TW201508211A - Heat dissipation base of LED lamp - Google Patents

Abstract

A heat dissipation base of a LED lamp includes a plastic housing and a heat conductive filling member. The heat dissipation base is used with a LED lamp which comprises a light emitting source, an initiator, and a heat conduction portion; wherein the initiator is used for driving the light emitting source to emit light, and the heat conduction portion is used for conducting heat energy generated by the light emitting source to other places. An accommodating space is provided inside the plastic housing of the heat dissipation base. The heat conductive filling member is provided in the accommodating space so as to effectively conduct the heat energy radiated by the heat conduction portion or the initiator of the LED lamp, thereby achieving the effect of cooling the LED lamp.

Description

Cooling seat for LED lamps

The invention relates to LEDs; in particular to a heat sink of an LED lamp.

LED (Light Emitting Diode) is a widely used light-emitting element in recent years. In the early days, due to insufficient brightness, it is usually only used in indicators such as indicator lights or display panels. However, with the breakthrough of technology, the luminosity of LEDs is greatly improved. White LEDs are now commonly used as everyday lighting. LED has the advantages of high efficiency, long life, not easy to break, fast response, high reliability, etc. It has the potential to replace traditional incandescent bulbs and fluorescent lamps, and has great potential for future development.

However, the performance of LEDs is easily affected by high temperature and drops sharply. The life expectancy is also shortened due to high temperature. In addition, the LED itself will generate heat. Therefore, in addition to avoiding use in high temperature environments, it is necessary to cooperate with a good heat dissipation design to maintain the most. Good use. Therefore, a general LED lamp is provided with a heat sink, which can quickly achieve thermal balance between the heat generated by the LED and the surrounding environment; the conventional heat sink uses a metal material with high thermal conductivity to accelerate heat conduction, but the metal material can be processed. The shape and the suitable position on the heat sink have their limitations and cannot meet the needs of more heat sink design.

In view of this, an object of the present invention is to provide an LED lamp The heat sink has a good heat dissipation effect, and the shape and applicable position of the component for heat conduction can be more elastically changed according to requirements.

In order to achieve the above object, the present invention provides a heat sink for an LED lamp, wherein the LED lamp includes a light source and a heat conducting portion for conducting heat energy generated by the light source; the heat sink of the LED lamp includes A plastic housing and a heat-conductive filling member, wherein the plastic housing has an accommodating space therein, and the heat-conductive filling member is formed by filling a heat-conducting material into the accommodating space.

Therefore, since the heat conductive filler can be properly disposed in the accommodating space and the heat conduction effect thereof is good, the heat sink of the LED lamp provided by the invention can effectively dissipate heat, and has the possibility of design change with more styles. .

100‧‧‧ Heat sink

10‧‧‧Plastic shell

12‧‧‧ inner tube

14‧‧‧ accommodating space

16‧‧‧ First Joint Department

18‧‧‧Second junction

16a‧‧‧Flange

16b‧‧‧Combination hole

20‧‧‧ Thermal Filler

300‧‧‧ Heat sink

30‧‧‧Plastic shell

32‧‧‧ First Joint Department

34‧‧‧Second junction

36‧‧‧ accommodating space

40‧‧‧ Thermal Filler

500‧‧‧ Heat sink

50‧‧‧Plastic shell

52‧‧‧ first joint

54‧‧‧Second junction

56‧‧‧Inner tube

56a‧‧‧ accommodating space

60‧‧‧ Thermal Filler

700‧‧‧ Heat sink

70‧‧‧Plastic shell

72‧‧‧ accommodating space

74‧‧‧ first joint

76‧‧‧Second junction

80‧‧‧ Thermal Filler

900‧‧‧Lamps

92‧‧‧shade

93‧‧‧Bolts

94‧‧‧Light source

96‧‧‧Transfer Department

96a‧‧‧Drilling

98‧‧‧ lamp holder

1 is a perspective view of a heat sink of an LED lamp according to a first preferred embodiment of the present invention; FIG. 2 is a cross-sectional view of the preferred embodiment of FIG. 1; FIG. 3 is a perspective view of the preferred embodiment of FIG. 1 in actual use; FIG. 5 is a cross-sectional view of a heat sink of an LED lamp according to a third preferred embodiment of the present invention; FIG. 6 is a heat dissipation view of the LED lamp of the fourth preferred embodiment of the present invention; A cross-sectional view of the seat.

The preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 to FIG. 2 show a heat sink 100 for an LED lamp according to a first preferred embodiment of the present invention. The plastic housing 10 includes a first joint portion 16 and a second joint portion 18 respectively located at two ends of the plastic shell 10, but the first and The function of the second joint portions 16 and 18 is described later. The inner portion of the plastic casing 10 is provided with an inner cylinder 12 which is made of plastic in the first preferred embodiment, but the material thereof is The accommodating space 14 is formed between the inner tube 12 and the inner wall surface of the plastic housing 10 , and the heat conductive filler 20 is filled with a heat conductive material in the accommodating space 14 . The heat conductive material described herein is a powder in the preferred embodiment, and may be selected from the group consisting of cerium oxide, graphite, ceramics, metal, or at least one of them, but the heat conductive material is Not limited to the powder, in other embodiments, the heat conduction of the thermally conductive filler 20 is formed. The substance may also be a paste (such as a thermal grease) or a liquid, or even a mixture of the powder, the paste, and the liquid; in short, any having a high thermal conductivity The material that can be filled in the accommodating space 14 can be selected as the heat conductive material.

