A high-power LED high beam lamp

Abstract

The present invention provides a high-power LED high-beam lamp for long-distance illumination, comprising: a shell, a light source module and an optical reflector, wherein the light source module is fixedly arranged on the shell, and the optical reflector is arranged to be wrapped around the outer front of the light source module; the light source module comprises a base and a plurality of square COB light sources; the base has a cavity for accommodating a coolant and a plurality of prism surfaces separated on the periphery of the cavity, the COB light source is mounted on the prism surface through a fixed substrate, and light beams emitted from the plurality of COB light sources are respectively directed to the optical reflector, and after being reflected by the optical reflector, leave the shell for high-beam illumination; the present invention has the characteristics of energy saving, environmental protection and long service life.

Description

Technical Field

[0001] The invention belongs to the technical field of LED lamps, and in particular relates to a high-power LED high beam lamp capable of rapid heat dissipation. Background Art

[0002] The most significant feature of a high beam light is its high-intensity, long-distance illumination capability. The general effective illumination distance is about 1,000 to 3,000 meters. It is widely used in military, prisons, airports, ports, navigation, railway station light bridges, power vehicle headlights, or urban landscaping.

[0003] At present, when making high-power high beam lamps, 1000 to 3000 watts of xenon lamps or dysprosium lamps are used as the light source of the lamps. These xenon lamps or dysprosium lamps not only consume a lot of power, but also have a short working life, generally only about 1000 hours.

[0004] Compared with traditional lighting fixtures, LED has the advantages of small size, low energy consumption, long life, flexible and changeable appearance, and good stability. At present, with the rapid development of the LED lighting industry and the increasing maturity of manufacturing technology, the market demand for LED lighting is increasing day by day. At this stage, the luminous efficiency of LED has exceeded 200lm / W per watt, and replacing high-energy-consuming and inefficient bulbs has become a trend. High-power LED lights, such as projection lights used in airports, stadiums, docks, squares, bridges, golf course lights, RGB stage lights, RGB landscape projection lights, military searchlights, etc., have a wide range of uses.

[0005] With the emergence of LED integrated modules (COB), while providing high-power lighting, the heat generated is getting bigger and bigger. The heat dissipation problem of LED integrated modules has become the core problem that restricts its development. At present, most LED lighting products on the market use the traditional fin heat dissipation method. Although the technology is mature and the cost is low, it is difficult to meet the increasingly high demand for heat dissipation performance of LED integrated modules by using only this heat dissipation method. In addition, since LED integrated modules (COB) have the characteristic of not being able to be bent, it also brings inconvenience to the heat dissipation of LED integrated modules.

[0006] In view of the defects of high power consumption and short life of the xenon lamp or dysprosium lamp used as the light source in the prior art, the present invention provides a high-power LED high beam lamp using a COB light source. Summary of the invention

[0007] In view of the defects of the prior art, the present invention provides a high-power LED high beam lamp, which has the characteristics of energy saving, environmental protection and long service life.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a high-power LED high-beam lamp for long-distance illumination, comprising: a shell, a light source module and an optical reflector, wherein the light source module is fixedly arranged on the shell, and the optical reflector is arranged to be wrapped around the outer front of the light source module; the light source module comprises a base and a plurality of square COB light sources; the base has a cavity for accommodating a coolant and a plurality of prismatic surfaces separated on the periphery of the cavity, the COB light source is mounted to the prismatic surface through a fixed substrate, and the light beams emitted from the plurality of COB light sources are respectively directed to the optical reflector, and after being reflected by the optical reflector, leave the shell for high-beam illumination.

[0009] In the above technical solution of the present invention, a COB light source is used as the light source of the lamp. On the one hand, it has the characteristics of high luminous power, long irradiation distance and large illumination diameter. On the other hand, it also has the advantages of energy saving, environmental protection and long service life. In addition, the COB light source has the advantages of high color rendering index and optional color temperature, which is conducive to use as a high beam lamp.

[0010] Furthermore, since the COB light source has the characteristic of not being able to be bent, most of the lamps currently using COB light sources are used in a direct irradiation posture, and it is difficult to provide sufficient light intensity in a small volume. The present invention creatively adopts a base with a multi-faceted prism structure, and the COB light source is arranged on multiple prism surfaces of the base, wherein the COB light source has a square light-emitting surface covering a large area, and can generate sufficient light intensity in a small volume. The light emitted by the COB light source is emitted by the optical reflector and leaves the shell for high beam illumination.

