TWI403673B - Led lamp - Google Patents

Abstract

An LED lamp includes a frame, a heat sink locating at a side of the frame, a plurality of LED modules and an envelope covering these LED modules. The LED lamp further includes a vapor chamber. The heat sink is attached on a bottom surface of the vapor chamber. The LED modules are attached on a top face of the vapor chamber. A working fluid is sealed in the vapor chamber.

Description

Light-emitting diode lamp

The invention relates to a lighting fixture, in particular to a light-emitting diode lamp.

As a new light source, the light-emitting diode light source can not replace the traditional incandescent lamp on a large scale, but it has the advantages of long working life, energy saving and environmental protection, and is generally favored by the market. Moreover, the module composed of the light-emitting diode can generate a high-power, high-brightness light source, which can completely replace the conventional incandescent lamp to achieve indoor and outdoor illumination, and will also replace the traditional incandescent lamp widely and revolutionarily. The light source has become the main light source in line with the theme of energy conservation and environmental protection.

However, the greater the power and brightness, the greater the heat generated by the LED or its module, and it is difficult to dissipate in a relatively small volume of the LED package. Therefore, the light-emitting diode still has a large heat-dissipation technology bottleneck, which is also the key point for the current market breakthrough of high-power, high-brightness light-emitting diode lamps. At present, the heat dissipation scheme commonly used in the industry is to provide a heat sink in the lamp. The heat sink is generally made of a metal material with good thermal conductivity, and has a plurality of heat dissipation fins formed on the bottom plate and the bottom plate.

However, for some high-power light-emitting diode lamps, the heat generation is high, and the heat sink made of metal material alone is difficult to meet the heat dissipation requirement, so Need to be further improved.

In view of this, it is necessary to provide a light-emitting diode lamp having a heat equalizing plate.

A light-emitting diode lamp includes a light stand, a heat sink on one side of the light stand, a plurality of light-emitting diode modules, and a light cover covering the light-emitting diode modules, the light-emitting diode lamp The heat-receiving plate has a bottom surface attached to one side of the heat sink, and a top surface of the heat-receiving plate is attached to the light-emitting diode module, and the heat-receiving plate is sealed inside. fluid.

Compared with the prior art, the light emitting diode lamp is provided with a heat equalizing plate between the light emitting diode module and the heat sink, and the heat equalizing plate can distribute heat to the heat sink in a timely and effective manner to be distributed to the surroundings. Going in the environment to improve heat dissipation efficiency.

10‧‧‧Homothermal board

16‧‧‧ fluid passage

11, 11a, 11b, 11c‧‧‧ lower casing

20‧‧‧ radiator

13, 13a, 13b‧‧‧vacuum space

24, 26‧‧ ‧ heat sink

14, 14b, 14c‧‧‧ vacuum chamber

29‧‧‧through hole

19, 19b, 19c‧ ‧ reinforced ribs

32‧‧‧Lighting diode module

15‧‧‧floor

322‧‧‧Lighting diode

17‧‧‧ side wall

340‧‧‧ frame

22‧‧‧ board

344‧‧‧容口

28‧‧‧ Space

42‧‧‧light frame

30‧‧‧Light source module

422‧‧ ‧ thread blind hole

320‧‧‧ boards

50‧‧‧shade

34‧‧‧Light guide

342‧‧‧Light guide plate

40‧‧‧Light stand

420‧‧‧ openings

44‧‧‧ housing

60‧‧‧Gland

1 is a perspective exploded view of a first embodiment of a light-emitting diode lamp of the present invention.

2 is an inverted view of the LED lamp of FIG. 1.

3 is an exploded perspective view of the heat equalizing plate of the light-emitting diode lamp of FIG. 1.

4 is a perspective view of a lower casing of a soaking plate of a second embodiment of the light-emitting diode lamp of the present invention.

Fig. 5 is a perspective view showing the lower casing of the soaking plate of the third embodiment of the light-emitting diode lamp of the present invention.

6 is a lower casing of a soaking plate of a fourth embodiment of the light-emitting diode lamp of the present invention; Stereo picture.

Referring to FIG. 1 and FIG. 2 , the LED lamp of the first embodiment of the present invention includes a heat equalizing plate 10 , a heat sink 20 disposed under the heat equalizing plate 10 and attached to the heat equalizing plate 10 , and a sticker a light source module 30 disposed on a top surface of the heat equalizing plate 10, the heat sink 20 being mounted on one side of a light frame 40 and sandwiching the light source module 30 and the heat equalizing plate 10 on the heat sink 20 and the lamp Between the shelves 40. A transparent lamp cover 50 is mounted on the other side of the lamp holder 40 through a gland 60 and covers the light source module 30.

