WO2017201761A1 - 一种基于热对流的自主散热式cob集成led灯体 - Google Patents

一种基于热对流的自主散热式cob集成led灯体 Download PDF

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Publication number
WO2017201761A1
WO2017201761A1 PCT/CN2016/084014 CN2016084014W WO2017201761A1 WO 2017201761 A1 WO2017201761 A1 WO 2017201761A1 CN 2016084014 W CN2016084014 W CN 2016084014W WO 2017201761 A1 WO2017201761 A1 WO 2017201761A1
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WIPO (PCT)
Prior art keywords
heat
integrated led
cob integrated
disposed
lamp body
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PCT/CN2016/084014
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English (en)
French (fr)
Inventor
宣炯华
宣紫程
陈弘达
Original Assignee
宣炯华
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Priority claimed from CN201610340365.8A external-priority patent/CN105822915A/zh
Priority claimed from CN201620467900.1U external-priority patent/CN205859627U/zh
Application filed by 宣炯华 filed Critical 宣炯华
Publication of WO2017201761A1 publication Critical patent/WO2017201761A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage

Definitions

  • the invention relates to the technical field of LED illumination, in particular to an independent heat dissipation COB integrated LED lamp body based on thermal convection.
  • the COB integrated LED light source Compared with a single LED lamp bead, because the COB integrated LED light source generates a large amount of heat, it often needs heat dissipation to ensure its normal operation.
  • the heat sink is generally disposed after the COB integrated LED light source. Through the heat dissipation of the heat sink, the heat dissipation effect of the COB integrated LED heat is mainly transmitted by the radiation to the heat sink, so the heat dissipation effect is poor.
  • the Chinese invention patent "heat-dissipating LED lamp” with the announcement number CN101900254B discloses that a ventilation groove is formed in the panel of the LED lamp to enhance the air convection of the rear fin portion to improve the heat dissipation effect.
  • the heat sink of the technology is an open design, and it is difficult to form a heat convection with sufficient strength, and substantially relies on radiant passive heat dissipation, and the heat dissipation effect is not good.
  • the technology uses a simple longitudinal heat convection heat dissipation, and requires a large number of ventilation slots on the panel, which not only increases the processing difficulty, but also reduces the strength of the product.
  • COB integrated LED lamp There is a COB integrated LED lamp, a casing is arranged on the back of the COB integrated LED light source, and a heat conducting piece connecting the COB integrated LED light source and the outer casing is arranged, and the heat generated by the COB integrated LED light source is transmitted to the heat through the thermal conductive sheet. To the outer casing, cool down by the passive heat dissipation of heat radiation.
  • the above technology can effectively improve the protection strength of the COB integrated LED light source, the heat dissipation performance of the COB integrated LED light source cannot be fully satisfied due to the limited area of the outer casing.
  • the present invention discloses a COB integrated LED lamp body capable of enhancing the protection level of the COB integrated LED light source and improving the heat dissipation performance.
  • a self-heating COB integrated LED lamp body based on thermal convection comprising a mounting panel and a raised back cover disposed on the back of the mounting panel, the mounting panel and the back cover surrounding a heat-dissipating compartment is mounted with a COB integrated LED light source module, wherein the heat-dissipating compartment is provided with a plurality of heat-conducting bridges connecting the mounting panel and the back cover; and the back of the mounting panel is further provided with a plurality of extending into the a heat dissipating body in the heat dissipating compartment that is not connected to the back cover; the heat dissipating compartment is further provided with a venting hole communicating with the outside.
  • the back cover can effectively protect the structure of the COB integrated LED light source module installed in the installation panel or the heat dissipation compartment, and is prevented from being damaged by impacts such as impact, rain and snow.
  • a part of the heat generated by the COB integrated LED light source on the mounting panel is transferred to the back cover through the heat conduction bridge to dissipate heat in the form of radiation.
  • the remaining heat of the COB integrated LED light source is conducted through the heat sink to the heat sink, heating the air in the heat sink to expand its volume and enhance the air pressure in the heat sink.
  • the heat dissipation chamber Under the action of the internal and external pressure difference, the heat dissipation chamber generates airflow through the vent hole and the outside air, and the heat in the heat dissipation cavity is taken away by the flowing air to further reduce the temperature of the COB integrated LED light source.
  • the closed heat-dissipating chamber is beneficial to increase the air pressure in the cavity during heating, increase the pressure difference with the outside atmosphere, and enhance the airflow intensity. At higher air pressures, the air flows through the narrow venting holes, according to the Bernoulli equation.
  • the velocity of the airflow will be increased and quickly sprayed to the outside, and the air flow rate outside the venting hole will be correspondingly increased to cause the pressure to drop, and the gas in the heat dissipation chamber is further promoted to achieve autonomous heat dissipation.
  • the heat dissipation compartment includes a heat exchange zone and a convection zone disposed at both ends of the heat exchange zone; the heat dissipation body is disposed in the heat exchange zone, and the gas vent is disposed at a bottom of the convection zone.
  • the invention has the venting ports at both ends, which is favorable for forming a high pressure in the middle of the heat dissipating cavity and a low pressure state at both ends, which is beneficial to enhancing the internal convection intensity inside the heat dissipating cavity, so that the heat in the central heat exchange zone can be fully transmitted to the venting port by the airflow. Discharge, further enhance the scattered effect of the present invention without increasing the number of vents.
