WO2018049569A1

WO2018049569A1 - Led lamp

Info

Publication number: WO2018049569A1
Application number: PCT/CN2016/098919
Authority: WO
Inventors: 黄晓华; 李渊
Original assignee: 深圳市瑞梓光电科技有限公司
Priority date: 2016-09-13
Filing date: 2016-09-13
Publication date: 2018-03-22

Abstract

Disclosed is an LED lamp, comprising a heat dissipation device (1) and a PCB (2) tightly attached to the heat dissipation device (1), with a thermally conductive grease layer (3) being provided between the heat dissipation device (1) and the PCB (2), the thermally conductive grease layer (3) at least comprising a thermally conductive graphene adhesive. In this way, the thermally conductive grease layer (3) can be used to effectively transfer the heat generated by the PCB (2) to the heat dissipation device (1) so as to dissipate the heat. Moreover, the thermally conductive grease layer (3) at least has the thermally conductive graphene adhesive, wherein the heat dissipation efficiency of the thermally conductive graphene adhesive is relatively high. Using graphene as a thermally conductive carrier, reliability is improved, the amount of heat dissipation material used can be reduced, the whole lamp structure becomes simpler and more integrated, and the service life of the LED lamp is prolonged.

Description

LED lamp

Technical field

The invention relates to the field of lighting technology, and more particularly to an LED lamp.

Background technique

With the development of technology, LED lamps are rapidly spreading in the field of lamps. LED lamps have many advantages over ordinary incandescent lamps, such as energy saving, long life, reliable and durable, and low maintenance costs. In the application of LED luminaires, in order to meet the lighting requirements, a plurality of LEDs are generally concentrated in one LED luminaire. Therefore, LED luminaires generate a large amount of heat during operation, and if these heats are not dissipated from the luminaire in time, the luminaires will be The temperature rises and the lamp works for a long time under high temperature conditions, which not only affects the working life and light efficiency of the LED lamp, but also has potential safety hazards.

Therefore, how to make the heat dissipation of the lamp faster and the heat dissipation effect become a problem that needs to be solved.

Summary of the invention

The invention provides an LED lamp with faster heat dissipation and better heat dissipation effect.

The object of the present invention is achieved by the following technical solutions:

An LED lamp includes a heat dissipating device and a PCB board that is closely attached to the heat dissipating device. A heat conductive grease layer is disposed between the heat dissipating device and the PCB board, and the thermal conductive grease layer comprises at least a graphene thermal conductive adhesive.

Preferably, the thermal grease layer further comprises an alumina thermal conductive adhesive or/and a copper thermal conductive adhesive. The thermal grease layer can also be made of alumina thermal conductive glue or copper thermal conductive adhesive, or mixed with graphene thermal conductive adhesive, which can combine the advantages of each thermal conductive material to make the thermal conductive grease layer more in insulation, thermal conductivity and adhesion. A good balance, at the same time, users can also adjust according to the actual demand preferences, thus providing a more versatile, wider range of thermal grease layers, more in line with market expectations.

Preferably, the heat dissipation device includes a heat dissipation substrate, the PCB board is in close contact with the heat dissipation substrate, the thermal grease layer is located between the heat dissipation substrate and the PCB board, and the heat dissipation substrate is opposite to the PCB board. At least two parallel heat radiating ribs are provided on one side. In this way, the heat generated by the PCB board can be transmitted to the heat dissipation substrate, and the heat dissipation area can be enlarged by the heat dissipation rib to accelerate the heat dissipation device. Heat dissipation efficiency, a large number of heat dissipation ribs can dissipate heat more quickly, and the heat dissipation ribs are arranged in parallel, which can form a flat flow in the air, accelerate the flow of heat, and dissipate heat more quickly.

Preferably, the heat dissipation rib comprises a first heat sink and a second heat sink, and the first heat sink and the second heat sink are connected to each other at one end, and the other end is provided with an opening toward the heat dissipation bottom plate. In this way, the heat on the heat dissipation substrate can be transmitted through the opening to between the first heat sink and the second heat sink, and then the first heat sink and the second heat sink can be used for faster heat dissipation, and the opening arrangement not only allows heat dissipation. The ribs can absorb the heat of the heat dissipation substrate more quickly and efficiently, and the first heat sink and the second heat sink are separately cooled, and the heat dissipation efficiency is higher.

