Automobile LED headlamp based on wire-plate type electrode ion fan

Abstract

The invention belongs to the technical field of automobile LED headlamp devices, and particularly discloses an automobile LED headlamp based on a wire-plate type electrode ion fan, which comprises an LED heat conductor, a radiator and an ion fan. LED arrays are arranged on the upper surface and the lower surface of the LED heat conductor, and the radiator is arranged at the end, away from the LED arrays, of the LED heat conductor. The ion fan comprises a ventilation pipe groove, a partition plate and a line-parallel plate electrode pair. The ventilation pipe groove sleeves one end, far away from the LED heat conductor, of the radiator, and one end, far away from the radiator, of the ventilation pipe groove is an air inlet end. The number of the partition plates is two, and the two partition plates are both used for dividing the air inlet end into three parallel air inlet channels of the same structure. The number of the line-parallel plate electrode pairs is three, and the three line-parallel plate electrode pairs are arranged in the three air inlet channels in a one-to-one correspondence mode. The linear-parallel plate type solid ion fan is arranged at the tail end of the radiator, noise can be reduced to the maximum extent, the air volume can be increased, and the cooling requirement for safe and reliable work of the automobile LED headlamp is met.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile LED headlight devices, and in particular relates to an automobile LED headlight based on a wire-plate type electrode ion fan. Background Art

[0002] At present, the heat dissipation of automotive LED headlights during operation relies on mechanical fans to drive air to flow through the fins of the radiator in order to control the temperature of the LED PN junction.

[0003] However, mechanical fan cooling has the following disadvantages:

[0004] 1. Noise generation: including wind noise caused by the fan driving the air flow, friction noise when the motor rotor connected to the fan rotates, vibration noise caused by dust accumulation on the fan blades leading to increased rotor eccentricity, etc. These noises gradually increase with the extension of working time.

[0005] 2. Reduced heat dissipation performance: Friction and wear of moving parts in mechanical devices will reduce the heat dissipation performance of the cooling system; rotary fan cooling will deposit dust on the surface of the radiator fins, resulting in a decrease in the convection heat transfer coefficient. The decline in the heat dissipation effect of automotive LED headlights leads to a poor user experience.

[0006] 3. High energy consumption for heat dissipation: Mechanical heat dissipation is driven by a motor, and the power consumption is still quite large, especially when rotating at high speed.

[0007] Therefore, in order to change the shortcomings of the existing mechanical heat dissipation of automotive LED headlights, it is necessary to find a new heat dissipation method for automotive LED headlights. Summary of the invention

[0008] In view of the above-mentioned problems, the purpose of the present invention is to provide an automobile LED headlight based on a wire-plate electrode ion fan, which can effectively solve the problems of high noise, reduced heat dissipation performance and high heat dissipation energy consumption in automobile LED headlights using traditional mechanical heat dissipation.

[0009] The technical solution of the present invention is: an automotive LED headlight based on a wire-plate electrode ion fan, comprising:

[0010] The LED heat conductor is a plate-like structure, with an LED array disposed on the upper and lower surfaces of one end, and an insulating layer coated on the rest of the body;

[0011] A heat sink is arranged at one end of the LED heat conductor away from the LED array; and

[0012] An ion fan, comprising:

[0013] The ventilation pipe groove is sleeved on one end of the radiator away from the LED heat conductor, and the end of the ventilation pipe groove away from the radiator is the air inlet end;

[0014] There are two partitions, which are evenly spaced and arranged on one side of the ventilation pipe groove at the air inlet end, and are used to divide the air inlet end into three parallel air inlet channels with the same structure;

[0015] There are three groups of line-parallel plate electrode pairs, and the three groups of line-parallel plate electrode pairs are arranged in three air inlet channels in a one-to-one correspondence; each line-parallel plate electrode pair includes:

[0016] The wire electrode is vertically arranged at the center of the air inlet channel, the wire electrode is connected to a high voltage, and the voltage polarity is negative;

[0017] There are two plate electrodes, which are respectively arranged on two side walls of the air inlet channel parallel to the line electrode in a one-to-one correspondence, and the plate electrodes are grounded.

[0018] Furthermore, a heat pipe is arranged on the LED heat conductor. There are two heat pipes, which are arranged on the sides of the LED heat conductor respectively. One end of the heat pipe is connected to the radiator, and the other end is connected to the LED heat conductor near the LED array.