  • the heat conducting bridge is disposed along an axial direction of the heat dissipation chamber, the heat conducting bridge is in a sheet shape; two adjacent heat conducting bridges form a guiding groove, and the heat radiating body is disposed in the guiding groove; Vent holes are provided at both ends of the flow guiding groove.
  • the radiator can heat the temperature of the air in the diversion tank, and the temperature in the diversion tank rises and flows to the low pressure region at both ends.
  • the diversion trough helps to separate the heat dissipation chamber into a plurality of small areas, which is beneficial to improving the heat dissipation chamber.
  • the speed of boosting makes convection more likely in the heat-dissipating compartment; on the other hand, it can also guide the direction of the airflow, avoiding the collision of airflow in different directions and forming turbulence to reduce the convection efficiency.
  • a COB integrated LED mounting slot is disposed on a front surface of the mounting panel corresponding to the heat exchange area;
  • a heat conducting buffer block is disposed on a back surface of the COB integrated LED mounting slot, and the heat sink and the heat conducting bridge are buffered from the heat conduction The surface of the block extends; the thermally conductive bridge extends through the heat exchange zone.
  • the heat conducting bridge is disposed along an axial direction of the heat dissipation chamber, the heat conducting bridge is in a sheet shape; two adjacent heat conducting bridges form a guiding groove, and the heat radiating body is disposed in the guiding groove; a venting hole is disposed at both ends of the guiding groove; the heat dissipating body is disposed along the axial direction of the heat dissipating chamber and is in a sheet shape and penetrates the heat exchange area; the width of the cross section of the heat conducting bridge is from the heat conducting buffer block to the outside Gradually increasing; the heat sink is wide The degree gradually increases and decreases from the heat-conductive buffer block to the outside; the height of the heat conductor is 30%-70% of the depth of the guide groove.
  • the front surface of the mounting panel is provided with a COB integrated LED mounting slot, and the top of the edge of the COB integrated LED mounting slot is folded toward the center of the mounting slot to form a card slot surrounding the mounting slot; the COB integrated LED light source module It is installed at the bottom of the COB integrated LED mounting slot; the outer side of the COB integrated LED light source module is provided with elastic members embedded in the card slot.
  • the COB integrated LED light source module (usually a circuit board with a COB integrated LED chip) is directly pressed into the card slot by an elastic member, and is fixed and stable, and is not easily heated due to the prior art fixing by using a screw or the like.
  • the elastic member can be implemented by a prior art, such as a snap spring or the like.
  • the heat exchange zone and the convection zone are detachably connected; a plurality of main fixed blocks are disposed on both end faces of the heat exchange zone, and an end face of the end of the convection zone and the heat exchange zone is provided with a main fixed block a corresponding auxiliary fixing block; the heat exchange area and the convection area are fixed by screws penetrating the main fixing block and the auxiliary fixing block.
  • the main fixed blocks at both ends of the heat exchange area are in one-to-one correspondence, and the corresponding main fixed blocks are connected by reinforcing strips running through the heat exchange area and parallel to the axis of the heat dissipation chamber; the main fixed block, the auxiliary fixed block and the reinforcing strip are disposed in the heat dissipation chamber Inner wall.
  • the reinforcing strip can be used as a skeleton to improve the strength of the COB integrated LED lamp body of this product.
  • the invention provides a heat dissipating body in the heat dissipation chamber, can effectively heat the air in the heat dissipation chamber, and forms air convection due to the pressure difference between the heat dissipation chamber and the atmosphere, thereby effectively improving the heat dissipation efficiency of the COB integrated LED lamp body.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 2 is a schematic view showing the structure of the heat exchange zone of the present invention.
  • Figure 3 is a schematic view of the structure of the present invention.
  • Figure 4 is a partial enlarged view of the mounting groove of the present invention.
  • the embodiment provides a self-heating COB integrated LED lamp body based on thermal convection, as shown in FIG. 1 to FIG. 4, including a mounting panel 1 and a raised back cover 2 disposed on the back of the mounting panel 1, the mounting The panel 1 and the back cover 2 are integrated into a heat-dissipating compartment 3, and the mounting panel 1 is mounted with a COB integrated LED light source module 4, and the heat-dissipating compartment 3 is provided with a plurality of heat-conducting bridges 5 connecting the mounting panel 1 and the back cover 2;
  • the rear surface of the mounting panel 1 is further provided with a plurality of heat dissipating bodies that extend into the heat dissipating compartment 3 and are not connected to the back cover 2; the heat dissipating compartment 3 is further provided with a venting hole 6 communicating with the outside.
  • the COB integrated LED light source module can be implemented by any prior art, and a circular LED light source module encapsulated by a COB is particularly preferred.
  • the heat sink can be made of heat-dissipating aluminum.
  • the heat dissipation compartment 3 includes a heat exchange zone 7 and a convection zone 8 disposed at both ends of the heat exchange zone 7; the heat dissipation body is disposed in the heat exchange zone 7, and the venting port is disposed in the convection zone 8 bottom.
  • the heat conducting bridge 5 is disposed along the axial direction of the heat dissipation chamber 3, the heat conducting bridge 5 is in the form of a sheet; the adjacent two heat conducting bridges 5 form a guiding groove, and the heat radiating body is disposed in the guiding groove
  • the venting holes 6 are disposed at both ends of the flow guiding groove.