Referring to FIG. 3, the heat sink 100 of the first preferred embodiment is actually used in combination with an LED lamp 900. The LED lamp 900 includes a lamp cover 92, a light source 94, a heat conducting portion 96, and a lamp cap. And a starter (not shown); wherein the heat conducting portion 96 is configured to conduct heat generated by the light source 94. In the first preferred embodiment, the light source 94 is an LED die disposed on the first The heat conducting portion 96 is formed on the printed circuit board which is formed on the printed circuit board. In other embodiments, the heat conducting portion 96 may be another metal plate additionally bonded to the printed circuit board. The printed circuit board can of course also be selected from different materials as the substrate, but such correlations are conventional techniques and are not the focus of the present invention.

The actuator is placed in a space surrounded by the inner cylinder 12 of the heat sink 100, electrically connected to the light source 94, and can drive the light source 94 to illuminate. The base 98 and the second coupling portion 18 are in a shape matching with each other, so that the heat sink 100 can be coupled to the base 98 through the second joint portion 18, and the lamp holder 98 and an external power source (not shown) are electrically connected. After the connection, the power required for the operation of the LED lamp 900 can be entered by the lamp holder 98. The first joint portion 16 has a flange 16a for receiving the heat conducting portion 96 of the LED lamp, and the heat conducting portion 96 is provided with a plurality of holes 96a. The first joint portion 16 is at a corresponding position. A plurality of coupling holes 16b are provided, so that the heat sink 100 and the heat conducting portion 96 can be fixed to each other by passing the plurality of bolts 93 through the holes 96a and the coupling holes 16b. In addition, the lamp cover 92 can provide a protective and soft light effect, and the lamp cover 92 is also covered and bonded to the first joint portion 16.

The heat conducting portion 96 of the LED illuminator 900 is in contact with the thermally conductive filler 20 in the first preferred embodiment, whereby the thermal energy generated by the illuminating source 94 can be conducted to the thermally conductive filler 20 by the thermally conductive portion 96. The thermally conductive filler member 20 is then transferred to the outer surface of the plastic housing 10 to eventually achieve thermal equilibrium with the surrounding environment. It should be particularly noted that although the heat sink 100 of the first preferred embodiment is shown in FIG. 3 as an example of the combination with the LED lamp 900, in another embodiment, another heat sink and another LED light fixture are used. The use of the combination is similar to this, and will not be described later.

Please refer to FIG. 4 , which is a heat sink 300 of an LED lamp according to a second preferred embodiment of the present invention. The heat sink 300 has a plastic case 30 and a heat conductive filler 40 . The plastic case 30 also has a first joint portion 32 and a The second bonding portion 34 is respectively configured to be coupled to the heat conducting portion 96 of the LED lamp 900 and the lamp cap 98. The difference between the preferred embodiment and the previous preferred embodiment is that the plastic housing 30 is not An inner cylinder is disposed, and the interior of the plastic casing 30 naturally forms an accommodating space 36. The heat conductive filler 40 is a heat conductive material. Formed in the accommodating space 36, the thermal conductive filler 40 covers the LED illuminator in addition to the heat conducting portion 96 of the LED luminaire 900. The actuator of the 900 can simultaneously conduct the thermal energy generated by the illumination source 94 and the actuator to the outer surface of the plastic housing 30. It should be noted that the heat conductive filler 40 does not have to completely fill the accommodating space 36 as long as the heat conductive filler 40 can be in contact with the heat conducting portion 96 and the actuator.

Referring to FIG. 5, a heat sink 500 for an LED lamp according to a third preferred embodiment of the present invention includes a plastic case 50 and a heat conductive filler 60. The two ends of the plastic case 50 respectively have a first joint portion 52 and The inner portion of the plastic housing 50 has an inner tube 56. The inner tube 56 is fitted to the inner wall of the plastic housing 50, and the inner portion of the inner tube 56 defines an accommodating space. 56a, the heat conductive filler 60 is formed by filling a heat conductive material into the accommodating space 56a. As shown in the previous preferred embodiment, the first bonding portion 52 and the second bonding portion 54 are used to be combined with the LED lamp 900, and the thermal conductive filler 60 contacts the LED lamp 90 in a combined use state. The heat conducting portion 96 is embedded in the heat conductive filler 60. Incidentally, in the third preferred embodiment, the inner cylinder 56 is made of metal, but not limited thereto; since the metal has good heat conduction performance, the inner cylinder 56 can additionally accelerate thermal energy conduction.