Preferably, the LED lamp comprises a power supply device, the power supply device is adjacent to the outermost heat dissipation rib, and a power supply bracket is connected between the power supply device and the outermost heat dissipation rib, and the power supply bracket includes a heat dissipation rib. a first fixing portion connected and a second fixing portion for fixing the power supply device. This arrangement can facilitate the heat dissipation of the power supply device, allow the power supply device to be adjacent to the heat dissipation ribs, accelerate the heat dissipation of the power supply device, solve the heat dissipation problem of the power supply, allow the power supply device to dissipate heat through the heat dissipation device, and reduce the amount of material used for the heat dissipation body.

Preferably, the heat dissipation rib is provided with a junction box connected to the power supply device, and the heat dissipation rib is connected with the junction box fixing frame between the junction box, and between the junction box fixing frame and the heat dissipation base plate. A fixing stud is provided, and the junction box fixing bracket is fixed to the fixing stud by screws, and the junction box is fixed on the junction box fixing frame. In this way, power input lines, connectors, and the like can be built therein to make the wiring more tidy, thereby reducing the malfunction of the luminaire.

Preferably, the junction box includes a junction box top cover, the junction box top cover is provided with a hook, the hook is provided with a hook bolt, and the junction box is provided with a hook nut, A hook bolt is engaged with the hook nut through the junction box top cover. In this way, the luminaire can be installed by the hook, and the fixing of the hook is safe and stable.

Preferably, the junction box is provided with a cable fixing head for fixing a cable, and a waterproof joint is installed in the cable fixing head. This allows the cable to be stably installed in the junction box while still being waterproof.

Preferably, the hook is provided with a locking screw that closes the hook opening, and the junction box includes a junction box side cover, and the junction box side cover is located away from the side of the power supply device. In this way, after installing the lamp through the hook, the hook can be locked by the locking screw to prevent the lamp from accidentally falling off, so that the lamp is more safe, and the side cover of the junction box can be easily repaired.

Preferably, the LED board is provided with an LED lamp bead, and a lamp cover is disposed under the PCB board, and a first waterproof rubber ring is disposed between the PCB board and the lamp cover, and the lamp cover is provided with a closed A glass cover plate of the lamp cover, a second waterproof rubber ring is disposed between the glass cover plate and the lamp cover, and the lamp cover is made of metal material or transparent plastic. This will make the luminaire more waterproof.

In the LED lamp of the present invention, a thermal conductive grease layer is disposed between the heat dissipating device and the PCB board, and the thermal grease layer includes at least a graphene thermal conductive adhesive. In this way, the thermal grease layer can be used to transfer the heat of the PCB board to the heat dissipating device to dissipate heat, and at least the graphene thermal conductive adhesive is contained in the thermal grease layer, and the graphene thermal conductive adhesive has higher heat dissipation efficiency. For the heat-conducting carrier, the reliability is higher, and the system integration of the photoelectric heat is realized in a breakthrough manner, so that the whole lamp structure becomes simpler and more integrated, and the performance, quality, production efficiency, cost and the like are optimized. This can reduce the amount of heat-dissipating materials used, reduce material costs, and extend the life of LED lamps. And under the same conditions, higher power LED luminaires can be used to provide higher brightness illumination.

DRAWINGS

1 is an exploded perspective view of an LED lamp according to an embodiment of the present invention;

2 is a perspective view of an LED lamp according to an embodiment of the present invention;

3 is a top plan view of an LED lamp according to an embodiment of the present invention;

4 is a side view of an LED lamp according to an embodiment of the present invention;

Figure 5 is a bottom plan view of an LED lamp in accordance with an embodiment of the present invention.

