TWI452228B - LED lighting - Google Patents

Description

LED light fixture

The invention relates to an LED lamp, in particular to an LED lamp with improved service life, which can prevent the output capacitance of the LED lamp internal power circuit module from being heated and reduced by the internal heat convection of the LED lamp to reduce the life of the LED lamp. Service life.

LED lights are the product of the new era. Because of their power saving and high optical power, they have gradually replaced the role of traditional light bulbs or power-saving light bulbs in many aspects and become the protagonist of lighting equipment. Although the LED lamp has the advantages of power saving and high optical power, the LED lamp is not heat-resistant, and the excessive temperature causes the LED lamp to have a light decay phenomenon. Therefore, the LED lamp is equipped with a heat sink, and the heat sink is usually It will be made of metal with high thermal conductivity to quickly transfer the waste heat generated by the LED lamp to the heat sink. Please refer to Figure 7. The existing LED lamp mainly forms an electric cylinder 71 on the top of an electrical connector 70. And a heat dissipation module 72 is disposed on the outer wall surface of the electric tube 71, so that the electrical connection base 70 and the heat dissipation module 72 form a lamp holder, and a power circuit module 73 is disposed in the electric tube 71. The power circuit module 73 is electrically connected to the electrical connector 70, and is covered with an LED lamp board 74 on the heat dissipation module 72. The LED lamp board 74 and the electric tube 71 form a space and pass through. The plurality of wires 75 are electrically connected to the power circuit module 73, and the LED lamp board 74 is provided with a plurality of LED crystals 76; in use, the electrical connector 70 is connected to the commercial power source to illuminate the LED panel 74. a plurality of LED crystals 76, after illuminating the plurality of LED crystals 76 for a period of time, each The LED crystal 76 generates waste heat. At this time, heat energy is transmitted to the heat dissipation module 72 through the LED lamp board 74 to be dissipated after heat exchange with the air, and the LED lamp board 74 and the electric cylinder 71 form a space. Therefore, since the power circuit module 73 in the electric cylinder 71 also generates thermal energy, the interval can prevent the heat energy generated by the power circuit module 73 from being transmitted to the LED lamp board 74.

However, the above LED lamp can dissipate the waste heat generated by the LED crystal 76 on the LED lamp board 74 through the heat dissipation module 72, and does not cause overheating to generate light decay, but the LED lamp is mostly used as the LED crystal of the LED lamp board 74. 76 is irradiated downwards. Therefore, the power circuit module 73 is relatively located above the LED panel 74 during use. Based on the principle of air convection, part of the waste heat generated by the LED crystal 76 on the LED panel 74 is convected by air. The method is concentrated in the electric cylinder 71, and the other part is transmitted to the heat dissipation module 72, so that the heat energy generated by the entire LED lamp is concentrated around the power circuit module 73, so that the heat generated by the power circuit module 73 is not easily dispersed. The electronic component on the power circuit module 73 is overheated and damaged in the long-term environment. Generally, an output capacitor 731 must be disposed on the power circuit module 73, and the output capacitor 731 is only required to have a surrounding temperature. When the temperature exceeds 90 ° C, the life is greatly reduced, and the output capacitor 731 of the power circuit module 73 must be disposed at the closest position to the LED panel 74 based on circuit design considerations. Recently, the temperature has risen rapidly. Therefore, the output capacitance of the existing LED lamp is often less durable than the LED crystal 76, and the LED lamp is damaged due to the damage of the power circuit module 73, and the power circuit module 73 is usually It is directly soldered to the electrical connector 70 and cannot be replaced. Once the entire LED lamp is damaged, it is scrapped. Therefore, the existing LED lamp is rather unsatisfactory and needs to be improved.

In view of the technical defects that the power circuit module of the existing LED lamp is easily damaged, the main object of the present invention is to provide an LED lamp, which can prevent the waste heat generated by the LED lamp from being concentrated on the output capacitor of the power circuit module. Preventing overheating of the output causes damage to the entire LED luminaire.

The main technical means for achieving the above purpose is that the LED lamp comprises: an electrical connecting seat, an electric cylinder is disposed thereon, and the electric cylinder has a tubular opening, and the electrical cylinder is provided with the electrical property a power supply circuit module electrically connected to the socket, wherein the power circuit module is provided with an output capacitor; a heat dissipation module is sleeved on the outer wall surface of the electric cylinder of the electrical connection seat, and higher than the electric cylinder mouth; An LED light board is disposed on the heat dissipation module, and is spaced apart from the electric cylinder and electrically connected to the power circuit module. Further, the LED light board is provided with a plurality of LED crystals; The heat sleeve is disposed in the heat dissipation module and located between the output capacitor of the power circuit module and the LED light board, and the material of the heat insulation sleeve is heat insulating material.