  • a COB integrated LED mounting slot 10 is disposed on a front surface of the mounting panel 1 corresponding to the heat exchange area 7; a thermally conductive buffer block 9 is disposed on a back surface of the COB integrated LED mounting slot 10, and the heat sink and the heat sink
  • the heat conducting bridge 5 extends from the surface of the heat conducting buffer block 9; the heat conducting bridge 5 penetrates through the heat exchange region 7.
  • the heat conducting buffer block is integrally formed with the panel, and the cross section thereof is semicircular.
  • the cross section of the thermally conductive bumper may also be a geometric shape such as a rectangle, an ellipse or the like.
  • the heat conducting bridge 5 is disposed along the axial direction of the heat dissipation chamber 3, the heat conducting bridge 5 is in the form of a sheet; the adjacent two heat conducting bridges 5 form a guiding groove, and the heat radiating body is disposed in the guiding flow.
  • the venting hole 6 is disposed at both ends of the flow guiding groove; the heat dissipating body is disposed along the axial direction of the heat dissipating chamber 3 and is in a sheet shape, and penetrates through the heat exchange area 7;
  • the width of the cross section gradually increases from the thermal buffer block 9 to the outside; the width of the heat dissipating body gradually increases and decreases from the thermal conductive block 9 to the outside; the height of the thermal conductor is 57% of the depth of the diversion groove, and the heat dissipating body has the most cross section.
  • the width of the width is 75% of the width of the widest section of the heat-conducting bridge section and 3.2 times of the narrowest section of the heat-conducting bridge section.
  • the total area of the venting holes is 20% of the area of the heat conductor. After testing, this proportion of the structure has the most significant heat dissipation effect, and can effectively improve the mechanical strength of the heat dissipation cavity.
  • the front surface of the mounting panel 1 is provided with a COB integrated LED mounting slot 10, and the top of the edge of the COB integrated LED mounting slot 10 is folded toward the center of the mounting slot to form a card slot 11 surrounding the mounting slot; the COB integration
  • the LED light source module 4 is disposed at the bottom of the COB integrated LED mounting slot 10; the outer side of the COB integrated LED light source module 4 is provided with an elastic member embedded in the card slot 11.
  • the elastic member comprises at least one metal snap spring 12.
  • the heat exchange area 7 and the convection area 8 are detachably connected; a plurality of main fixed blocks 13 are disposed at both end faces of the heat exchange area 7, and one end of the convection area 8 and the heat exchange area 7 is connected The end faces are provided with auxiliary fixing blocks 14 in one-to-one correspondence with the main fixing blocks 13; the heat exchange regions 7 and the convection regions 8 are fixed by screws penetrating the main fixing blocks 13 and the auxiliary fixing blocks 14.
  • each end of the heat exchange area is provided with three main fixing blocks, which are respectively disposed on both sides and the top of the back cover.
  • main fixing blocks 13 at both ends of the heat exchange area 7 are in one-to-one correspondence, and the corresponding main fixed blocks 13 are connected by a reinforcing strip 15 extending through the heat exchange area 7 and parallel to the axis of the heat dissipation chamber 3; the main fixed block 13
  • the auxiliary fixing block 14 and the reinforcing strip 15 are disposed on the inner wall of the heat dissipation chamber 3.
  • the embodiment provides a self-heating COB integrated LED lamp body based on thermal convection, comprising a mounting panel and a raised back cover disposed on the back of the mounting panel, the mounting panel and the back cover surrounding a heat dissipation compartment, and the mounting panel
  • a COB integrated LED light source module is mounted thereon, and the heat dissipation compartment is provided with a plurality of heat conduction bridges connecting the installation panel and the back cover; the back surface of the installation panel is further provided with a plurality of protrusions extending into the heat dissipation compartment.
  • a heat dissipating body connected to the back cover; the heat dissipating compartment is further provided with a venting hole communicating with the outside.
  • the COB integrated LED light source module can be selected from any COB packaged LED light source.
  • the heat dissipation compartment includes a heat exchange zone and a convection zone disposed at both ends of the heat exchange zone; the heat dissipation body is disposed in the heat exchange zone, and the gas vent is disposed at a bottom of the convection zone.
  • the heat conducting bridge is disposed along an axial direction of the heat dissipation chamber, the heat conducting bridge is in a sheet shape; two adjacent heat conducting bridges form a guiding groove, and the heat radiating body is disposed in the guiding groove; Vent holes are provided at both ends of the flow guiding groove.
  • a front surface of the mounting panel corresponding to the heat exchange area is provided with a COB integrated LED mounting slot; a rear surface of the COB integrated LED mounting slot is provided with a protruding heat conducting buffer block, and the heat radiating body and the heat conducting bridge are The surface of the thermally conductive buffer block extends; the thermally conductive bridge extends through the heat exchange region.
  • the heat conducting bridge is disposed along the axial direction of the heat dissipation chamber, the heat conducting bridge is in a sheet shape; the adjacent two heat conducting bridges form a guiding groove, and the heat radiating body is disposed in the guiding groove;
  • the venting holes are disposed at both ends of the guiding groove, and the heat dissipating body is disposed along the axial direction of the heat dissipating chamber and is in a sheet shape and penetrates the heat exchange area;
  • the width of the cross section of the heat conducting bridge is from the heat conducting buffer block The outer side gradually increases; the width of the heat sink gradually increases and decreases from the heat conducting buffer block; the height of the heat conductor is 70% of the depth of the guiding groove.
  • the width of the widest part of the heat sink section is 50% of the width of the widest section of the heat conducting bridge section, which is 1.2 times of the narrowest section of the heat conducting bridge section.