Reference mark:

1-heat sink, 2-PCB board, 3-thermal grease layer, 4-power supply unit, 5-junction box, 10-heating base plate, 11-heat dissipation ribs, 12-first heat sink, 13-second heat sink, 14-opening, 21-LED lamp bead, 22-shade, 23-first waterproof apron, 24-glass cover, 25-second waterproof apron, 40-power bracket, 41-first fixing, 42- Second fixing part, 50-junction box fixing frame, 51-fixing stud, 52-junction box top cover, 53-hook, 54-hook bolt, 55-hook nut, 56-locking screw, 60- Cable fixing head, 61-waterproof connector, 62-junction box side cover, 70-protrusion, 71-glass fixing buckle, 72-screw, 73-scratch resistant.

detailed description

In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship of the "bottom", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present invention and simplifying the description, and does not indicate or imply the indicated device. Or the components must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as being limits. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated. In addition, the term "comprises" and its variations are intended to cover a non-exclusive inclusion.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

The invention will now be further described with reference to the drawings and preferred embodiments.

As shown in FIG. 1 to FIG. 5, the present invention discloses an LED lamp comprising a heat dissipating device 1 and a PCB board 2 closely attached to the heat dissipating device 1. The heat dissipating device 1 and the PCB board 2 are provided with heat conduction. The lipid layer 3, the thermal grease layer comprises at least a graphene thermal conductive adhesive.

Thus, the heat conductive grease layer 3 can be used to efficiently transfer the heat generated by the PCB 2 to the heat sink 1 to dissipate heat, and at least the graphene thermal conductive adhesive is contained in the thermal grease layer 3, and the graphene thermal conductive adhesive has higher heat dissipation efficiency. Graphene is used as a heat-conducting carrier, and the reliability is higher. At the same time, the system integration of photoelectric heat is realized in a breakthrough manner, which makes the whole lamp structure simpler and more integrated, and at the same time, performance, quality, production efficiency, cost and the like. Have been optimized. This can reduce the amount of heat-dissipating materials used, reduce material costs, and extend the life of LED lamps. And under the same conditions, higher power LED luminaires can be used to provide higher brightness illumination.

The thermal grease layer 3 also includes an alumina thermal paste or/and a copper thermal paste. The thermal grease layer 3 can also be used with an alumina thermal conductive adhesive or a copper thermal conductive adhesive, or mixed with a graphene thermal conductive adhesive, so that the advantages of the respective thermally conductive materials can be integrated to make the thermal conductive grease layer 3 in insulation, thermal conductivity and adhesion. A better balance can be achieved, and users can also adjust according to actual demand preferences, thus providing a more versatile and wider range of thermal grease layers, which is more in line with market expectations.

The heat dissipating device 1 includes a heat dissipating substrate 10, the PCB board 2 is in close contact with the heat dissipating substrate 10, and the thermal grease layer 3 is located between the heat dissipating substrate 10 and the PCB board 2, the heat dissipating substrate 10 and the PCB board 2 opposite sides are provided with at least two heat dissipating ribs 11 which are parallel to each other. In this way, after the heat of the PCB 2 is transmitted to the heat dissipation substrate 10, the heat dissipation area is enlarged by the heat dissipation ribs 11, thereby accelerating the heat dissipation efficiency of the heat dissipation device 1, and the number of heat dissipation ribs 11 can dissipate heat more quickly. And the heat dissipating ribs 11 are arranged in parallel, which can form a flat flow in the air, accelerate the flow of heat, and dissipate heat more quickly. The heat dissipating ribs 11 can be directly exposed to the air, which can speed up the heat dissipation, and can also be provided with a dust cover to prevent impurities, dust and the like from entering. The PCB board 2 and the heat dissipation base plate 10 can be connected by screws, rivets, buckles, etc., and the screws can be easily disassembled and repaired, which is more convenient.

The heat dissipating rib 11 includes a first fin 12 and a second fin 13 , and the first fin 12 and the second fin 13 are connected to each other at one end, and the other end is provided with an opening 14 facing the heat dissipating bottom plate 10 . Thus, the heat on the heat dissipation substrate 10 can be transmitted through the opening 14 between the first heat sink 12 and the second heat sink 13, and then the first heat sink 12 and the second heat sink 13 can be used for faster heat dissipation. The arrangement of the opening 14 not only allows the heat dissipating ribs 11 to absorb the heat of the heat dissipating bottom plate 10 more quickly and efficiently, but also dissipates the first heat dissipating fins 12 and the second heat dissipating fins 13 separately, and the heat dissipating efficiency is higher.

