Heat dissipating apparatus for automotive LED lamp

• US 20090059594A1
• Filed: 08/31/2007
• Published: 03/05/2009
• Est. Priority Date: 08/31/2007
• Status: Abandoned Application

• Current Assignee: Ta Yih Industrial Co., Ltd.
• Original Assignee: Ta Yih Industrial Co., Ltd.
• Inventors: Lin, Ming-Feng
• Application Number:
  US11/896,323
• Publication Number:
  US 20090059594A1
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21S 41/143 the main emission direction of the LED being parallel to the optical axis of the illuminating device
• CPC Class Codes: F21S 45/43 using gas
• CPC Class Codes: F21S 45/46 using liquid
• CPC Class Codes: F21S 45/48 with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
• CPC Class Codes: F21V 29/717 using split or remote units thermally interconnected, e.g. by thermally conductive bars or heat pipes
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F28D 15/0266 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers F28D15/043 takes precedence
• CPC Class Codes: F28F 1/32 the means having portions engaging further tubular elements
• CPC Class Codes: F28F 3/02 Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations F28F3/08 takes precedence

Abstract

In a heat dissipating apparatus for an automotive LED lamp, the automotive LED lamp includes an automotive lamp set, a heat dissipating module, a plurality of LEDs, and a reflecting unit. The heat dissipating module is wrapped to form an insulation circuit for separating heat energy and electric power of the insulation circuit and heat dissipating module. The LED is electrically connected to the insulation circuit, and a main base of the LED installs a metal conducting plate for conducting the heat produced by the LED to the heat dissipating module. The reflecting unit is installed in the automotive lamp set, so that the heat dissipating module can use a cold air or a liquid coolant as the heat dissipating medium for dissipating heat, preventing a drop of light output caused by an overheat, and avoiding damages to the LED to extend the life expectancy of the automotive LED lamp.

Claims

1. A heat dissipating apparatus for automotive LED lamp, fixed to an automobile body, and electrically connected to an automotive LED lamp driving circuit in the automobile body, and the automotive LED lamp comprising:

an automotive lamp set having a base and a lamp housing which is a light transmitting body fixed at a front of the base;

a heat dissipating module connected to the base of the automotive lamp set and having a plurality of fins so as to form an insulation circuit in the heat dissipating module, such that the insulation circuit is not electrically connected with a body of the heat dissipating module;

a plurality of LEDs electrically connected to the insulation circuit of the heat dissipating module and each the LED having a main base, the main base having a metal conducting plate so as to conduct heat energy produced by the LEDs to the heat dissipating module; and

a reflecting unit installed inside the base of the automotive lamp set and fixed to the bottom of the reflecting unit so as to reflect a light projected from the LEDs and refracting the light towards the lamp housing.

2. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the heat dissipating module includes one or more grooves, and an insulation circuit is disposed at the bottom surface of the groove for electrically connecting the LED, and the reflecting unit forms one or more grooves, such that the groove of the reflecting unit corresponds to the groove of the heat dissipating module for embedding and fixing the groove of the reflecting unit into the groove of the heat dissipating module.

3. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the heat dissipating module includes a plurality of grooves and an insulation circuit is disposed at the bottom of the groove for electrically connecting the LED, the reflecting unit is electroplated onto an inner lateral surface of the groove.

4. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the automotive lamp base has a through hole for mounting the insulation circuit of the heat dissipating module towards the automotive lamp base and situating the fin of the heat dissipating module at an external side of the automotive lamp base.

5. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the automotive lamp base includes at least one air-guide channel and at least one ventilation hole, and the fin of the heat dissipating module includes a plurality of thermoelectric cooling chips electrically connected to one or more heat dissipating fans, and the heat dissipating fans are mounted at appropriate positions inside the automotive lamp base, and the heat dissipating fan has an air outlet facing towards the fin of the heat dissipating module for heating thermoelectric cooling chip to supply electric energy, and operating the heat dissipating fan.

6. The heat dissipating apparatus for automotive LED lamp as claimed in claim 5, wherein the base of the automotive lamp set has a through hole disposed at an appropriate position, for situating a portion of the fin of the heat dissipating module at an external side of the base, and the thermoelectric cooling chip is fixed onto the fin on an external side of the base.

7. The heat dissipating apparatus for automotive LED lamp as claimed in claim 5, further comprising at least one rectification circuit electrically connected between the thermoelectric cooling chip and the heat dissipating fan.

8. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the heat dissipating module is fixed inside a base of the automotive lamp set, and the plurality of fins of the heat dissipating module separately include one or more through holes, and one or more heat pipes passing the through holes of the fins respectively.

