TWI597456B - Heat sink for high power light emitting diode - Google Patents

Description

High power LED heat sink

The invention relates to an LED heat sink device, in particular to a high power LED heat sink device for improving heat dissipation efficiency.

Because high-power LED (High Power LED) is a high-performance and lightweight new light source, in addition to LED energy saving, long life and stable characteristics, it also has the brightness equivalent to the traditional light source, even in efficiency. It is far superior to existing incandescent lamps and halogen bulbs, and is closer to the efficiency of High Pressure Sodium-lamp (HPS). It has been widely used in street lamps, factories, hypermarkets, indoors and outdoors or stadiums.

In order to achieve the high reliability and related performance requirements of high-power LEDs, most manufacturers will use high-power LED chips with better reliability. In other words, the management of heat is a very important issue in the use of high-power LED chips. Therefore, a high-power LED LED lamp generates a large amount of heat energy, and the heat dissipation design must extend the life of the LED lamp.

Generally, the conventional technology can solve the heat dissipation problem by using two active or passive heat dissipation systems. The active heat dissipation system is complicated, and a fan is usually used to forcibly dissipate heat, but the disadvantage is that there is a problem of running noise and its service life. Once the fan fails, the LED luminaire may burn out quickly, and the problem of the gas cooling path must also be considered. Passive cooling system is characterized by the use of passive fins as the main shaft, which is quickly designed by using a metal material with good heat conduction as a heat sink. Heat is discharged. However, due to the installation and bonding technology between the metal heat sink and the LED lamp, the heat dissipation efficiency is affected. The common problem is that the heat sink has been installed but cannot effectively dissipate heat, and finally the LED lamp is still damaged.

In view of this, how to improve the heat dissipation problem for the shortcomings of the conventional high-power LED lamps is also the goal and direction that the relevant industry must strive to develop and break through, which is the direction that the inventors intend to study and improve.

One of the objects of the present invention is to provide a high-power LED heat sink that integrates an active and passive heat dissipation system to improve heat dissipation efficiency.

Another object of the present invention is to provide a high-power LED heat sink that utilizes the material of the metal heat-dissipating fan itself and the cooling airflow generated thereby to accelerate heat dissipation efficiency.

To achieve the above objective, the present invention provides a high power LED heat sink comprising a metal base, a metal fan module and an LED module. The metal base has a certain sub-seat and a central hole, and the stator seat is disposed at the periphery of the central hole. The metal fan module is placed inside the metal base. The metal fan module includes a plurality of cooling fans, a wheel barrel connecting the cooling fans, and a rotating pivot disposed on the wheel barrel and positioned at the center hole, wherein the wheel barrel further has a rotor disposed opposite to the stator seat. The LED module is disposed on the outer side of the wheel tube, and the LED module can rotate or rotate together with the metal fan module, wherein the LED module is further connected to a power supply unit.

Preferably, the outer side of the wheel tube further defines a recess, the LED module has an LED seat body disposed in the groove and a bearing located in the LED block body, the bearing follows the wheel barrel The LED base rotates.

Preferably, the LED module further comprises an LED lamp and a circuit layer connecting the LED lamp, wherein the circuit layer is disposed on the LED holder.

Preferably, one end of the power supply unit is connected to the circuit layer, and the other end is electrically connected to an external power source. The power supply unit is a conductive sheet, a wire or a flexible circuit board.

Preferably, the LED module further comprises an LED lamp and a circuit layer connecting the LED lamp, and the circuit layer is further provided with at least one conductive pad.

100‧‧‧LED heat sink

110‧‧‧Metal base

120‧‧ ‧ Stator seat

130‧‧‧ center hole

132‧‧‧Positioning column

140‧‧‧LED module

150‧‧‧Power supply unit

152‧‧‧Flexible Department

160‧‧‧LED body

170‧‧‧ bearing

180‧‧‧LED lights

190‧‧‧ circuit layer

192‧‧‧Electrical mat

200‧‧‧Metal fan module

210‧‧‧ cooling fan

220‧‧·wheels

230‧‧‧Rotary pivot

232‧‧‧ latch

240‧‧‧ Groove

250‧‧‧Rotor

260‧‧‧transmit coil circuit

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a top plan view showing a first embodiment of the present invention.

Figure 2 is a cross-sectional view showing a first embodiment of the present invention.

Figure 3 is another cross-sectional view showing the first embodiment of the present invention.

Figure 4 is a top plan view showing a second embodiment of the present invention.

Figure 5 is a cross-sectional view showing a second embodiment of the present invention.