  • the total area of the venting holes is 40% of the area of the heat conductor.
  • the front surface of the mounting panel is provided with a COB integrated LED mounting slot, and the top of the edge of the COB integrated LED mounting slot is folded toward the center of the mounting slot to form a card slot surrounding the mounting slot; the COB integrated LED light source module It is installed at the bottom of the COB integrated LED mounting slot; the outer side of the COB integrated LED light source module is provided with elastic members embedded in the card slot.
  • the elastic member is an elastic gasket.
  • heat exchange area and the convection area are detachable connections; they may be screw connections or snap connections.
  • the embodiment provides a self-heating COB integrated LED lamp body based on thermal convection, comprising a mounting panel and a raised back cover disposed on the back of the mounting panel, the mounting panel and the back cover surrounding a heat dissipation compartment, and the mounting panel
  • a COB integrated LED light source module is mounted thereon, and the heat dissipation compartment is provided with a plurality of heat conduction bridges connecting the installation panel and the back cover; the back surface of the installation panel is further provided with a plurality of protrusions extending into the heat dissipation compartment.
  • a heat dissipating body connected to the back cover; the heat dissipating compartment is further provided with a venting hole communicating with the outside.
  • the heat dissipating body is disposed along the axial direction of the heat dissipation cavity and penetrates the heat dissipation cavity; the venting port is disposed at the bottom of the heat dissipation cavity.
  • the heat conducting bridge is disposed along the axial direction of the heat dissipation chamber, the heat conducting bridge is in a sheet shape; the adjacent two heat conducting bridges form a guiding groove, and the heat radiating body is disposed in the guiding groove.
  • the heat conducting bridge is disposed along the axial direction of the heat dissipation chamber, the heat conducting bridge is in a sheet shape; the adjacent two heat conducting bridges form a guiding groove, and the heat radiating body is disposed in the guiding groove;
  • the venting holes are disposed at both ends of the guiding groove, and the heat dissipating body is disposed along the axial direction of the heat dissipating chamber and is in a sheet shape and penetrates the heat exchange area;
  • the width of the cross section of the heat conducting bridge is from the heat conducting buffer block The outer side gradually increases; the width of the heat sink gradually narrows and narrows from the heat conducting buffer block; the height of the heat conductor is 30% of the depth of the guide groove.
  • the front surface of the mounting panel is provided with a COB integrated LED mounting slot, and the top of the edge of the COB integrated LED mounting slot is folded toward the center of the mounting slot to form a card slot surrounding the mounting slot; the COB integrated LED light source module It is installed at the bottom of the COB integrated LED mounting slot; the outer side of the COB integrated LED light source module is provided with elastic members embedded in the card slot.
  • the elastic member comprises at least one metal snap spring.
  • the panel and the back cover are detachably connected.
  • main fixing blocks at both ends of the heat exchange area are in one-to-one correspondence, and the corresponding main fixed blocks are connected by reinforcing strips running through the heat exchange area and parallel to the axis of the heat dissipation chamber; the main fixed block, the auxiliary fixed block and the reinforcing strip Set on the inner wall of the radiator compartment.
  • the embodiment provides a self-heating COB integrated LED lamp body based on thermal convection, comprising a mounting panel and a raised back cover disposed on the back of the mounting panel, the mounting panel and the back cover surrounding a heat dissipation compartment, and the mounting panel
  • a COB integrated LED light source module is mounted thereon, and the heat dissipation compartment is provided with a plurality of heat conduction bridges connecting the installation panel and the back cover; the back surface of the installation panel is further provided with a plurality of protrusions extending into the heat dissipation compartment.
  • a heat dissipating body connected to the back cover; the heat dissipating compartment is further provided with a venting hole communicating with the outside.
  • the heat dissipating body and the heat conducting bridge in the embodiment are disposed along the axial direction of the heat dissipating cavity; the venting holes are disposed on the bottom surface of the middle portion of the heat dissipating cavity.
  • This comparative example provides an independent heat dissipation COB integrated LED lamp body based on heat convection, including installation
  • the panel is mounted with a COB integrated LED light source module, and the panel is provided with a plurality of heat sinks. There are also a plurality of venting holes in the panel.
  • the present invention provides a self-heating COB integrated LED lamp body based on thermal convection, comprising a mounting panel and a raised back cover disposed on the back of the mounting panel, the mounting panel and the back cover surrounding a heat sink, the mounting panel A COB integrated LED light source module is mounted thereon, and the heat dissipation compartment is provided with a plurality of thermal conductive sheets connecting the installation panel and the back cover; the heat dissipation compartment is further provided with a venting hole communicating with the outside.
  • the COB integrated LED light source module is a commercially available Citizen CLL050.
  • the volume of the cooling compartment is 0.2m 3 .
  • the temperature of the central part of the light-emitting surface of the COB integrated LED light source module is measured within 10 hours (thermocouple test, room temperature 25 ° C). The results are shown in the table below.