Referring to FIG. 3 , the heat equalizing plate 10 has a rectangular shape and is a phase change heat conducting housing with a working fluid sealed therein, and includes a lower housing 11 and a top plate 12 disposed on the lower housing 11 . The lower casing 11 and the top plate 12 together form a vacuum space 13. The lower casing 11 includes a rectangular bottom plate 15, four side walls 17 extending vertically upward from the periphery of the bottom plate 15, and two sets of reinforcing ribs 19 extending laterally and vertically from the bottom plate 15 to enhance the soaking heat. The strength of the board 10. Each set of reinforcing ribs 19 extends from one of the side walls 17 to the other side wall 17 corresponding to the side wall 17. The periphery of the top plate 12 is in close contact with the four side walls 17. The vertical height of the reinforcing ribs 19 is the same as the height of the four side walls 17 so that the top plate 12 and the reinforcing ribs 19 are in close contact with each other, so that the reinforcing ribs 19 form a vacuum together with the lower casing 11 and the top plate 12. The space 13 is divided into a plurality of vacuum chambers 14. In the present embodiment, the vacuum space 13 is divided into four vacuum chambers 14 by two sets of reinforcing ribs 19. In other embodiments, the vacuum space 13 may not be split or divided into other numbers of vacuum chambers 14. As shown in FIG. 4, the housing 1a of the heat equalizing plate 10 of the second embodiment of the LED lamp of the present invention is formed, and the lower casing 11a and the top plate 12 are formed together. The vacuum space 13a is not divided, that is, no reinforcing rib is provided in the vacuum space 13a. As shown in FIG. 5, the lower casing 10b of the heat equalizing plate 10 of the third embodiment of the present invention, the vacuum space 13b formed by the lower casing 11b and the top plate 12 is laterally arranged with a set of reinforcing ribs. 19b is divided into two vacuum chambers 14b. 6 is a lower housing 10c of the heat equalizing plate 10 of the fourth embodiment of the light-emitting diode lamp of the present invention, and the vacuum space 13 is divided into six vacuum chambers by three sets of reinforcing ribs 19c arranged laterally and longitudinally. Body 14c. Each set of reinforcing ribs 19 is spaced apart from each other with a plurality of fluid passages 16 that allow the working fluids in adjacent vacuum chambers 14 to communicate with each other.

Referring to FIG. 1 and FIG. 2 , the heat sink 20 is made of a metal material with good thermal conductivity, and includes a plate body 22 and a plurality of parallel spaced fins extending vertically upward from the upper surface of the plate body 22 . 24 and a plurality of parallel spaced fins 26 extending vertically downward from the lower surface of the plate body 22. A heat sink 24 is not disposed in the upper portion of the upper surface of the plate body 22 to form a space 28, and the heat equalizing plate 10 is received in the space 28 and attached to the upper surface of the plate body 22. The plate body 22 is provided with a plurality of through holes 29 around the heat equalizing plate 10 for fasteners such as screws to pass through the through holes 29, and the heat sink 20 is screwed onto the lamp holder 40.

Referring to FIG. 1 and FIG. 2 , the light source module 30 includes a plurality of LED modules 32 that are disposed on the top surface of the heat equalizing plate 10 and are disposed on the LED module 32 . And mounted on one of the light guides 34 on the top surface of the heat equalizing plate 10. Each of the LED modules 32 includes a rectangular circuit board 320 and a plurality of LEDs 322 attached to the circuit board 320. The light guide cover 34 includes a frame 340 having an opening and a crosswise extension from the inner side of the frame 340 laterally and longitudinally. Number of light guide plates 342. The light guide plate 342 covers the opening and divides the opening into a plurality of receiving openings 344, and each of the receiving openings 344 and the light emitting diode 322 of the LED module 32 disposed under the light guiding cover 34 Corresponding to and corresponding to the corresponding light-emitting diode 322.

Referring to both FIG. 1 and FIG. 2, the lamp holder 40 includes a rectangular lamp frame 42 and a housing 44 integrally formed from one end of the lamp frame 42 for wiring or mounting. A driving circuit module is received in the housing 44 for supplying power to the LED module 32. The lamp frame 42 is a frame having an opening 420. The bottom of the lamp frame 42 is provided with a plurality of threaded blind holes 422 corresponding to the through holes 29 of the heat sink 20, so that a fastener such as a screw passes through the through hole 29 and Thread blind hole 422 screw lock. The cap 60 is mounted on the top of the lamp frame 42 and presses the lamp cover 50 between the gland 60 and the lamp frame 42 to cover the opening 420 of the lamp frame 42.