In the above invention, the LED lamp board is insulated from the output capacitor of the electric cylinder by a heat insulating sleeve to form hot air convection, so that the waste heat generated by the plurality of LED crystals is not concentrated by the air convection around the output capacitor, and the power circuit module is prevented. The output capacitor on the upper side is overheated to reduce the life and improve the service life of the LED lamp.

Referring to FIG. 1 to FIG. 3, the LED lamp of the present invention comprises: an electrical connector 10, an electric cylinder 11 is disposed thereon, and the electric cylinder 11 has a tubular opening 12, and the electrical cylinder 11 is provided with a The power circuit module 13 is electrically connected to the power circuit module 13. The power circuit module 13 is provided with an output capacitor 131. In the embodiment, the power circuit module 13 is provided with a plurality of wires 14 and the electric tube 11 is formed with an external thread 15 near the mouth 12; a heat dissipation module 20 is sleeved on the outer wall surface of the electric cylinder 11 of the electrical connector 10 and higher than the barrel 12 of the electric cylinder 11, in this embodiment, The heat dissipation module 20 has an outer circumferential surface and an inner circumferential surface, and a plurality of fins 21 are formed on the outer circumferential surface thereof, and an inner convex ring 22 is formed on the inner circumferential surface, and the inner convex ring 22 has a top annular surface 221. And a plurality of screw holes 222 are formed on the top ring surface 221; an LED light board 30 is disposed on the heat dissipation module 20, and is spaced apart from the electric tube 10, and passes through the plurality of wires 14 and the The power circuit module 13 is electrically connected, and the LED light board 30 is provided with a plurality of LED crystals 31. The LED light board 30 is abutted against the top ring surface 221 of the inner convex ring 22 of the heat dissipation module 20, and the peripheral edges thereof respectively extend inwardly to form the plurality of screw holes 222 of the top ring surface 221 to form a plurality of concave holes 32, and The plurality of bolts 33 are respectively passed through the plurality of recessed holes 32 and screwed into the corresponding screw holes 322 to fix the LED light board 30 to the inner convex ring 22 of the heat dissipation module 20; The heat dissipation module 20 is disposed in the heat dissipation module 20 and located between the electric cylinder 10 and the LED light panel 30, and the heat insulation sleeve is made of heat insulation material. In this embodiment, the heat insulating sleeve 40 is sleeved in the barrel 12 of the electric cylinder 11 in the heat dissipation module 20, so that the tube 12 of the electric tube 11 is closed, and the heat insulating sleeve 40 is formed with a perforation at the top. 41. The electric wire 14 on the power circuit module 13 is connected to the LED lamp board, and the heat insulating sleeve 40 is circular, and the external thread 15 of the electric cylinder 11 is formed with an internal thread 42 to The electric tube 11 is screwed and fixed, and the heat insulating sleeve 40 has a top surface, which may be a flat surface, or may be a conical surface and a circular arc surface as shown in FIG. 4 and FIG. 5, respectively. The material of the heat insulating sleeve 40 can be preferably selected from a material having a thermal conductivity lower than 10, and has a better heat insulating effect. The heat insulating sleeve 40 can be made of polypropylene (PP) or epoxy resin (EPOXY).

Referring to FIG. 6 , the heat dissipation module 20 of the LED lamp can form a convex ring 23 at the outer edge of the corresponding LED lamp plate 30, and is tightly disposed with a lamp cover 24 having an outer diameter matching the inner diameter of the convex ring 23 . In the convex ring 23, the LED lamp panel 30 is placed in the globe 24.

When the LED lamp of the present invention is electrically connected to the mains, the LED lamp board 30 is turned down, and the plurality of LED crystals 31 on the LED lamp board 30 are illuminated as illumination. After a period of time, the plurality of LED crystals 31 are Heat is generated, that is, hot air convection is formed at the interval between the LED light panel 30 and the heat insulating sleeve 40. At this time, the convection of the hot air is blocked by the heat insulating sleeve 40 and does not enter the electric cylinder 11, that is, It can prevent the hot air from concentrating to the periphery of the output capacitor 131, improve the life of the output capacitor, and improve the service life of the LED lamp. Since the gas is transmitted to the object through the conduction mode, the speed is slow, and the heat insulating sleeve 40 is preferably used. The material is made of a material with a thermal conductivity lower than 10, which can further prevent the hot air from transmitting heat to the heat insulating sleeve 40, thereby effectively preventing the hot air from affecting the power supply in the electric cylinder 11. The circuit module 13 and the output capacitor 131; in addition, if the top surface of the heat insulating sleeve 40 is preferably conical or circular arc shape, when the LED light panel 30 rises in hot air, it is conical or round. The middle portion of the top surface of the arc-shaped heat insulating sleeve 40, the hot air will spread from the center to the inner peripheral surface of the heat-dissipating module 30 along the top surface of the heat-insulating sleeve, so that the hot air passes through the heat-dissipating module with good heat conduction effect. 30 heat dissipation; further improve the heat dissipation effect of the entire LED lamp.