  • Example 1 97.05 ⁇ 0.13 107.15 ⁇ 0.10
  • Example 2 128.12 ⁇ 0.21 131.33 ⁇ 0.25
  • Example 3 132.31 ⁇ 0.19 148.21 ⁇ 0.31
  • Example 4 135.33 ⁇ 0.23 159.92 ⁇ 0.30 Comparative example 1 152.16 ⁇ 0.29 188.30 ⁇ 0.21 Comparative example 2 143.22 ⁇ 0.51 175.96 ⁇ 0.61
  • the lamp bodies of the above embodiments were all made of a commercially available aluminum alloy (6061). Place the lamp body horizontally with the back cover facing up, and apply pressure to the upper and lower sides of the lamp body. The pressure intensity was increased in turn to test the amount of pressure applied when the height of the lamp body was reduced by 10% (significant deformation). The results are shown in the table below.

Abstract

一种基于热对流的自主散热式COB集成LED灯体。在散热舱(3)中设置散热体，可有效加热散热舱中的空气，使散热舱(3)与大气间因压力差而形成空气对流，可有效提高COB集成LED灯体的散热效率。

Description

一种基于热对流的自主散热式COB集成LED灯体 技术领域
本发明涉及LED照明技术领域，具体涉及一种基于热对流的自主散热式COB集成LED灯体。
背景技术
相对于单个的LED灯珠，由于COB集成LED光源的发热量较大，常需要散热来保证其正常工作，现有COB集成LED光源在进行散热设计时，一般在COB集成LED光源后设置散热片，通过散热片散热，由于COB集成LED热量传导到散热片上主要通过辐射散热，因而散热效果较差。公告号为CN101900254B的中国发明专利“散热LED灯”公开了在LED灯具的面板上开设贯通的通风槽，增强背面散热片部位的空气对流，以提高散热效果。但该技术的散热片为开放式设计，难以形成足够强度的热对流，实质上仍主要依靠辐射式被动散热，散热效果不佳。此外，该技术通过单纯的纵向热对流散热，需要在面板上设置大量的通风槽，不但增加加工难度，更容易降低产品的强度。
现有一种COB集成LED灯具，在COB集成LED光源的背面设置一外壳，并在COB集成LED光源和外壳间设置连接二者的导热片，将COB集成LED光源工作产生的热量通过导热片传到至外壳，以热辐射这一被动散热的方式降温。虽然上述技术可以有效提高COB集成LED光源的保护强度，但由于外壳的面积受限，其散热性能并不能完全满足控制COB集成LED光源温度的需求。
发明内容
有鉴于此，本发明公开一种即可增强COB集成LED光源防护等级、又可提高散热性能的COB集成LED灯体。
本发明的目的通过以下技术方案实现：一种基于热对流的自主散热式COB集成LED灯体，包括安装面板以及设置在安装面板背面的、隆起的背盖，所述安装面板和背盖围合成一散热舱，安装面板上安装有COB集成LED光源模组，所述散热舱中设有多个连接安装面板和背盖的导热桥；所述安装面板的背面还设有多个伸入所述散热舱中的、不与背盖连接的散热体；所述散热舱还设有与外界连通的透气孔。
本发明中，背盖可以有效保护安装在安装面板或散热舱内的COB集成LED光源模组等结构，避免其遭受撞击、雨雪等因素的影响而损坏。安装面板上的COB集成LED光源工作产生的一部分热量经导热桥传递至背盖，以辐射的形式散热。COB集成LED光源的其余热量则通过散热体传导至散热舱中，加热散热舱中的空气，使其体积膨胀而增强散热舱中的气压。在内外压力差的作用下，散热舱通过透气孔与外界产生气流，通过流动的空气带走散热腔内的热量，进一步降低COB集成LED光源温度。密闭的散热舱有利于提高升温时腔体内的气压，增加与外界大气的压力差，进而增强气流强度。在较高的气压下气流流经狭窄的透气孔，根据伯努利方程
Figure PCTCN2016084014-appb-000001
气流的速度将被增快而迅速地喷射至外界，透气孔外的空气流速相应提高而导致压力下降，又进一步的促进散热腔内的气体流出，实现自主式散热。
进一步的，所述散热舱包括热交换区和设置在热交换区两端的对流区；所述散热体设置在所述热交换区，所述透气口设置在所述对流区底部。
本发明将透气口设置在两端，有利于形成散热腔中部高压而两端低压的状态，有利于增强散热腔内部的内对流强度，使中部热交换区的热量能够被气流充分传递至透气口排出，在不增加透气口数量的前提下，进一步增强本发明的散效果。
进一步的，所述导热桥沿所述散热舱的轴向设置，所述导热桥为片状；相邻的两个导热桥形成导流槽，所述散热体设置在导流槽中；所述透气孔设置在导流槽的两端。