Figure 6 is another cross-sectional view showing a second embodiment of the present invention.

Figure 7 is a further cross-sectional view showing a second embodiment of the present invention.

The detailed description and technical content of the present invention are set forth in the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the present invention provides a high-power LED heat dissipation device including a metal base 110, a metal fan module 200, and an LED module 140. The metal base 110 and the metal fan module 200 described herein may be made of copper, aluminum or an alloy thereof or other metals having good thermal conductivity or alloys thereof, and are not limited thereto.

The metal base 110 has a certain sub-seat 120, a central hole 130 and a positioning post 132. The positioning post 132 extends upright from the central hole 130, and the stator base 120 is disposed at the periphery of the central hole 130. As shown in FIG. 2, the stator base 120 is preferably disposed on the inner wall of the positioning post 132. The metal fan module 200 is placed inside the metal base 110. The metal fan module 200 includes a plurality of cooling fans 210, a wheel 220 connecting the cooling fans 210, and a rotating pivot 230 disposed on the wheel 220 and positioned in the center hole 130. The wheel 220 also has a relative stator seat 120. A rotor 250. In the present embodiment, the pivoting shaft 230 is preferably disposed in the center hole 130 and positioned on the positioning post 132.

The LED module 140 is disposed on the outer side of the wheel 220. The LED module 140 is rotatable relative to the metal fan module 200. The LED module 140 is further connected to a power supply unit 150. In the embodiment shown in FIG. 2, a groove 240 is formed on the outer side surface of the wheel tube 220. The LED module 140 has an LED seat body 160 disposed in the groove 240 and one of the LED block bodies 160. Bearing 170, wherein bearing 170 is capable of following wheel 220 rotation relative to LED mount 160. In other words, the LED holder 160 and the metal base 110 are both positioned, and the metal fan module 200 drives the bearing 170 to rotate relative to the LED holder 160.

The LED holder 160 and the bearing 170 described herein are preferably made of a material having a high thermal conductivity, such as copper, aluminum or an alloy thereof, or other suitable materials, and are not limited.

The LED module 140 further includes an LED lamp 180 and a circuit layer 190 connecting the LED lamps 180. The circuit layer 190 is disposed on the LED holder 160. In addition, the power supply unit 150 is connected to the circuit layer 190 at one end and electrically connected to an external power source (not shown), such as a commercial power supply. The power supply unit 150 described in this embodiment preferably includes, but is not limited to, a conductive sheet, a wire or a flexible circuit board. Since the LED module 140 is fixed to the metal fan module 200, one end of the power supply unit 150 can be directly soldered to the circuit pad 190 or the conductive pad 192 of the circuit layer 190, and the other end can be connected to the metal base 110 frame to connect the wires ( Figure omitted), electrically connected to an external power supply (not shown).

However, in the embodiment shown in FIG. 3, one end of the power supply unit 150 can be connected to the circuit layer 190, and the other end can pass through the LED holder 160, the wheel 220 and the rotating pivot 230 to be connected to an external power source (not shown). Electrically connected to provide power to the LED module 140. The manner in which the LED module 140 is connected to the external power source (not shown) is not limited and may be changed as needed.

When the rotor 250 made of a beryllium copper sheet or other suitable material is in interaction (electromagnetic induction) with the stator base 120 made of an induction coil, the metal fan module 200 rotates and generates a cooling airflow, and a metal fan mold is used. The material of the group 200 itself is easy to conduct heat, and can accelerate the heat dissipation efficiency of the LED module 140. Therefore, the high temperature discharge generated by the high power LED module 140 can be accelerated to improve the luminous efficiency and the lifetime of the LED module 140.

4 and 5 are a top view and a cross-sectional view showing a second embodiment of the present invention. The main difference between this embodiment and the foregoing embodiment is that the LED module 140 can rotate together with the metal fan module 200. In order to smoothly rotate the LED module 140, the surface of the circuit layer 190 is further provided with at least one conductive pad 192 forming an annular shape, so that one end of the power supply unit 150 elastically abuts against at least one conductive pad 192, and the other end passes through the metal base 110. The frame is electrically connected to an external power supply (not shown), as shown in FIG. In this embodiment, the power supply unit 150 is bent at one end with a resilient portion 152 to interfere with the at least one conductive pad 192.

However, as shown in FIG. 6, one end of the power supply unit 150 can be connected to the inner surface of the circuit layer 190, and then stretched along the outer side of the wheel 220 to be electrically connected to an external power source (not shown) to provide power to the LED module 140. . The connection manner between the LED module 140 and the external power supply (not shown) is not limited and may be changed as needed. The power supply unit 150 described above may be a conductive sheet, a wire or a flexible circuit board, which may be changed as needed.