[0019] Furthermore, the radiator comprises:

[0020] A substrate, arranged at one end of the LED heat conductor away from the LED array (2);

[0021] The plate fins are evenly spaced on the upper and lower surfaces of the base, and a heat exchange gap is formed between two adjacent plate fins; one end of the plate fin away from the LED heat conductor is inserted into the ventilation pipe groove, and the air inlet end is connected to the heat exchange gap.

[0022] Furthermore, the substrate and the plate-type fins are both made of high thermal conductivity materials.

[0023] Furthermore, one end of the plate-type fin close to the LED heat conductor is provided with a cut corner.

[0024] Furthermore, the ventilation duct groove is made of insulating and high temperature resistant material.

[0025] Furthermore, at least one rib is provided on the side wall of the partition plate at the air inlet end, and the ends of the wire electrode and the plate electrode are fixed on the rib.

[0026] Furthermore, the two plate electrodes are symmetrically distributed about the line electrode, and a spacing S between the plate electrode and the line electrode ranges from 4 mm to 5 mm.

[0027] Furthermore, the wire electrode is a metal wire with a diameter of 0.15 mm to 0.2 mm, and its length is the same as the height of the ventilation pipe groove.

[0028] Furthermore, the plate electrode has a thickness of 0.1 mm to 0.3 mm, a length thereof being the same as a height of the ventilation duct groove, and a width thereof being the same as a length of the ventilation duct groove.

[0029] The working method of the present invention is as follows: after the air enters the ion fan through the end of the ventilation duct away from the radiator, it is ionized into charged particles under the action of the extremely high electric field strength around the wire electrode. The charged particles collide with neutral molecules under the action of the electric field generated between the wire electrode and the plate electrode to generate charge and momentum transfer and transmission, thereby forming air flow in the ventilation duct, and then forcing convection cooling of the radiator. The heat generated by the LED array is transferred to the radiator along with the LED heat conductor to achieve heat exchange, and finally the temperature of the LED array is reduced.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention replaces the traditional mechanical rotating fan and arranges a linear-parallel plate solid-state ion fan at the end of the radiator, which can reduce noise to the greatest extent, increase air volume, and meet the cooling requirements for safe and reliable operation of automobile LED headlights.

[0032] Furthermore, since the solid-state ion fan charges the dust in the air when it is working, its plate electrode has an electrostatic adsorption effect on the dust, which significantly reduces the dust accumulation on the surface of the radiator fins, thereby avoiding a decrease in the heat dissipation effect of the LED. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural explosion diagram of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the ion fan of the present invention;

[0035] Figure 3 It is a schematic diagram of the structure of the present invention;

[0036] Figure 4 It is a partial structural schematic diagram of the present invention;

[0037] Figure 5 It is a structural schematic diagram of the radiator of the present invention.

[0038] Among them, 1-LED heat conductor, 10-insulating layer, 11-heat conductive inner core shell, 111-upper shell, 112-lower shell, 12-wiring port, 13-heat pipe, 2-LED array, 3-heat sink, 31-base, 310-lead groove, 3100-rear cover, 311-boss, 32-plate fin, 4-ion fan, 40-air inlet end, 400-air inlet channel, 41-ventilation pipe groove, 42-partition, 420-rib, 43-wire electrode, 44-plate electrode, 5-limiter. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1 To the attached Figure 5 , the specific embodiments of the present invention are described in detail. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] It should be noted that the circuit connections involved in the present invention all adopt conventional circuit connection methods and do not involve any innovation.

[0042] Example

[0043] like Figure 1 , Figure 2 , Figure 3 The automotive LED headlight based on a wire-plate electrode ion fan shown includes an LED heat conductor 1 , a heat sink 3 and an ion fan 4 .

[0044] The LED heat conductor 1 is a plate-like structure, with the LED array 2 disposed on the upper and lower surfaces of one end thereof, and the remaining portion is coated with an insulating layer 10. The heat sink 3 is disposed at one end of the LED heat conductor 1 away from the LED array 2.

