TWI622729B - LED bulb with cooling module - Google Patents

Abstract

An LED bulb having a heat dissipation module includes a circuit unit, an illumination unit and a lamp holder unit, the circuit unit includes a heat blocking plate, an aluminum substrate surrounding the heat blocking plate, and a heat blocking plate a reflective layer on the same side of the aluminum substrate, and a first voltage module and a second voltage module electrically connected to each other, wherein the first and second voltage modules are respectively disposed on the reflective layer and the heat blocking plate. The light-emitting unit includes a plurality of light-emitting diodes disposed on the first surface corresponding to the first substrate and electrically connected to the first voltage module, the lamp holder unit including a heat dissipation module, and a shell surrounding the heat dissipation module The heat dissipation module has a heat conducting plate adjacent to the aluminum substrate, a heat conducting surrounding wall connecting the heat conducting plate, and a heat conducting space defined by the heat conducting plate and the heat conducting surrounding wall. The heat conducting plate has a heat supply plate The via hole passes through the second voltage module, thereby improving the heat dissipation effect.

Description

LED bulb with cooling module

The invention relates to a light bulb, in particular to an LED light bulb with a heat dissipation module.

Referring to FIG. 1 and FIG. 2, a conventional LED bulb includes a circuit unit 11, an illumination unit 12, a socket unit 13, and a lamp cover 14. The circuit unit 11 has an aluminum substrate 111 and is disposed on the aluminum substrate. a first voltage module 112 of the first voltage module 112 and a second voltage module 113 electrically connected to the first voltage module 112. The light emitting unit 12 has a plurality of electrodes disposed on the aluminum substrate 111 and electrically connected to the first voltage module 112. The illuminating diode 121 has a heat conducting plate 131 adjacent to the aluminum substrate 111, a heat conducting surrounding wall 132 connecting the outer periphery of the heat conducting plate 131, and a heat conducting surrounding wall 132 disposed in the heat conducting surrounding wall 132. a soft layer 133 disposed on a side of the heat conducting plate 131 opposite to the aluminum substrate 111, and a heat conducting space 134 defined by the heat conducting surrounding wall 132 and the soft layer 133. The second voltage module 113 is disposed on the heat conducting space 134. The soft layer 133 is opposite to one side of the heat conducting plate 131, and the lamp cover 14 is mounted to the socket unit 13.

In use, the second voltage module 113 converts the AC voltage 220V into an AC voltage of 110V, and the first voltage module 112 converts the AC voltage 110V into a DC voltage that drives the LEDs 121 to emit light, thereby The LED light bulb emits light, and the heat generated by the light-emitting diodes 121 passes through the aluminum substrate 111 and the heat-conducting plate 131, and finally the heat-dissipating wall 132 dissipates heat to the heat-conducting space 134 to achieve heat dissipation. .

However, since the heat generated by the light-emitting diodes 121 also causes the first voltage module 112 to be in a high-temperature environment via the aluminum substrate 111, the first voltage module 112 is prone to heat accumulation due to long-term use. It is too high and damaged, so further improvement of the heat dissipation method is a technology that is still under development.

Accordingly, it is an object of the present invention to provide an LED bulb having a heat dissipation module.

Therefore, the LED bulb with the heat dissipation module of the present invention comprises a circuit unit, a lighting unit, and a lamp holder unit.

The circuit unit includes a heat blocking plate, an aluminum substrate surrounding the outer periphery of the heat blocking plate, a reflective layer covering the same side of the heat blocking plate and the aluminum substrate, and a first voltage module electrically connected to each other. And a second voltage module, the reflective layer has a first surface opposite to the heat blocking plate, the heat blocking plate has a second surface opposite to the reflective layer, the first voltage module and the second voltage mode The light-emitting unit includes a plurality of light-emitting diodes disposed on the first surface corresponding to the first substrate and electrically connected to the first voltage module, the light-emitting unit including the plurality of light-emitting diodes disposed on the first surface and the second surface. a heat dissipation module, and a heat dissipation module adjacent to the outer side of the heat dissipation plate a heat conducting wall extending in the direction of the aluminum substrate, and a heat conducting space defined by the heat conducting plate and the heat conducting surrounding wall to accommodate the second voltage module, the heat conducting plate having a second voltage module Through hole.