[0011] The light source of the high beam lamp requires a particularly large luminous intensity per unit area, which is more than ten times that of ordinary civilian lighting fixtures. Therefore, a relatively high power luminous intensity must be obtained on the luminous surface within a certain volume range. Obviously, it is difficult for ordinary LED lamp beads to provide a relatively high power. The present invention simultaneously adopts multiple COB light sources and adopts a reasonable prism structure for installation, which is a lamp light source structure that can provide high power and high light intensity.

[0012] Specifically, in the present invention, the base is set to have a certain length, and the center of the base is set in the direction of the light-emitting surface of the vertical shell. The light beams emitted by multiple COB light sources form illumination light through reflection to perform high-beam illumination.

[0013] More specifically, a power circuit may be prefabricated on the prismatic surface of the base to supply power to the assembled COB light source.

[0014] The interior of the base in the present invention is configured as a hollow structure having a cavity in which a coolant is contained. The coolant is used to absorb the high heat generated by the COB light source during operation so as to keep the COB light source within a suitable operating temperature range.

[0015] In order to enhance the intensity of illumination, according to another specific embodiment of the present invention, the base is preferably in the shape of a pentagonal prism or a hexagonal prism, and correspondingly, the fixed substrate is a square structure suitable for the prism surface of the base, which has a larger effective heat dissipation area while carrying the COB light source.

[0016] Preferably, the fixed substrate is a pure copper substrate or a high heat dissipation ceramic substrate, which has excellent heat dissipation performance.

[0017] According to another specific embodiment of the present invention, a penetrating groove is provided on the prism surface, and the fixed substrate is sealed and mounted on the prism surface and completely covers the penetrating groove; wherein the fixed substrate is in direct contact with the coolant in the cavity, so that the area where the penetrating groove is located forms a heat dissipation window that "can allow the coolant to soak", and the main light-emitting area of ​​the COB light source is preferably the same as or similar to the area of ​​the penetrating groove, so as to achieve a better heat exchange and heat dissipation process.

[0018] According to another specific embodiment of the present invention, the optical reflector is a trumpet-shaped free-conical focusing cup, and the light source module is arranged on the inner side of the small opening end of the optical reflector.

[0019] Furthermore, the reflective surface of the optical reflector is provided with a silver-coated glass layer, which can concentrate highly concentrated light and efficiently send it through the silver-coated glass layer to unexpected illuminated objects thousands of meters away, so as to achieve the purpose of clearly identifying the characteristics of the illuminated objects or dynamic lighting at night.

[0020] As an extension of the present invention, a toothed heat sink is also included, wherein the accommodation space in the toothed heat sink is connected with the cavity as a whole, and the accommodation space and the cavity are filled with cooling liquid for absorbing the heat generated by the light source module.

[0021] The accommodating space has an effective volume far greater than that of the cavity, and can store more coolant. In addition, the toothed radiator has more thin heat dissipation fins, which can effectively dissipate heat in a short time, and has the advantages of high heat dissipation efficiency and fast speed.

[0022] According to another specific embodiment of the present invention, it also includes a liquid propeller, which acts on the cooling liquid to form a directional liquid flow at the fixed substrate in the cavity.

[0023] The liquid propeller is, for example, a rotating blade (with a motor) to make the coolant in the accommodation space and the cavity flow and form a stable liquid flow with a certain flow velocity and a nearly constant flow direction. The liquid flow flows through the inner surface of the fixed substrate, absorbs the heat generated by the COB light source located on the fixed substrate, and flows back to the accommodation space to dissipate heat.

[0024] The liquid flow in the present invention is always maintained within an appropriate temperature range. Since the coolant has a certain flow rate, the heat generated by the COB light source will not be unable to be dissipated in time. The heat generated by the COB light source can be carried out in a timely and effective manner and quickly dissipated to the external air through the radiator fins, thereby achieving the purpose of long-term stable operation of the high-power LED high beam lamp of the present invention.