[0045] The ion fan 4 includes a ventilation duct 41, a partition 42 and a line-parallel plate electrode pair. The ventilation duct 41 is sleeved on the end of the radiator 3 away from the LED heat conductor 1, and the end of the ventilation duct 41 away from the radiator 3 is the air inlet end 40. There are two partitions 42, and the two partitions 42 are evenly spaced and arranged on one side of the ventilation duct 41 located at the air inlet end 40, and are used to divide the air inlet end 40 into three air inlet channels 400 with the same structure and parallel. There are three groups of line-parallel plate electrode pairs, and the three groups of line-parallel plate electrode pairs are arranged in three air inlet channels 400 in a one-to-one correspondence.

[0046] Each line-parallel plate electrode pair includes a line electrode 43 and a plate electrode 44. The line electrode 43 is vertically arranged at the center of the air inlet channel 400, and the line electrode 43 is connected to a high voltage with a negative voltage polarity. There are two plate electrodes 44, and the two plate electrodes 44 are arranged one by one on two side walls of the air inlet channel 400 parallel to the line electrode 43, and the plate electrode 44 is grounded.

[0047] Among them, Figure 1 As shown, a wiring port 12 is provided at one end of the insulating layer 10 close to the heat sink 3, and a wire 20 is laid on the surface of the insulating layer 10. One end of the wire 20 is connected to the LED array 2, and the other end is connected to the wiring port 12. The wiring port 12 is used to connect to an external power supply.

[0048] like Figure 1 As shown, the outer side of the LED heat conductor 1 is also provided with a heat-conducting inner core shell 11, and the heat-conducting inner core shell 11 is made of high-temperature resistant non-metallic material or thin-walled metal material. In this embodiment, it is made of a thin-walled metal material with a wall thickness of 0.6 mm. The heat-conducting inner core shell 11 includes an upper shell 111 and a lower shell 112. The upper shell 111 corresponds to the lower shell 112 in structure, and the upper shell 111 and the lower shell 112 are both reserved with light grooves 110 at the corresponding positions of the LED array 2. A boss is provided at the light groove 110, and the boss is used to fix and press the base of the packaged LED array 2 to ensure good thermal contact between it and the LED heat conductor 1.

[0049] It should be noted that: the LED heat conductor 1 is made of copper plate, and the LED array 2 is placed on the upper and lower sides of the end of the copper plate through the thermal interface material, and the other end of the copper plate is connected to the heat sink 3 as a whole. The roughness of the contact position between the copper plate and the base of the LED array 2 is less than Ra 0.4. Among them, the thermal interface material is thermal grease or thermal pad. In this embodiment, the LED heat conductor 1 is made of a copper plate with a length of 50mm, a width of 6mm, and a thickness of 3mm. In this embodiment, the LED array 2 is made of The company's ceramic-based CXA series LEDs are used as light sources for car headlights.

[0050] Preferably, Figure 1 As shown, a heat pipe 13 is provided on the LED heat conductor 1. There are two heat pipes 13, which are respectively provided on the sides of the LED heat conductor 1. One end of the heat pipe 13 is connected to the radiator 3, and the other end is connected to the LED heat conductor 1 near the LED array 2.

[0051] Preferably, Figure 1 , Figure 3 As shown, the heat sink 3 includes a base 31 and plate fins 32 .

[0052] like Figure 4 , Figure 5As shown, the substrate 31 is disposed at one end of the LED heat conductor 1 away from the LED array 2. Figure 5 As shown, a lead groove 310 is reserved on one side of the base 31 away from the LED heat conductor 1, and a rear cover plate 3100 is arranged on the lead groove 310. A lead channel is arranged in the base 31, and the lead channel is connected to the lead groove 310. The external wire passes through the lead groove 310, and the lead channel is welded on the wiring port 12. The base 31 is 35 mm long and 15 mm wide.

[0053] A convex shoulder 311 is provided on one side of the base 31 close to the LED heat conductor 1. The convex shoulder 311 is used to protect the solder joints between the external wire and the connection port 12 and to support the heat-conducting inner core shell 11. One end of the heat-conducting inner core shell 11 close to the heat sink 3 is sleeved on the convex shoulder 311. The convex shoulder 311 is a square tubular structure.

[0054] The rear cover plate 3100 is used to block the lead groove 310. The rear cover plate 3100 is set on the lead groove 310 by means of screws, buckles, etc., and is fixed by screws in this embodiment.

