fixed on the rear side, and the guide plate (310) is provided with sliding holes (311) that slide with the guide posts (660). The flow guiding drive mechanism includes an electromagnetic coil (700) fixed inside the lamp body (100) and a magnetic part provided on the flow guide plate (310). When the electromagnetic coil (700) is energized, it generates an electromagnetic force that is the same or opposite to the magnetic part, so as to drive the flow guide plate (310) to move backward or forward. A reset elastic element is provided between the guide plate (310) and the heat sink (600) to allow the guide plate (310) to move backward or forward to reset.

2. The ventilated and heat-dissipating automotive lamp according to claim 1, characterized in that: The radiator (600) also includes a front plate seat (630) and a rear plate seat (640) integrally formed on the front and rear sides of a plurality of heat dissipation fins (610), respectively. The heat dissipation fins (610) have a spiral plate structure, so that the second heat dissipation channel (620) is spirally arranged along the axial and radial directions of the automotive lamp.

3. The ventilated and heat-dissipating automotive lamp according to claim 2, characterized in that: The gap between two adjacent heat dissipation fins (610) gradually increases from the air inlet (621) to the air outlet (622). A guide plate (650) is provided in the middle of the air outlet (622) to follow the spiral bending of the second heat dissipation channel (620). The front and rear sides of the guide plate (650) are fixed to the front plate seat (630) and the rear plate seat (640) respectively.

4. The ventilated and heat-dissipating automotive lamp according to claim 1, characterized in that: The LED light-emitting group (200) includes a lampshade (210) that covers the front end of the lamp body (100) and is in the shape of an annular shape, a lamp plate (220) that is disposed inside the front end of the lamp body (100) and is in the shape of an annular shape, and a lens (230) located on the front side of the lamp plate (220). The front side of the lampshade (210) is arc-shaped convex.

5. A method for controlling the use of automotive lighting fixtures as described in any one of claims 1 to 4, characterized in that: The reset elastic element provides a reset force to the guide plate (310) to reset forward. The electromagnetic coil (700) is energized to generate an electromagnetic force of the same polarity as the magnetic part. The specific method is as follows: The working temperature of the LED light-emitting group (200) and the driving speed of the car are detected in real time. Based on the working temperature and the driving speed of the car, a set current is passed into the electromagnetic coil (700). Through electromagnetic force and under the action of the reset elastic element, the guide plate (310) is driven to float back and forth to adjust the flow area of ​​the heat dissipation gap (500) and the first heat dissipation channel (400). When the operating temperature is higher than the set high value T1 or the vehicle speed is higher than the set high value V1, the set high value current I1 is passed into the electromagnetic coil (700), and the guide plate (310) is moved backward by the repulsive electromagnetic force, so that the first heat dissipation channel (400) is connected to the heat dissipation gap (500) and the second heat dissipation channel (620) at the same time. When the operating temperature is lower than the set low value T2, the electromagnetic coil (700) is de-energized. Under the action of the reset elastic element, the guide plate (310) is reset forward to contact the rear side of the heat sink (600) to block the heat dissipation air passage (110).

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