The effect of the present invention is that the first voltage module and the second voltage module are respectively disposed on the first surface and the second surface, and the heat generated by the light emitting diodes can pass through the aluminum The substrate is passed through the design of the heat conducting plate to improve the heat dissipation effect.

Referring to FIGS. 3 and 4, an embodiment of an LED light bulb having a heat dissipation module includes a circuit unit 2, a light unit 3, a base unit 4, a fixed unit 5, and a lamp cover 6.

The circuit unit 2 includes a heat blocking plate 21, an aluminum substrate 22 surrounding the outer periphery of the heat blocking plate 21, and a reflective layer 23 covering the same side of the heat blocking plate 21 and the aluminum substrate 22, and electrically connected to each other. A first voltage module 24 and a second voltage module 25, and a header member 26.

The reflective layer 23 has a first surface 231 opposite the heat shield 21. In the embodiment, the reflective layer 23 is used to reflect the light emitted by the light-emitting unit 3, thereby improving the brightness.

The heat blocking plate 21 has a second surface 211 opposite to the reflective layer 23.

The first voltage module 24 and the second voltage module 25 are respectively disposed on the first surface 231 and the second surface 211 . In this embodiment, the first voltage module 24 and the second voltage module 25 are used to convert the AC voltage 100V~240V into a DC voltage that drives the illumination unit 3 to emit light.

The light emitting unit 3 includes a plurality of light emitting diodes (LEDs) 31 disposed on the first surface 231 corresponding to the aluminum substrate 22 and electrically connected to the first voltage module 24.

The lamp holder unit 4 includes a heat dissipation module 41 and a housing 42 surrounding the outer side of the heat dissipation module 41. In the present embodiment, the housing 42 is made of a thermally conductive plastic such as PC material, and can comply with safety regulations.

The heat dissipation module 41 has a heat conducting plate 411 adjacent to one side of the aluminum substrate 22 opposite to the reflective layer 23, a heat conducting surrounding wall 412 extending from the outer peripheral edge of the heat conducting plate 411 away from the aluminum substrate 22, and a heat conducting wall 412 The heat conducting plate 411 and the heat conducting surrounding wall 412 collectively surround the heat conducting space 413 defined to accommodate the second voltage module 25 . In the embodiment, the heat conducting plate 411 is integrally formed with the heat conducting surrounding wall 412, and the heat conduction effect can be improved.

The heat conducting plate 411 has a through hole 414 through which the second voltage module 25 can pass.

The plug member 26 of the circuit unit 2 is disposed on a side of the housing 42 opposite to the heat conducting plate 411 and electrically connected to the second voltage module 25 through the heat conducting space 413 and the via hole 414.

The fixing unit 5 includes a plurality of positioning holes 51 located in one of the aluminum substrate 22 and the heat conducting plate 411, and a plurality of the aluminum substrate 22 and the heat conducting plate 411 are disposed on the other one of the aluminum substrate 22 and the heat conducting plate 411 to be respectively disposed on the fixing hole 5 Positioning post 52 of positioning hole 51. In the embodiment, the positioning holes 51 are located on the aluminum substrate 22 , and the positioning posts 52 are disposed on the heat conducting plate 411 .

The lamp cover 6 is covered by the casing 42 from the outside of the first surface 231 .

In use, the plug member 26 is inserted into a lamp holder (not shown). When the AC voltage provided by the lamp holder is 100V~240V, the first voltage module 24 and the second voltage module are used. 25 converts the alternating voltage into a direct current voltage to drive the light emitting diodes 31 to emit light.