[0055] The plate fins 32 are evenly spaced on the upper and lower surfaces of the base 31, and a heat exchange gap is formed between two adjacent plate fins 32; the end of the plate fin 32 away from the LED heat conductor 1 is inserted into the ventilation pipe groove 41, and the air inlet end 40 is connected to the heat exchange gap. The height of the plate fin 32 is 12 mm, and it is a plurality of parallel high thermal conductivity material plates.

[0056] The end of the heat-conducting inner core shell 11 close to the radiator 3 is set on the boss 311 through the stopper 5, and the stopper 5 is used to be installed on the vehicle body. The end of the heat-conducting inner core shell 11 away from the radiator 3 is fixed to the LED heat conductor 1 by screws. The stopper 5 plays the role of fastening the two shells of the heat-conducting inner core on the one hand, and is used to fix the automobile LED headlight on the vehicle body on the other hand, and to place the LED at the focus of the concave mirror of the headlight. The stopper 5 is made of thin-walled corrosion-resistant metal with a wall thickness of not less than 0.5 mm. In this embodiment, stainless steel is used.

[0057] Preferably, the base 31 and the plate fins 32 are both made of high thermal conductivity materials, specifically copper, aluminum alloy and other high thermal conductivity materials. In this embodiment, copper is used.

[0058] Preferably, the plate fin 32 is provided with a bevel at one end close to the LED heat conductor 1. The end of the plate fin 32 close to the shoulder 311 is beveled to reduce the flow resistance of the ion wind after it flows through the radiator fin and hits the wall surface where the car headlight is installed, so as to facilitate the discharge of hot air.

[0059] Preferably, the ventilation duct 41 is made of insulating high temperature resistant material. The inner layer of the ventilation duct 41 is paved with copper foil wires, wherein the copper foil wires on the inner layer of the upper surface of the ventilation duct 41 are connected to three wire electrodes 43, and the copper foil wires on the inner layer of the lower surface are connected to six plate electrodes 44. The other ends of the copper foil wires are provided with wiring ports, which are used to connect high voltage or ground. The ventilation duct 41 supports the wire-parallel plate electrode pair and forms an air flow channel to reduce the interference of discharge and flow. The wall thickness should be not less than 1.5 mm, and the length of the cross section is 37.5 mm and the width is 34 mm.

[0060] Preferably, at least one rib 420 is provided on the side wall of the partition plate 42 located at the air inlet end 40, and the ends of the wire electrode 43 and the plate electrode 44 are fixed on the rib 420. Figure 2 As shown, in this embodiment, there are two ribs 420, and the two ribs 420 are arranged at an interval.

[0061] Preferably, the two plate electrodes 44 are symmetrically distributed about the wire electrode 43 , and the spacing S between the plate electrode 44 and the wire electrode 43 is in the range of 4 mm to 5 mm.

[0062] Preferably, the wire electrode 43 is a metal wire with a diameter of 0.15 mm to 0.2 mm, and its length is the same as the height of the ventilation pipe groove 41. If the diameter of the wire electrode 43 is less than 0.15 mm, the strength of the electrode will be reduced; if the diameter of the wire electrode 43 is greater than 0.2 mm, the flow rate of the ion wind will be reduced and the starting working voltage will be increased, so a metal wire with a diameter of 0.15 mm to 0.2 mm is selected. The material of the metal wire is tungsten or tungsten alloy, and tungsten wire is selected in this embodiment.

[0063] Preferably, the plate electrode 44 is a metal sheet with a thickness of 0.1 mm to 0.3 mm, a length the same as the height of the ventilation duct groove 41 , and a width the same as the width of the ventilation duct groove 41 extending to the end of the ventilation duct groove 41 and aligned with the edge of the ventilation duct groove 41 .

[0064] It should be noted that: the width of the three air inlet channels 400 is about 11 mm, and each air inlet channel 400 contains a set of line-parallel plate electrode pairs, the line electrode 43 is located in the center of the air inlet channel 400, and the plate electrode 44 is located on the left and right side walls of the air inlet channel 400. The material of the plate electrode 44 is a metal with a low work function, such as tungsten, tungsten-cerium alloy, etc. This type of metal has the characteristics of low electron work function and strong corrosion resistance, which can ensure that more ions are generated under high voltage, thereby forming an ion wind with a higher flow rate. The material of the plate electrode 44 in this embodiment is tungsten-cerium alloy.