[0025] As another extension of the present invention, the circulation structure of the liquid flow is: it also includes a liquid circulation pipeline; the base includes a top wall and a bottom wall located at both ends of a plurality of prism surfaces, a liquid inlet is provided on the bottom wall, and a liquid outlet is provided on the top wall, and the coolant forms a liquid flow between the liquid inlet and the liquid outlet; one end of the liquid circulation pipeline is connected to the liquid inlet, and the other end of the liquid circulation pipeline is connected to the accommodating space.

[0026] In the present solution, all the coolant in the cavity forms a liquid flow with a unique flow direction and a balanced flow speed at any time period. The liquid flow flows through each prismatic surface of the base at the same time, and dissipates heat for multiple COB light sources at the same time. Since the structural volume of the base is limited, the liquid inlet and liquid outlet of the coolant are respectively arranged on the top wall and the bottom wall, which can maximize the utilization of the coolant in the cavity, so that the multiple COB light sources are always kept in a low temperature range when working, and the COB light sources will not be affected by the temperature generated in a short period of time and cannot work normally.

[0027] According to another specific embodiment of the present invention, a liquid rectifier is provided in the containing structure to prevent the liquid from generating turbulence. The liquid rectifier is located at the liquid inlet and has a tapered portion facing the liquid propeller. One of the purposes of providing the tapered portion is to allow the coolant with a lower temperature in the containing space to flow closer to the prismatic surface of the base, which is beneficial to the heat dissipation of the COB light source.

[0028] After the liquid rectifier acts, the liquid flows in a more stable direction, which is conducive to absorbing the heat of the COB light source (fixed substrate).

[0029] As another extension of the present invention, an external radiator is also provided, which acts on the liquid circulation pipeline to dissipate heat for the coolant sent out from the liquid circulation pipeline; after the coolant passes through the external radiator and most of its heat is dissipated, it can be directly circulated to the cavity for use. This solution has a better cooling effect and is more conducive to the long-term operation of the high-power LED high beam lamp of the present invention.

[0030] As another extension of the present invention, in order to further improve the heat dissipation efficiency of the radiator, it also includes a guide structure formed in the accommodating space, wherein an outer cavity is formed between the guide structure and the side wall of the toothed radiator, an inner cavity is formed in the guide structure, the outer cavity and the inner cavity are connected to each other, and a liquid propeller is arranged in the inner cavity.

[0031] Furthermore, the cooling liquid in the outer cavity is in full contact with the fins and side walls of the radiator to perform rapid heat exchange, thereby obtaining cooling liquid with a lower temperature. The inner cavity and the outer cavity are connected, and under the action of the liquid propeller, the cooling liquid in the outer cavity that has been fully cooled enters the inner cavity and is transported into the cavity to quickly cool the fixed substrate (COB light source).

[0032] The present invention has the following beneficial effects:

[0033] 1. The light source module of the present invention creatively uses a prism structure base. Under the premise of a small volume, a square COB light source is arranged on the prism surface to obtain sufficient light intensity. In addition, the COB light source also has many advantages such as high light power, energy saving and environmental protection, long service life, high color rendering index, and adjustable color temperature, and is suitable for use as a high beam lamp;

[0034] 2. The illumination diameter of the high-power LED headlight of the present invention is several times greater than that of the traditional xenon lamp or dysprosium lamp searchlight. Even if the "scanning" segmented searchlight is not used, the illumination purpose of "scanning" segmented searchlight can be better achieved. This is particularly important during the use of the headlight. On the one hand, it improves the mechanical reliability of the headlight, and on the other hand, it prevents the user from visual fatigue.

[0035] 3. The present invention adopts a liquid flow heat dissipation method, which can quickly carry away the heat generated by the light source module, so that the light source module is always in a lower temperature range. It has high heat dissipation efficiency and fast heat dissipation speed, which is conducive to the long-term and stable operation of the LED high beam lamp.

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a high-power LED high beam lamp of the present invention;

[0038] Figure 2 It is a structural schematic diagram of the light source module of the present invention. DETAILED DESCRIPTION

[0039] like Figure 1 As shown in FIG. 2 , a high-power LED high beam lamp is used for long-distance illumination, comprising: a housing, a light source module 1 and an optical reflector 2.

[0040] The light source module 1 includes a base 11 and six square COB light sources 12;

[0041] The base 11 is a hollow hexagonal prism structure, which is fixed relative to the shell. The base 11 has a top wall 111, a bottom wall 112 and six prism surfaces 113 separated between the top wall 111 and the bottom wall 112. A cavity 114 is formed between the top wall 111, the bottom wall 112 and the six prism surfaces 113, and the cavity 114 contains coolant.