At this time, the heat generated by the LEDs 31 during operation is sequentially transmitted from the aluminum substrate 22 to the heat conducting plate 411 and the heat conducting wall 412, except that the heat conducting wall 412 is responsible for transferring heat simultaneously. Dissipating in the heat conducting space 413 and conducting to the outside through the housing 42. The heat conducting plate 411 can also be used to dissipate heat in the heat conducting space 413 due to being directly adjacent to the heat conducting space 413, since the heat conducting plate 411 The heat conducting surrounding wall 412 is adjacent to the heat conducting space 413, and the heat conducting surrounding wall 412 is adjacent to the heat conductive housing 42, so that the heat dissipation effect is better.

Since the heat dissipation effect of the light emitting diodes 31 is good, the aluminum substrate 22 surrounding the outer periphery of the heat blocking plate 21 does not transfer heat to the heat blocking plate 21 located in the middle, and can avoid being located on the aluminum substrate. The first voltage module 24 and the second voltage module 25 in the center are affected by the high heat of the light-emitting diodes 31, thereby causing the problem of easy damage, thereby improving the service life and saving the cost.

In summary, the first voltage module 24 and the second voltage module 25 are respectively disposed on the first surface 231 and the second surface 211, and the heat generated by the LEDs 31 is generated. The heat conducting plate 411 and the heat conducting surrounding wall 412 can pass through the aluminum substrate 22 without accumulating heat to the heat blocking plate 21, thereby improving the heat dissipation effect and improving the service life. The purpose of the invention.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 2············· Circuit unit 21···· ······ Heat-resisting plate 211········ Second surface 22·················································· ······ First surface 24········· The first voltage module 25····························································· ·· 接件3·································································································· ······ Lamp holder unit 41·········· Heat dissipation module 411········ Thermal conduction plate 412········ Thermal conduction wall 413··· ····· Heat conduction space 414········ Via hole 42························································· ········ Positioning hole 52·········· Positioning post 6·························································· </TABLE>

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a cross-sectional view of a conventional LED bulb; Figure 2 is a perspective exploded view of the conventional LED bulb Figure 3 is a cross-sectional view showing an embodiment of an LED bulb having a heat dissipation module of the present invention; and Figure 4 is an exploded perspective view of the embodiment.

Claims (5)

An LED bulb having a heat dissipation module, comprising: a circuit unit comprising a heat blocking plate, an aluminum substrate surrounding an outer periphery of the heat blocking plate, and a reflective layer covering the same side of the heat blocking plate and the aluminum substrate And a first voltage module and a second voltage module electrically connected to each other, the reflective layer has a first surface opposite to the heat blocking plate, and the heat blocking plate has a second surface opposite to the reflective layer, The first voltage module and the second voltage module are respectively disposed on the first surface and the second surface; a light emitting unit includes a plurality of electrodes disposed on the first surface corresponding to the aluminum substrate and electrically connected to the first voltage The light-emitting diode of the module; and a lamp holder unit, comprising a heat dissipation module, and a housing surrounding the outer side of the heat dissipation module, the heat dissipation module having a reflective layer opposite to the aluminum substrate a heat conducting plate on the side, a heat conducting surrounding wall extending from the outer periphery of the heat conducting plate toward the aluminum substrate, and a heat conducting space defined by the heat conducting plate and the heat conducting surrounding wall to accommodate the second voltage module The heat conducting plate has one available Vias through the second voltage module. The LED light bulb with a heat dissipation module according to claim 1, further comprising a lamp cover that is disposed on the housing. The LED light bulb with a heat dissipation module according to claim 1, wherein the circuit unit further comprises a side disposed on the opposite side of the heat conducting plate of the housing and electrically connected to the conductive space and the through hole through the circuit The plug member of the second voltage module. The LED light bulb with a heat dissipation module according to claim 1, further comprising a fixing unit, wherein the fixing unit comprises at least one positioning hole located in one of the aluminum substrate and the heat conducting plate, and at least one disposed on the aluminum The other of the substrate and the heat conducting plate is disposed through the positioning post of the positioning hole. The LED bulb with a heat dissipation module according to claim 1, wherein the first voltage module and the second voltage module are simultaneously used to convert an AC voltage of 100V to 240V into a DC voltage for driving the illumination unit to emit light.