[0065] The working principle of the above embodiment is:

[0066] After the air enters the ion fan 4 through the end of the ventilation duct 41 away from the radiator 3, it is ionized into charged particles under the action of the extremely high electric field strength around the three wire electrodes 43. The charged particles collide with neutral molecules under the action of the electric field generated between the wire electrode 43 and the plate electrode 44 to generate charge and momentum transfer and transmission, thereby forming air flow in the ventilation duct 41, and then forcing convection cooling of the plate fins 32 of the radiator 3. The heat generated by the LED array 2 is transferred to the radiator 3 along with the LED heat conductor 1 and the heat pipe 13 to achieve heat exchange, and finally reduce the temperature of the LED array 2.

[0067] The specific models of the above electronic components are not specially specified, and ordinary products available on the market can be selected as long as they can meet the use requirements of the present invention.

[0068] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. An automotive LED headlight based on a wire-plate electrode ion fan, characterized in that: include: The LED heat conductor (1) is a plate-shaped structure, and an LED array (2) is arranged on the upper surface and the lower surface of one end of the plate-shaped structure; A heat sink (3) is arranged at one end of the LED heat conductor (1) away from the LED array (2); The ion fan (4) comprises: a ventilation duct (41) sleeved on one end of a heat sink (3) away from an LED heat conductor (1), the end of the ventilation duct (41) away from the heat sink (3) being an air inlet end (40); two partitions (42), the two partitions (42) being evenly spaced and arranged on one side of the ventilation duct (41) located at the air inlet end (40), and being used to divide the air inlet end (40) into three air inlet channels (400) with the same structure and parallel to each other; and a line-parallel plate electrode. There are three groups of line-parallel plate electrode pairs, and the three groups of line-parallel plate electrode pairs are arranged in three air inlet channels (400) in a one-to-one correspondence; each line-parallel plate electrode pair comprises: a line electrode (43) vertically arranged at the center of the air inlet channel (400), the line electrode (43) is connected to a high voltage, and the voltage polarity is negative; there are two plate electrodes (44), and the two plate electrodes (44) are arranged in a one-to-one correspondence on two side walls of the air inlet channel (400) parallel to the line electrode (43), and the plate electrode (44) is grounded.

2. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 1, characterized in that: The LED heat conductor (1) is provided with a heat pipe (13), and there are two heat pipes (13). The two heat pipes (13) are respectively arranged on the side of the LED heat conductor (1), and one end of the heat pipe (13) is connected to the heat sink (3), and the other end is connected to the LED heat conductor (1) near the LED array (2).

3. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 1, characterized in that: The radiator (3) comprises: A substrate (31) is arranged at one end of the LED heat conductor (1) away from the LED array (2); The plate-type fins (32) are evenly spaced and arranged on the upper surface and the lower surface of the base (31), and a heat exchange gap is formed between two adjacent plate-type fins (32); one end of the plate-type fin (32) away from the LED heat conductor (1) is inserted into the ventilation pipe groove (41), and the air inlet end (40) is connected to the heat exchange gap.

4. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 3, characterized in that: The base (31) and the plate-type fins (32) are both made of high thermal conductivity materials.

5. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 3, characterized in that: One end of the plate-type fin (32) close to the LED heat conductor (1) is provided with a cut corner.

6. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 1, characterized in that: The ventilation pipe groove (41) is made of insulating high temperature resistant material.

7. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 1, characterized in that: The partition plate (42) is provided with at least one rib (420) on the side wall of the air inlet end (40), and the ends of the wire electrode (43) and the plate electrode (44) are fixed on the rib (420).

8. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 1, characterized in that: The two plate electrodes (44) are symmetrically distributed with respect to the wire electrode (43), and the spacing S between the plate electrode (44) and the wire electrode (43) is in the range of 4 mm to 5 mm.

9. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 1, characterized in that: The wire electrode (43) is a metal wire with a diameter of 0.15 mm to 0.2 mm, and its length is the same as the height of the ventilation pipe groove (41).

10. The automotive LED headlight based on a wire-plate electrode ion fan as claimed in claim 1, characterized in that: The plate electrode (44) has a thickness of 0.1 mm to 0.3 mm, a length that is the same as the height of the ventilation pipe groove (41), and a width that is the same as the length of the ventilation pipe groove (41).

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