In summary, the present invention is provided with the heat insulating sleeve, so that the output capacitor on the power circuit module is not affected by the convection of hot air, and the service life is greatly improved. Therefore, the present invention can prevent the output capacitor from being overheated and damaged. The speed at which the power circuit module dissipates heat.

10‧‧‧Electrical connector

11‧‧‧Electric tube

12‧‧‧ mouth

13‧‧‧Power circuit module

131‧‧‧Output capacitor

14‧‧‧Wire

15‧‧‧ external thread

20‧‧‧ Thermal Module

21‧‧‧ Heat sink

22‧‧‧Inner ring

221‧‧‧Top torus

222‧‧‧ screw holes

23‧‧‧ convex ring

24‧‧‧shade

30‧‧‧LED light board

31‧‧‧LED crystal

32‧‧‧ recessed hole

33‧‧‧Bolts

40‧‧‧Insulation sleeve

41‧‧‧Perforation

42‧‧‧ internal thread

70‧‧‧Electrical connector

71‧‧‧Electric tube

72‧‧‧ Thermal Module

73‧‧‧Power circuit module

731‧‧‧Output capacitor

74‧‧‧LED light board

75‧‧‧Wire

76‧‧‧LED crystal

Figure 1 is a perspective view of a combination of a preferred embodiment of the present invention.

Figure 2 is an exploded perspective view of Figure 1.

Figure 3: is a partial cross-sectional view of Figure 2.

Figure 4 is a cross-sectional view showing another preferred embodiment of the present invention.

Figure 5 is a cross-sectional view showing still another preferred embodiment of the present invention.

Figure 6 is an exploded view of the lamp cover of the present invention.

Figure 7: A partial cross-sectional view of an existing LED luminaire.

10‧‧‧Electrical connector

20‧‧‧ Thermal Module

21‧‧‧ Heat sink

30‧‧‧LED light board

31‧‧‧LED crystal

33‧‧‧Bolts

Claims (9)

An LED lamp includes: an electrical connecting seat, an electric cylinder is disposed thereon, and the electric cylinder has a tubular opening, and the electric cylinder is provided with a power circuit module electrically connected to the electrical connecting seat, The power circuit module is provided with an output capacitor; a heat dissipation module is sleeved on the outer wall surface of the electric tube of the electrical connection seat and higher than the electric tube mouth; an LED light board is provided on the a heat dissipation module is formed with a gap between the electrical cylinder and the power supply circuit module; and the LED light panel is provided with a plurality of LED crystals; and a heat insulating sleeve is disposed on the heat dissipation module In the group, and located between the output capacitor of the power circuit module and the LED light board, and the material of the heat insulation sleeve is heat-insulating material; the electric tube is formed with an external thread near the barrel mouth, and the heat insulation sleeve is circular And the external thread corresponding to the electric cylinder is formed with an internal thread to be screwed and fixed with the electric cylinder. The LED lamp of claim 1, wherein the power circuit module is provided with a plurality of wires, and the heat insulation sleeve is sleeved on the barrel of the electric tube in the heat dissipation module, so that the electric tube mouth is closed. And forming a through hole at the top for the wire on the power circuit module to be connected to the LED light board. The LED lamp of claim 2, wherein the heat insulating cover has a top surface, and the top surface is a flat surface. The LED lamp of claim 2, wherein the heat insulating cover has a top surface, and the top surface is a conical surface. The LED lamp of claim 2, wherein the heat insulating sleeve has a top surface, and the top surface is a circular arc surface. The LED lamp of any one of claims 1 to 5, wherein the material of the heat insulating cover has a thermal conductivity of less than 10. The LED lamp of claim 6, wherein the insulating sleeve is made of polypropylene or epoxy. The LED lamp of claim 7, wherein the heat dissipation module further forms a convex ring at an outer edge of the corresponding LED light plate, and is disposed in a tight fit with a light cover having an outer diameter matching the inner diameter of the convex ring. In the convex ring, the LED light panel is covered in the lamp cover. The LED lamp of claim 8, wherein the heat dissipation module has an outer circumferential surface and an inner circumferential surface, a plurality of heat dissipation fins are formed on the outer circumferential surface, and an inner convex ring is formed on the inner circumferential surface. The convex ring has a top ring surface, and a plurality of screw holes are formed on the top ring surface, and the LED light board is abutted against the top ring surface of the inner convex ring of the heat dissipation module, and the peripheral edges thereof respectively correspond to the top ring surface The plurality of screw holes extend inwardly to form a plurality of recessed holes, and the plurality of bolts respectively pass through the plurality of recessed holes and are screwed with the corresponding screw holes to fix the LED light board to the inner convex ring of the heat dissipation module.