Referring to FIG. 6 , a heat sink 700 for an LED lamp according to a fourth preferred embodiment of the present invention includes a plastic case 70 and a heat conductive filler member 80. The plastic case 70 is the same as the previous preferred embodiment. The first bonding portion 74 and the second bonding portion 76 are configured to be coupled to the LED lamp 900. The plastic housing 70 is not provided with an inner cylinder or the like, so that an inner space 72 is formed therein. The heat conductive filler 80 is also formed by filling a heat conductive material into the accommodating space 72. However, it is particularly noted that in the fourth preferred embodiment, the heat conductive material is preferably a powder or a paste ( that is, The heat conductive material is not suitable for liquid material, and is directly formed on the inner wall of the plastic casing 70 through a rubber compound or other coating process. In the state in which the heat sink 700 is used in combination with the LED lamp 900, the heat conductive filler 80 is in contact with the heat conducting portion 96 of the LED lamp 900 to facilitate heat conduction. Of course, the thermally conductive filler member 80 can be in contact with the actuator of the LED lamp through a thick coating process. In other embodiments, the thermally conductive filler member 80 can also contact only the heat conducting portion of the LED lamp 900. 96 or one of the starters depends on the cooling requirements.

In summary, the heat conductive filler (20, 40, 60, 80) in each of the preferred embodiments may be filled with a heat conductive material of powder, paste or liquid in each of the accommodating spaces (14, 36, 56a, 72) are formed inside, so it can be applied to a more varied heat sink design. Regardless of the arrangement of the heat sink seat in other embodiments, the heat conductive filler can be properly disposed therein and can be Give good thermal conductivity. In the above preferred embodiments, the heat conductive filler (20, 40, 60, 80) is in contact with the heat conducting portion 96 of the LED lamp 900 or the actuator, but if there are different heat dissipation considerations, the heat conductive filling The material does not necessarily have to be in contact with the heat conducting portion 96, and it is not necessarily necessary to completely cover the actuator. In addition, each of the above preferred embodiments is used in combination with the LED lamp 900 provided with the actuator, but the heat sink of the LED lamp of the present invention can also be applied to an LED lamp without an initiator (such as an AC LED); If the heat sink provided by the present invention is used with the LED lamp without the starter, other components (such as resistors) that dissipate heat during use may be disposed in the accommodating space, and the heat conduction is required according to heat dissipation requirements. The filler material is in contact with the component; and the embodiment in which the thermally conductive filler is in contact with (or not in contact with) the component is similar to the description of the actuator in the foregoing embodiments, and will not be described in detail herein.

The above is only a preferred embodiment of the present invention, and equivalent structural changes are made to the application of the present specification and the scope of the patent application. It should be included in the scope of the patent of the present invention.

100‧‧‧ Heat sink

10‧‧‧Plastic shell

12‧‧‧ inner tube

14‧‧‧ accommodating space

16‧‧‧ First Joint Department

18‧‧‧Second junction

20‧‧‧ Thermal Filler

Claims (13)

A heat sink of an LED lamp, wherein the LED lamp comprises a light source and a heat conducting portion, wherein the heat conducting portion is configured to conduct heat energy generated by the light source; the heat sink of the LED lamp comprises: a plastic shell having an inner portion And a heat-conducting filler member formed by filling a heat-conducting material in the accommodating space. The heat sink of the LED lamp of claim 1, wherein the heat conductive filler is in contact with the heat conducting portion of the LED lamp. The heat sink of the LED lamp of claim 1, wherein the LED light fixture further comprises a starter for driving the light source to illuminate; the heat conductive filler at least partially covering the starter. The heat sink of the LED lamp of claim 1, wherein an inner cylinder is further disposed inside the plastic shell, and the receiving space is formed between the inner cylinder and the inner wall surface of the plastic shell. The heat sink of the LED lamp of claim 4, wherein the inner cylinder is made of plastic. The heat sink of the LED lamp of claim 1, wherein the plastic case is further provided with an inner tube, and the inner tube is attached to the inner wall of the plastic case, and the inner tube encloses the accommodating space. The heat sink of the LED lamp of claim 6, wherein the inner cylinder is made of metal. The heat sink of the LED lamp of claim 1, wherein the heat conductive material forming the heat conductive filler is a powder. The heat sink of the LED lamp of claim 1, wherein the heat conductive material forming the heat conductive filler is a paste. The heat sink of the LED lamp of claim 1, wherein the heat conductive material forming the heat conductive filler is a liquid. The heat sink of the LED lamp of claim 1, wherein the heat conductive material forming the heat conductive filler is a mixture of at least two of a powder, a paste, and a liquid. The heat sink of the LED lamp of claim 8 or 11, wherein the powder is selected from the group consisting of cerium oxide, graphite, ceramics, metal, or at least one of them. The heat sink of the LED lamp of claim 9 or 11, wherein the paste is a thermal grease.