FIG. 7 is a cross-sectional view showing another embodiment of power supply for an LED module according to the present invention. In this embodiment, a transmitting coil circuit 260 disposed in the wheel 220 and corresponding to the power supply unit 150 is further included, and the transmitting coil circuit 260 is configured to emit an electromagnetic signal (not shown) to the power supply unit 140 to provide The LED module 140 is powered. In other words, the power supply unit 150 is disposed between the circuit layer 190 and the wheel 220, and the power supply unit 140 is preferably a wireless charging coil. Therefore, the present invention wirelessly transmits electromagnetic signals to the power supply unit 150 of the wireless charging coil through the transmitting coil circuit 260. The transmitting coil circuit 260 is wirelessly inductively coupled to the wireless charging coil, and the external power/electric power (not shown) is electrically connected to the transmitting coil circuit 260, and then wirelessly transmits the electromagnetic signal to the wireless charging coil end to provide power to the LED module 140.

In this embodiment, the operation of the external power supply terminal and the wireless charging coil/circuit is not limited. It should be noted that the fixed rotation pivot 230 further includes at least one latch 232. The invention integrates the metal fan module 200 (active) and its material (passive) heat dissipation system to improve the heat dissipation efficiency of the LED module 140. In addition, the heat dissipation device effectively discharges the high temperature generated by the LED module 140, and improves the luminous efficiency and the service life of the LED module 140.

In the above, the embodiments disclosed herein are to be considered as illustrative of the invention and not to limit the invention. The scope of the present invention is defined by the scope of the appended claims, and the legal equivalents thereof are not limited to the foregoing description.

100‧‧‧LED heat sink

110‧‧‧Metal base

120‧‧ ‧ Stator seat

130‧‧‧ center hole

132‧‧‧Positioning column

140‧‧‧LED module

150‧‧‧Power supply unit

160‧‧‧LED body

170‧‧‧ bearing

180‧‧‧LED lights

190‧‧‧ circuit layer

192‧‧‧Electrical mat

200‧‧‧Metal fan module

210‧‧‧ cooling fan

220‧‧·wheels

230‧‧‧Rotary pivot

232‧‧‧ latch

240‧‧‧ Groove

250‧‧‧Rotor

Claims (9)

A high-power LED heat dissipating device comprises: a metal base having a certain sub-seat and a central hole, the stator seat is disposed at a periphery of the central hole; a metal fan module is disposed in the metal base, the metal The fan module includes a plurality of cooling fans, a wheel barrel connecting the cooling fans, and a rotating pivot disposed on the wheel barrel and positioned in the center hole, wherein the wheel barrel further has a rotor disposed opposite to the stator seat; An LED module is disposed on an outer side of the wheel, the LED module is rotatable or rotatable relative to the fan module, wherein the LED module is further connected to a power supply unit, and an outer side of the wheel tube is further formed a recess, the LED module has an LED base disposed in the recess and a bearing located in the LED mount, the bearing following the rotation of the spool relative to the LED mount. The high-power LED heat dissipation device of claim 1, wherein the LED module further comprises an LED lamp and a circuit layer connecting the LED lamp, wherein the circuit layer is disposed on the LED holder. The high-power LED heat sink according to claim 2, wherein one end of the power supply unit is connected to the circuit layer, and the other end is electrically connected to an external power source, and the power supply unit is a conductive sheet, a wire or a flexible circuit board. The high-power LED heat sink according to claim 1, wherein the LED module further comprises an LED lamp and a circuit layer connecting the LED lamp, and the circuit layer is further provided with at least one conductive pad. The high-power LED heat sink of claim 4, wherein one end of the power supply unit elastically abuts the at least one conductive pad, and the other end is electrically connected to an external power source through a frame of the metal base. The high-power LED heat sink of claim 5, wherein the power supply unit further has a resilient portion for resisting the at least one conductive pad, the power supply unit being a conductive strip, a wire or a flexible circuit board. The high-power LED heat sink according to claim 4, further comprising a transmitting coil circuit disposed in the drum and corresponding to the power supply unit, the transmitting coil circuit for transmitting an electromagnetic signal to the power supply unit, Provide power to the LED module. The high power LED heat sink according to claim 7, wherein the power supply unit is disposed between the circuit layer and the wheel, and the power supply unit is a wireless charging coil. The high-power LED heat sink of claim 1, further comprising a positioning post for positioning the rotating pivot and at least one latch for fixing the rotating pivot.