9. The heat dissipating apparatus for automotive LED lamp as claimed in claim 8, wherein the automotive lamp set includes a heat dissipating module installed at an external side of the base of the automotive lamp set, and the heat dissipating module has a plurality of fins, and the fin has a through hole for passing the heat pipe, so that another end of the heat pipe installed at the heat dissipating module inside the base of the automotive lamp set is extended and passed through the through hole of the heat dissipating module at an external side of the base of the automotive lamp set.

10. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the plurality of fins of the heat dissipating module separately have one or more through holes, and the through hole of the fin is provided for passing at least one or more than one thermal conducting pipe, and a cooling module is connected separately to both ends of the thermal conducting pipe.

11. The heat dissipating apparatus for automotive LED lamp as claimed in claim 10, wherein the cooling module includes a storage device for storing a liquid coolant, and a pump installed inside the storage device and connected to an end of the thermal conducting pipe and operated to drive the liquid coolant of the storage device to flow between the thermal conducting pipe and the storage device.

12. The heat dissipating apparatus for automotive LED lamp as claimed in claim 11, wherein the storage device has at least one heat dissipating fan mounted onto an external side of the storage device for dissipating heat for the storage device.

13. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the heat dissipating module has a containing space therein, for containing the liquid coolant, and the heat dissipating module is connected to one or more thermal conducting pipes, and both ends of the thermal conducting pipe have the heat dissipating modules respectively, such that the liquid coolant flows between the thermal conducting pipe and the containing space of the heat dissipating module.

14. The heat dissipating apparatus for automotive LED lamp as claimed in claim 13, wherein the heat dissipating module has an opening disposed at an appropriate position, and a rubber plate installed at the opening for adjusting a pressure change of the liquid coolant in the containing space of the heat dissipating module due to an expansion at hot temperature or a contraction at cold temperature by the elasticity of the rubber plate.

15. The heat dissipating apparatus for automotive LED lamp as claimed in claim 13, wherein the thermal conducting pipe installs a plurality of thermal conducting plates.

16. The heat dissipating apparatus for automotive LED lamp as claimed in claim 2, wherein the heat dissipating module has a containing space therein for containing a liquid coolant, and the heat dissipating module is connected to two or more thermal conducting pipes, and another end of the each thermal conducting pipe is connected to the cooling module, and the cooling module includes a storage device for storing the liquid coolant and a pump installed inside the storage device, and the storage device is connected to one of the thermal conducting pipes, and the pump is connected to another thermal conducting pipe, for pumping the liquid coolant from the storage device to the containing space of the heat dissipating module by the operation of the pump.

17. The heat dissipating apparatus for automotive LED lamp as claimed in claim 16, wherein the storage device includes at least one heat dissipating fan mounted on an external side of the storage device, for dissipating heat for the storage device.

18. The heat dissipating apparatus for automotive LED lamp as claimed in claim 1, wherein the automotive LED lamp is connected to an air filter of the automobile body, and the air filter is connected to an engine of the automobile body, and a base of the automotive LED lamp includes one or more air inlet louvers, the base has a penetrating hole disposed at an appropriate position for connecting the air filter, for forming a vacuum suction when the engine operates, while sucking air filtered by the air filter, such that the heat energy produced by the automotive LED lamp is dissipated to the air filter from the penetrating hole.

19. A heat dissipating apparatus for automotive LED lamp, fixed at an automobile body, and electrically connected to an automotive LED lamp driving circuit in the automobile body, and the automotive LED lamp comprising:

an automotive lamp set including a base and a lamp housing, the lamp housing being a light transmitting body fixed at a front of the base;

a plurality of light emitting modules fixed to a base of the automotive lamp set, the each light emitting module including a light emitting unit, a reflecting unit, a lens unit and a heat dissipating unit, the light emitting unit including an LED and a substrate, the substrate is comprised of a circuit board and a heat dissipating board, the circuit board being electrically connected to the LED, the reflecting unit being provided for installing the light emitting unit at the bottom of the reflecting unit and reflecting light projected by the LED, the lens unit being installed at the front to the reflecting unit, the heat dissipating unit being fixed to the light emitting unit, the heat dissipating unit including a thermoelectric cooling chip and a heat dissipating fin, the thermoelectric cooling chip being coupled to the light emitting unit for lowering temperature of the light emitting unit, the heat dissipating fin being coupled to the thermoelectric cooling chip for lowering the temperature of a body of the thermoelectric cooling chip.

20. The heat dissipating apparatus for automotive LED lamp as claimed in claim 19, wherein the base of the automotive lamp set installs one or more through holes at an appropriate position for situating a heat dissipating fin of the light emitting module at an external side of the base of the automotive lamp set.

21. The heat dissipating apparatus for automotive LED lamp as claimed in claim 19, further comprising a movable shading unit installed between the reflecting unit and the lens unit for driving the automotive LED lamp to project a predetermined light pattern.