The LED lamp includes a power supply device 4, the power supply device 4 is adjacent to the outermost heat dissipation rib 11, and a power supply bracket 40 is connected between the power supply device 4 and the outermost heat dissipation rib 11, and the power supply bracket 40 includes The first fixing portion 41 to which the heat dissipation ribs 11 are connected and the second fixing portion 42 for fixing the power supply device 4 are provided. In this way, the heat dissipation of the power supply device 4 can be facilitated, the power supply device 4 is adjacent to the heat dissipation ribs 11, the heat dissipation of the power supply device 4 is accelerated, the heat dissipation problem of the power supply is solved, the power supply device 4 is dissipated through the heat dissipation device 1, and the heat dissipation body can be reduced. Material usage.

The heat dissipation rib 11 is provided with a junction box 5 connected to the power supply device 4, and the heat dissipation rib 11 and the junction box 5 are connected with a junction box fixing frame 50, the junction box fixing frame 50 and the heat dissipation bottom plate. A fixing stud 51 is provided between the 10, and the junction box fixing frame 50 is fixed to the fixing stud 51 by screws, and the junction box 5 is fixed to the junction box fixing frame 50. In this way, power input lines, connectors, and the like can be built therein to make the wiring more tidy, thereby reducing the malfunction of the luminaire. A wire or cable connection is provided between the power supply unit 4 and the junction box 5. The wires of the power supply box can also be connected to the PCB board 2 to supply power to the lamp.

The junction box 5 includes a junction box cover 52. The junction box cover 52 is provided with a hook 53. The hook 53 is provided with a hook bolt 54. The junction box 5 is provided with a hook nut 55. The hook bolt 54 is engaged with the hook nut 55 through the junction box top cover 52. In this way, the luminaire can be mounted by the hook 53, and the fixing of the hook 53 is safe and stable. The junction box cover 52 is of course provided with a through hole with the hook bolt 54. After the hook bolt 54 is engaged with the hook nut 55, the junction box cover 52 can be clamped, so that the fixture can be lifted by the hook 53. Install it. In this embodiment, a wire tube may be used instead of the hook to install the lamp, and the wire is inserted into the wire tube. This will enhance the mechanical strength of the conduit, making the fixture more stable and safe after installation.

A cable fixing head 60 for fixing a cable is disposed in the junction box 5, and a waterproof joint 61 is mounted in the cable fixing head 60. This makes it possible to stably install the cable in the junction box 5 while also being waterproof. Of course, the junction box 5 is provided with a through hole for the cable fixing head 60 to be mounted. The waterproof connector 61 can be fixed in the cable fixing head 60 or outside the junction box 5 or in the junction box 5.

The hook 53 is provided with a lock screw 56 that closes the hook opening, and the junction box 5 includes a junction box side cover 62 that is located on a side away from the power supply unit 4. In this way, after the lamp is installed by the hook 53, the hook 53 can be locked by the locking screw 56 to prevent accidental falling off of the lamp, and the lamp is more safe, and the side cover 62 of the junction box can be conveniently arranged for maintenance.