散热器可以加热导流槽内空气的温度，是导流槽内温度升高并向两端的低压区域流动，导流槽有利于将散热舱分隔成多个小区域，不但有利于提高散热舱内升压的速度令散热舱内更容易产生对流；另一方面，还可引导气流方向，避免不同方向的气流碰撞而形成湍流导致的降低对流效率。
进一步的，所述安装面板正面对应所述热交换区的位置设有COB集成LED安装槽；COB集成LED安装槽背面设有导热缓冲块，所述散热体和所述导热桥从所述导热缓冲块表面延伸出；所述导热桥贯穿所述热交换区。
优选的，所述导热桥沿所述散热舱的轴向设置，所述导热桥为片状；相邻的两个导热桥形成导流槽，所述散热体设置在导流槽中；所述透气孔设置在导流槽的两端所述散热体沿所述散热舱的轴向设置且为片状，且贯穿所述热交换区；所述导热桥其断面的宽度从导热缓冲块向外侧逐渐增加；所述散热体其宽 度从导热缓冲块向外侧逐渐增缩窄；所述导热体的高度为导流槽深度的30％-70％。
优选的，所述安装面板正面设有COB集成LED安装槽，所述COB集成LED安装槽边缘的顶部向安装槽中心翻折，形成一环绕安装槽的卡槽；所述COB集成LED光源模组设置在COB集成LED安装槽底部；COB集成LED光源模组外侧设有嵌入卡槽中的弹性件。
COB集成LED光源模组(通常是设有COB集成LED芯片的线路板)直接用过弹性件压紧在卡槽中，相对于采用螺丝等现有技术固定，本发明具有固定稳定、不易因热胀缩和磨损松脱、易于装配等优点。所述弹性件可选用现有技术实现，如卡簧等。
所述热交换区和对流区为可拆卸连接；所述热交换区的两端面设有多个主固定块，所述对流区与热交换区相接的一端的端面设有与主固定块一一对应的辅固定块；所述热交换区和对流区通过穿透主固定块和辅固定块的螺丝固定。
热交换区两端的主固定块一一对应，对应的主固定块间通过贯穿热交换区、与散热舱轴线平行的加强条连接；所述主固定块、辅固定块和加强条设置在散热舱内壁。
加强条可作为骨架，提高本产品COB集成LED灯体的强度。
本发明的散热舱在组装时，只需要通过螺丝穿透、锁紧主固定块和辅固定块，工序简单而结构稳定，有利于提高产品的生产效率，尤其适于大规模自动化生产。
本发明在散热舱中设置散热体，可有效加热散热舱中的空气，使散热舱与大气间因压力差而形成空气对流，可有效提高COB集成LED灯体的散热效率。
附图说明
图1是本发明的结构示意图。
图2是本发明热交换区的结构示意图。
图3是本发明的结构示意图。
图4是本发明安装槽的局部放大图。
具体实施方式
为了便于本领域技术人员理解，下面将结合附图以及实施例对本发明作进一步详细描述：
实施例1
本实施例提供一种基于热对流的自主散热式COB集成LED灯体，如图1-图4所示，包括安装面板1以及设置在安装面板1背面的、隆起的背盖2，所述安装面板1和背盖2围合成一散热舱3，安装面板1上安装有COB集成LED光源模组4，所述散热舱3中设有多个连接安装面板1和背盖2的导热桥5；所述安装面板1的背面还设有多个伸入所述散热舱3中的、不与背盖2连接的散热体；所述散热舱3还设有与外界连通的透气孔6。
本实施例中，所述COB集成LED光源模组可选用任一种现有技术实现，特别优选通过COB封装的圆形LED光源模组。所述散热舱可选用散热铝材制成。
进一步的，所述散热舱3包括热交换区7和设置在热交换区7两端的对流区8；所述散热体设置在所述热交换区7，所述透气口设置在所述对流区8底部。
进一步的，所述导热桥5沿所述散热舱3的轴向设置，所述导热桥5为片状；相邻的两个导热桥5形成导流槽，所述散热体设置在导流槽中；所述透气孔6设置在导流槽的两端。
更进一步的，所述安装面板1正面对应所述热交换区7的位置设有COB集成LED安装槽10；COB集成LED安装槽10背面设有突起的导热缓冲块9，所述散热体和所述导热桥5从所述导热缓冲块9表面延伸出；所述导热桥5贯穿所述热交换区7。
本实施例中，导热缓冲块与面板一体成型，其断面为半圆形。在其他实施例中，导热缓冲块的断面可也以是矩形、椭圆形等几何形状。
更进一步的，所述导热桥5沿所述散热舱3的轴向设置，所述导热桥5为片状；相邻的两个导热桥5形成导流槽，所述散热体设置在导流槽中；所述透气孔6设置在导流槽的两端所述散热体沿所述散热舱3的轴向设置且为片状，且贯穿所述热交换区7；所述导热桥5其断面的宽度从导热缓冲块9向外侧逐渐增加；所述散热体其宽度从导热缓冲块9向外侧逐渐增缩窄；所述导热体的高度为导流槽深度的57％，散热体断面最宽处的宽度为导热桥断面最宽处宽度的75％，是导热桥断面最窄处的3.2倍。透气孔的总面积为导热体面积的20％。经过测试，这一比例的结构其散热效果最为显著，且可以有效提高散热腔的机械强度。
优选的，所述安装面板1正面设有COB集成LED安装槽10，所述COB集成LED安装槽10边缘的顶部向安装槽中心翻折，形成一环绕安装槽的卡槽11；所述COB集成LED光源模组4设置在COB集成LED安装槽10底部；COB集成LED光源模组4外侧设有嵌入卡槽11中的弹性件。
优选的，所述弹性件包括至少一个金属卡簧12。
进一步的，所述热交换区7和对流区8为可拆卸连接；所述热交换区7的两端面设有多个主固定块13，所述对流区8与热交换区7相接的一端的端面设有与主固定块13一一对应的辅固定块14；所述热交换区7和对流区8通过穿透主固定块13和辅固定块14的螺丝固定。