When the above-mentioned light-emitting diode lamp is used, the heat generated by the light-emitting diode 322 can be directly absorbed by the heat-receiving plate 10 and phase-changed by the working fluid in the heat-receiving plate 10 to uniformly distribute the heat to the heat sink 20, and then Heat is dissipated into the surrounding air by the fins 24, 26 on the heat sink 20.

Compared with the prior art, the above-mentioned light-emitting diode lamp is provided with a heat transfer plate 10 for phase change heat transfer between the light-emitting diode module 32 and the heat sink 20, and the heat spread plate can distribute heat more timely and effectively. The heat sink 20 is radiated to the surrounding environment, thereby improving heat dissipation efficiency. In addition, a plurality of reinforcing ribs 19 disposed in the heat equalizing plate 10 reinforce the strength of the heat equalizing plate 10.

It can be understood that one of the lower casing 11 and the top plate 12 of the above heat equalizing plate 10 is one of the above. Or the inner wall surface of both is provided with a capillary structure to accelerate the return of the working fluid in the heat equalizing plate 10.

It can be understood that the reinforcing ribs 19 may be solid or hollow metal blocks, or may be a capillary having a capillary structure or other members having a capillary structure, such as a block sintered from metal powder.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10‧‧‧Homothermal board

22‧‧‧ board

29‧‧‧through hole

32‧‧‧Lighting diode module

322‧‧‧Lighting diode

340‧‧‧ frame

344‧‧‧容口

50‧‧‧shade

60‧‧‧Gland

20‧‧‧ radiator

24, 26‧‧ ‧ heat sink

28‧‧‧ Space

30‧‧‧Light source module

320‧‧‧ boards

34‧‧‧Light guide

342‧‧‧Light guide plate

40‧‧‧Light stand

Claims (11)

A light-emitting diode lamp includes a light stand, a heat sink on one side of the light stand, a plurality of light-emitting diode modules, and a light cover covering the light-emitting diode modules. The improvement is as follows: a heat-receiving plate, the bottom surface of the heat-receiving plate is attached to one side of the heat sink, and the top surface of the heat-receiving plate is attached to the light-emitting diode module, and the heat-receiving plate is sealed with a working fluid. A vacuum space is formed in the heat equalizing plate, the working fluid is sealed in the vacuum space, and the working fluid undergoes a phase change when heated. The heat equalizing plate is provided with at least one reinforcing rib, and the reinforcing rib divides the vacuum space into a plurality of vacuums. Cavity. The illuminating diode lamp of claim 1, wherein each of the reinforcing ribs is provided with a plurality of fluid passages spaced apart from each other, and working fluids in adjacent vacuum chambers circulate through the fluid passages. The light-emitting diode lamp of claim 1, wherein the heat-receiving plate comprises a lower casing and a top plate disposed on the lower casing, the lower casing comprising a bottom plate and a periphery of the bottom plate Four side walls extending vertically upward, each of the reinforcing ribs extending from one of the side walls to the other side wall corresponding to the side wall. The illuminating diode lamp according to claim 3, wherein the inner wall surface of one or both of the lower casing and the top plate of the heat equalizing plate is provided with a capillary structure. The illuminating diode lamp of claim 3, wherein the vertical height of each of the reinforcing ribs is the same as the height of the four side walls of the lower casing so that the top plate is in close contact with the reinforcing ribs. The illuminating diode lamp according to any one of claims 3 to 5, wherein each of the reinforcing ribs is formed by the bottom plate extending vertically upward. The illuminating diode lamp according to any one of the preceding claims, wherein the heat sink comprises a plate body, and the heat equalizing plate is attached to the upper surface of the central portion of the plate body. The illuminating diode lamp of claim 7, wherein the plate body is located on the upper surface of the two sides of the heat absorbing plate and extends vertically upwards with a plurality of fins arranged in parallel, the lower surface of the plate body is vertically oriented. A heat sink with a plurality of parallel spaced intervals is extended. The light-emitting diode lamp of claim 8, further comprising a light guide cover covering the light-emitting diode module, the light guide cover comprising a frame having an opening and the frame The inner side of the body extends transversely and longitudinally and covers a plurality of light guide plates of the opening, and the light guide plates divide the opening into a plurality of receiving openings. The light-emitting diode lamp of claim 9, wherein the light-emitting diode module comprises a plurality of light-emitting diodes, each of the receiving openings corresponding to each of the light-emitting diodes and accommodating the light-emitting diodes Polar body. The light-emitting diode lamp of claim 10, wherein the light frame comprises a light frame, the heat sink is mounted at the bottom of the light frame, and the light-emitting diode lamp further comprises a gland, the pressure A cover is mounted on the top of the light frame and presses the light cover between the cover and the light frame.