[0042] The COB light source 12 is prefabricated on a fixed substrate 13, and six fixed substrates 13 are respectively mounted on the prism surface 113, wherein the fixed substrate 13 is preferably a pure copper substrate with good heat dissipation performance;

[0043] See also Figure 2 In order to facilitate the coolant in the cavity 114 to fully contact with the fixed substrate 13, a penetrating groove (heat dissipation window) 115 is provided on the prism surface 113. The penetrating groove 115 occupies most of the area of ​​the prism surface 113. Correspondingly, the light-emitting surface area of ​​the COB light source 12 also occupies most of the area of ​​the fixed substrate 13. Preferably, the light-emitting surface of the COB light source 12 coincides with the penetrating groove 115.

[0044] See again Figure 2 Screw holes 116 are provided on the outer sides of the four corners of the penetrating groove 115, and the fixed substrate 13 is fixed to the prism surface 113 by bolt connection, wherein a sealing sticker is also used between the fixed substrate 13 and the prism surface 113 for packaging, so as to realize seamless assembly between the fixed substrate 13 and the prism surface 113.

[0045] See also Figure 1 The optical reflector 2 is wrapped in the front of the outer side of the light source module 1, and is preferably a trumpet-shaped free-conical focusing cup. The light source module 1 is arranged on the inner side of the small mouth end of the optical reflector 2. In order to be able to concentrate highly concentrated light and send it efficiently to unexpected illuminated objects thousands of meters away, a silver-plated glass layer is arranged on the light-emitting surface of the optical reflector 2 to enhance the concentration of light.

[0046] A power circuit is also prefabricated in the base 11, where the rated power of a single COB light source 12 is, for example, 60 watts. When the six COB light sources 12 are all connected to the rated power, the light beams emitted from the six COB light sources 12 are directly directed to the optical reflector 2 respectively. The light beams are strongly reflected by the silver-plated glass layer located at the best position around the COB light source 12, and the strong light emitted by the COB light source 12 is adjusted to be directly directed to the distant object to be illuminated.

[0047] In order to better dissipate the heat of the light source module 1 , as an extension of the present invention, the high-power LED high beam lamp of the present invention further includes a toothed heat sink 3 , a liquid propeller 4 and a liquid circulation pipeline 5 .

[0048] The toothed radiator 3 is fixed on the shell, and the base 11 is relatively fixed to the toothed radiator 3, so that the accommodation space 31 in the toothed radiator 3 is connected with the cavity 114 as a whole, and both the accommodation space 31 and the cavity 114 are filled with coolant.

[0049] As we know, the flowing liquid is conducive to quickly transferring the part of the liquid that has absorbed the heat, which can better dissipate the heat for the light source module 1. Figure 2 A liquid propeller 4 is fixedly arranged in the accommodating space 31, a liquid inlet is arranged on the bottom wall 112, and a liquid outlet is arranged on the top wall 111. One end of the liquid circulation pipeline 5 is connected to the liquid inlet, and the other end is connected to the accommodating space 31. The liquid propeller 4 directly acts on the coolant, so that the coolant forms a liquid flow in the cavity 114 (between the liquid inlet and the liquid outlet), and quickly takes away the heat generated by the light source module 1.

[0050] The liquid flows through each prismatic surface 113 of the base 11 at the same time, and dissipates heat to the six COB light sources 12 at the same time. Since the structural volume of the base 11 is limited, the liquid inlet and liquid outlet of the coolant are respectively arranged on the top wall 111 and the bottom wall 112, so that the coolant in the cavity 114 can be utilized to the maximum extent, so that the six COB light sources 12 are always kept in a relatively low temperature range when working, and the COB light source 12 will not be affected by the temperature generated in a short period of time and fail to work normally.

[0051] In order to make the lower temperature part of the coolant flow closer to the prism surface 113 of the base 11 during the flow process, and at the same time have a relatively stable flow rate, so as to directly and quickly perform the heat exchange process, in a preferred example of the present invention, a liquid rectifier 6 can also be provided downstream of the liquid propeller 4 and before the liquid inlet. Specifically, a shape of the liquid rectifier 6 is as follows: Figure 2 In the conical structure (conical portion) shown, after the coolant passes through the liquid rectifier 6, it will preferentially flow through the surface of each prism surface 113, forming an effect similar to the "skin effect (also known as skin effect)", which is beneficial to the cooling of the COB light source on each prism surface 113.