本实施例中，热交换区每一端设有3个主固定块，分别设置在背盖的两侧和顶部。
更进一步的，热交换区7两端的主固定块13一一对应，对应的主固定块13间通过贯穿热交换区7、与散热舱3轴线平行的加强条15连接；所述主固定块13、辅固定块14和加强条15设置在散热舱3内壁。
实施例2
本实施例提供一种基于热对流的自主散热式COB集成LED灯体，包括安装面板以及设置在安装面板背面的、隆起的背盖，所述安装面板和背盖围合成一散热舱，安装面板上安装有COB集成LED光源模组，所述散热舱中设有多个连接安装面板和背盖的导热桥；所述安装面板的背面还设有多个伸入所述散热舱中的、不与背盖连接的散热体；所述散热舱还设有与外界连通的透气孔。
所述的COB集成LED光源模组可选用任意一种COB封装的LED光源。
进一步的，所述散热舱包括热交换区和设置在热交换区两端的对流区；所述散热体设置在所述热交换区，所述透气口设置在所述对流区底部。
进一步的，所述导热桥沿所述散热舱的轴向设置，所述导热桥为片状；相邻的两个导热桥形成导流槽，所述散热体设置在导流槽中；所述透气孔设置在导流槽的两端。
更进一步的，所述安装面板正面对应所述热交换区的位置设有COB集成LED安装槽；COB集成LED安装槽背面设有突起的导热缓冲块，所述散热体和所述导热桥从所述导热缓冲块表面延伸出；所述导热桥贯穿所述热交换区。
更进一步的，所述导热桥沿所述散热舱的轴向设置，所述导热桥为片状；相邻的两个导热桥形成导流槽，所述散热体设置在导流槽中；所述透气孔设置在导流槽的两端所述散热体沿所述散热舱的轴向设置且为片状，且贯穿所述热交换区；所述导热桥其断面的宽度从导热缓冲块向外侧逐渐增加；所述散热体其宽度从导热缓冲块向外侧逐渐增缩窄；所述导热体的高度为导流槽深度的70％。散热体断面最宽处的宽度为导热桥断面最宽处宽度的50％，是导热桥断面最窄处的1.2倍。透气孔的总面积为导热体面积的40％。
优选的，所述安装面板正面设有COB集成LED安装槽，所述COB集成LED安装槽边缘的顶部向安装槽中心翻折，形成一环绕安装槽的卡槽；所述COB集成LED光源模组设置在COB集成LED安装槽底部；COB集成LED光源模组外侧设有嵌入卡槽中的弹性件。
优选的，所述弹性件为弹性垫片。
进一步的，所述热交换区和对流区为可拆卸连接；可以是螺丝连接也可以是卡扣连接等。
实施例3
本实施例提供一种基于热对流的自主散热式COB集成LED灯体，包括安装面板以及设置在安装面板背面的、隆起的背盖，所述安装面板和背盖围合成一散热舱，安装面板上安装有COB集成LED光源模组，所述散热舱中设有多个连接安装面板和背盖的导热桥；所述安装面板的背面还设有多个伸入所述散热舱中的、不与背盖连接的散热体；所述散热舱还设有与外界连通的透气孔。
进一步的，所述散热体沿散热腔轴向设置，且贯穿散热腔；所述透气口设置在散热腔底部。
进一步的，所述导热桥沿所述散热舱的轴向设置，所述导热桥为片状；相邻的两个导热桥形成导流槽，所述散热体设置在导流槽中。
更进一步的，所述导热桥沿所述散热舱的轴向设置，所述导热桥为片状；相邻的两个导热桥形成导流槽，所述散热体设置在导流槽中；所述透气孔设置在导流槽的两端所述散热体沿所述散热舱的轴向设置且为片状，且贯穿所述热交换区；所述导热桥其断面的宽度从导热缓冲块向外侧逐渐增加；所述散热体其宽度从导热缓冲块向外侧逐渐增缩窄；所述导热体的高度为导流槽深度的30％。
优选的，所述安装面板正面设有COB集成LED安装槽，所述COB集成LED安装槽边缘的顶部向安装槽中心翻折，形成一环绕安装槽的卡槽；所述COB集成LED光源模组设置在COB集成LED安装槽底部；COB集成LED光源模组外侧设有嵌入卡槽中的弹性件。
优选的，所述弹性件包括至少一个金属卡簧。
进一步的，本实施例中面板和背盖为可拆卸连接。
更进一步的，热交换区两端的主固定块一一对应，对应的主固定块间通过贯穿热交换区、与散热舱轴线平行的加强条连接；所述主固定块、辅固定块和加强条设置在散热舱内壁。
实施例4
本实施例提供一种基于热对流的自主散热式COB集成LED灯体，包括安装面板以及设置在安装面板背面的、隆起的背盖，所述安装面板和背盖围合成一散热舱，安装面板上安装有COB集成LED光源模组，所述散热舱中设有多个连接安装面板和背盖的导热桥；所述安装面板的背面还设有多个伸入所述散热舱中的、不与背盖连接的散热体；所述散热舱还设有与外界连通的透气孔。
进一步的，本实施例中的散热体和导热桥沿散热腔的轴向设置；透气孔设置在散热腔的中部的底面。
对比例1
本对比例提供一种基于热对流的自主散热式COB集成LED灯体，包括安装 面板；安装面板上安装有COB集成LED光源模组，面板上设有多个散热片。面板上还设有多个透气孔。
对比例2
本对比例提供一种基于热对流的自主散热式COB集成LED灯体，包括安装面板以及设置在安装面板背面的、隆起的背盖，所述安装面板和背盖围合成一散热舱，安装面板上安装有COB集成LED光源模组，所述散热舱中设有多个连接安装面板和背盖的导热片；所述散热舱还设有与外界连通的透气孔。
散热性能测试