An LED bead 21 is disposed on the PCB 2, and a lamp cover 22 is disposed under the PCB 2. A first waterproof rubber ring 23 is disposed between the PCB 2 and the lamp cover 22, and the lamp cover 22 is disposed on the lamp cover 22. The glass cover 24 of the lamp cover 22 is closed, and a second waterproof rubber ring 25 is disposed between the glass cover 24 and the lamp cover 22. The lamp cover 22 is made of metal or transparent plastic, and the metal material can be better. Reflectiveness, such as polished copper or aluminum alloy, transparent plastic is brighter, and the material is lighter, convenient for transportation and installation. This will make the luminaire more waterproof. There are many LED lamp beads 21, which can improve the brightness of the LED lamps. The lamp cover 22 can be directly fixed to the heat dissipation base plate 10 by screws, rivets, snaps, or the like, or fixed on the PCB board 2. In order to improve the heat dissipation efficiency, the heat dissipation substrate 10 is generally made of a metal material, such as an aluminum alloy or a ferroalloy. Therefore, the mechanical strength of the heat dissipation substrate 10 is higher, and the components such as the lamp cover 22 are more stably fixed on the heat dissipation substrate 10. The outer side of the lamp cover 22 is provided with a horizontally extending protrusion 70. After the glass cover 24 and the protrusion 70 are flattened, a glass fixing buckle 71 is provided to fasten the glass cover 24 and the protrusion 70, and then the screw 72 is used for screwing. Further tightening after screwing, the glass cover 24 and the projection 70 are more stably fixed. In order to prevent damage to the protrusion 70 or the glass cover 24 when the screw 72 is screwed, and damage to the protrusion 70 or the glass cover 24 by the glass fixing buckle 71, the glass fixing buckle 71 and the glass cover may be simultaneously provided. The plate 24 and the anti-scratch sheet 73 between the glass fixing button 71 and the protrusion 70 protect the glass cover 24 and the protrusion 70, and the glass fixing button 71 can also fix the glass cover 24 and the protrusion 70. stable.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

An LED lamp, comprising: a heat dissipating device and a PCB board closely attached to the heat dissipating device; a heat conducting grease layer is disposed between the heat dissipating device and the PCB board, and the thermal grease layer comprises at least graphene heat conduction gum.
The LED lamp according to claim 1, wherein the thermal grease layer further comprises an alumina thermal conductive adhesive or/and a copper thermal conductive adhesive.
The LED lamp of claim 1 , wherein the heat dissipating device comprises a heat dissipating bottom plate, the PCB board is in close contact with the heat dissipating bottom plate, and the thermal grease layer is located on the heat dissipating bottom plate and the PCB board Between the other side of the heat dissipation substrate opposite to the PCB board, at least two heat dissipation ribs parallel to each other are disposed.
The LED lamp of claim 3, wherein the heat dissipation rib comprises a first heat sink and a second heat sink, the first heat sink and the second heat sink are connected to each other at one end, and the other end is provided An opening facing the heat dissipation substrate.
The LED lamp according to claim 3, wherein the LED lamp comprises a power supply device, the power supply device is adjacent to the outermost heat dissipation rib, and the power supply device is disposed between the outermost heat dissipation rib. There is a power bracket connection, and the power bracket includes a first fixing portion connected to the heat dissipation rib and a second fixing portion for fixing the power supply device.
The LED lamp according to claim 5, wherein the heat dissipation rib is provided with a junction box connected to the power supply device, and the junction box is disposed between the heat dissipation rib and the junction box A fixing stud is disposed between the junction box holder and the heat dissipating bottom plate, and the junction box fixing frame is fixed to the fixing stud by screws, and the junction box is fixed on the junction box fixing frame.
The LED lamp according to claim 6, wherein the junction box comprises a junction box top cover, the connection box top cover is provided with a hook, and the hook is provided with a hook bolt. The junction box is provided with a hook nut, and the hook bolt passes through the junction box top cover to cooperate with the hook nut.
The LED lamp according to claim 7, wherein the junction box is provided with a cable fixing head for fixing a cable, and a waterproof joint is installed in the cable fixing head.
The LED lamp according to claim 7, wherein the hook is provided with a lock screw that closes the hook opening, the junction box includes a junction box side cover, and the junction box side cover Located on the side away from the power supply unit.
An LED lamp according to any one of claims 1 to 9, characterized in that An LED lamp bead is disposed on the PCB board, and a lamp cover is disposed under the PCB board, and a first waterproof rubber ring is disposed between the PCB board and the lamp cover, and the lamp cover is provided with a glass cover that closes the lamp cover A second waterproof rubber ring is disposed between the glass cover and the lamp cover, and the lamp cover is made of metal or transparent plastic.