[0052] Based on the same effect as the liquid rectifier 6, in order to further improve the heat dissipation efficiency of the toothed heat sink 3, a guide structure 7 can also be provided in the accommodating space 31. The guide structure 7 is used to form a flow path for the coolant to first pass through the side wall (fins) of the toothed heat sink 3 for cooling and then enter the cavity 114 for heat dissipation of each COB light source 12. A preferred guide structure 7 is as follows: Figure 2The frustum-shaped structure shown in the figure has a hollow shell shape with the guide structure 7 opening toward the base 11, an outer cavity is formed between the guide structure 7 and the side wall of the toothed heat sink 3, an inner cavity is formed inside the guide structure 7 itself, the outer cavity and the inner cavity are interconnected, and the liquid propeller 4 is located in the inner cavity.

[0053] Specifically, the coolant flowing into the toothed radiator 3 through the liquid circulation pipeline 5 first flows into the outer cavity, is fully cooled by the side walls (fins) of the toothed radiator 3, and then flows into the inner cavity. Under the action of the liquid propeller 4, the coolant also flows in the outer cavity and the inner cavity at a stable flow rate and direction.

[0054] In order to further cool the coolant, in another preferred example of the present invention, an external radiator can be provided. The external radiator acts on the liquid circulation pipeline 5 to dissipate heat for the coolant in the liquid circulation pipeline 5. After the coolant passes through the external radiator, most of its heat is dissipated and it can be directly circulated to the cavity 114 for use.

[0055] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some improvements without departing from the scope of the present invention, that is, all equivalent improvements made according to the present invention should be covered by the scope of the present invention.

Claims

1. A high-power LED high beam lamp for long-distance illumination, characterized in that: include: A housing for fixing the light source module; An optical reflector is arranged to wrap around the front of the outer side of the light source module; The light source module includes a base and a plurality of square COB light sources; the base has a cavity for accommodating a coolant and a plurality of prism surfaces separated on the periphery of the cavity; the COB light source is mounted on the prism surface through a fixed substrate; the light beams emitted from the plurality of COB light sources are respectively directed to the optical reflector, and after being reflected by the optical reflector, leave the housing for high beam illumination; A toothed heat sink, wherein the accommodation space in the toothed heat sink is connected to the cavity as a whole, and the accommodation space and the cavity are filled with cooling liquid for absorbing the heat generated by the light source module; A liquid propeller, the liquid propeller acts on the cooling liquid to form a directional liquid flow in the cavity at the fixed base plate; A guide structure is formed in the accommodation space, wherein an outer cavity is formed between the guide structure and the side wall of the toothed heat sink, an inner cavity is formed in the guide structure, the outer cavity and the inner cavity are communicated with each other, and the liquid propeller is arranged in the inner cavity; It also includes a liquid circulation pipeline; the base includes a top wall and a bottom wall located at both ends of the plurality of prism surfaces, a liquid inlet is provided on the bottom wall, a liquid outlet is provided on the top wall, and the coolant forms the liquid flow between the liquid inlet and the liquid outlet; one end of the liquid circulation pipeline is connected to the liquid inlet, and the other end of the liquid circulation pipeline is connected to the accommodating space; A liquid rectifier for making the cooling liquid flow close to the prism surface is arranged in the accommodation space. The liquid rectifier is arranged in the accommodation space and located at the liquid inlet.

2. The high-power LED high beam lamp according to claim 1, characterized in that: The prism surface is provided with a penetrating groove, and the fixed substrate is sealed and attached to the prism surface and completely covers the penetrating groove.

3. The high-power LED high beam lamp according to claim 1, characterized in that: The fixed substrate is a pure copper substrate or a high heat dissipation ceramic substrate.

4. The high-power LED high beam lamp according to claim 1, characterized in that: The optical reflector is a trumpet-shaped free-conical focusing cup, and the light source module is arranged on the inner side of the small opening end of the optical reflector.

5. The high-power LED high beam lamp according to claim 1, characterized in that: An external radiator is also provided, and the external radiator acts on the liquid circulation pipeline to dissipate heat for the coolant in the liquid circulation pipeline.

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