上述实施例和对比例中，COB集成LED光源模组为市售的西铁城CLL050。散热舱的容积为0.2m3.测定点亮10小时内COB集成LED光源模组发光面中心部位温度(热电偶测试，室温25℃)。其结果如下表所示。
实验组 点亮5小时温度(℃) 点亮10小时温度(℃)
实施例1 97.05±0.13 107.15±0.10
实施例2 128.12±0.21 131.33±0.25
实施例3 132.31±0.19 148.21±0.31
实施例4 135.33±0.23 159.92±0.30
对比例1 152.16±0.29 188.30±0.21
对比例2 143.22±0.51 175.96±0.61
灯体强度测试。
上述实施例的灯体均采用市售的铝合金(6061)制成。将背盖朝上水平放置灯体，对灯体上下两侧施加压力。依次增加压力强度，测试灯体高度减少10％(明显变形)时所施加的压力大小。其结果如下表所示。
实验组 变形压力/N
实施例1 4010
实施例2 3120
实施例3 2500
实施例4 2130
以上为本发明的其中具体实现方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些显而易见的替换形式均属于本发明的保护范围。

Claims (10)

  1. 一种基于热对流的自主散热式COB集成LED灯体，包括安装面板(1)以及设置在安装面板(1)背面的、隆起的背盖(2)，所述安装面板(1)和背盖(2)围合成一散热舱(4)，安装面板(1)上安装有COB集成LED光源模组，其特征在于：所述散热舱(4)中设有多个连接安装面板(1)和背盖(2)的导热桥(5)；所述安装面板(1)的背面还设有多个伸入所述散热舱(4)中的、不与背盖(2)连接的散热体；所述散热舱(4)还设有与外界连通的透气孔(6)。
  2. 根据权利要求1所述的基于热对流的自主散热COB集成LED灯体，其特征在于：所述散热舱(4)包括热交换区(7)和设置在热交换区(7)两端的对流区(8)；所述散热体设置在所述热交换区(7)，所述透气口设置在所述对流区(8)底部。
  3. 根据权利要求1或2任一项所述的基于热对流的自主散热式COB集成LED灯体，其特征在于：所述导热桥(5)沿所述散热舱(4)的轴向设置，所述导热桥(5)为片状；相邻的两个导热桥(5)形成导流槽，所述散热体设置在导流槽中；所述透气孔(6)设置在导流槽的两端。
  4. 根据权利要求2所述的基于热对流的自主散热式COB集成LED灯体，其特征在于：所述安装面板(1)正面对应所述热交换区(7)的位置设有COB集成LED安装槽(10)；COB集成LED安装槽(10)背面设有突起的导热缓冲块(9)，所述散热体和所述导热桥(5)从所述导热缓冲块(9)表面延伸出；所述导热桥(5)贯穿所述热交换区(7)。
  5. 根据权利要求4所述的基于热对流的自主散热式COB集成LED灯体，其 特征在于：所述导热桥(5)沿所述散热舱(4)的轴向设置，所述导热桥(5)为片状；相邻的两个导热桥(5)形成导流槽，所述散热体设置在导流槽中；所述透气孔(6)设置在导流槽的两端所述散热体沿所述散热舱(4)的轴向设置且为片状，且贯穿所述热交换区(7)；所述导热桥(5)其断面的宽度从导热缓冲块(9)向外侧逐渐增加；所述散热体其宽度从导热缓冲块(9)向外侧逐渐增缩窄；所述导热体的高度为导流槽深度的30％-70％。
  6. 根据权利要求1或2所述的基于热对流的自主散热式COB集成LED灯体，其特征在于：所述安装面板(1)正面设有LED安装槽(10)，所述COB集成LED安装槽(10)边缘的顶部向安装槽(10)中心翻折，形成一环绕安装槽(10)的卡槽(11)；所述LED光源模组设置在COB集成LED安装槽(10)底部；COB集成LED光源模组外侧设有嵌入卡槽(11)中的弹性件。
  7. 根据权利要求6所述的基于热对流的自主散热式COB集成LED灯体，其特征在于：
    所述弹性件包括至少一个金属卡簧。
  8. 根据权利要求2所述的基于热对流的自主散热式COB集成LED灯体，其特征在于：所述热交换区(7)和对流区(8)为可拆卸连接；所述热交换区(7)的两端面设有多个主固定块(13)，所述对流区(8)与热交换区(7)相接的一端的端面设有与主固定块(13)一一对应的辅固定块(14)；所述热交换区(7)和对流区(8)通过穿透主固定块(13)和辅固定块(14)的螺丝固定。
  9. 根据权利要求8所述的基于热对流的自主散热式COB集成LED灯体，其 特征在于：热交换区(7)两端的主固定块(13)一一对应，对应的主固定块(13)间通过贯穿热交换区(7)、与散热舱(4)轴线平行的加强条连接；所述主固定块(13)、辅固定块(14)和加强条设置在散热舱(4)内壁。
  10. 根据权利要求5所述的基于热对流的自主散热式COB集成LED灯体，其特征在于：所述导热体的高度为导流槽深度的57％，散热体断面最宽处的宽度为导热桥断面最宽处宽度的75％，是导热桥断面最窄处的3.2倍；透气孔的总面积为导热体面积的20％。
PCT/CN2016/084014 2016-05-21 2016-05-31 一种基于热对流的自主散热式cob集成led灯体 WO2017201761A1 (zh)

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