AU2009100351A4

AU2009100351A4 - LED illumination device

Info

Publication number: AU2009100351A4
Application number: AU2009100351A
Authority: AU
Inventors: Huan Chiu Chou
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-23
Filing date: 2009-04-17
Publication date: 2009-05-21
Anticipated expiration: 2017-04-17
Also published as: CN201382280Y

Description

1 LED illumination device BACKGROUND The present invention belongs to the technical field of LED illumination device. 5 LED is a semi-conductor which could convert electric power to visible light. It changes the lighting principles of incandescent filament lamps and the tricolor powders of fluorescent energy saving lamps. Instead, electric fields are utilized for light emission. LED has numerous advantages including high durability, high efficiency of light, no radiation and low power consumption. With the ideas of 10 "energy saving" and "green lighting", LEDs are gradually utilized as light source in lighting device. Currently, light bulbs and table lamps used in domestic lighting device mainly use incandescent light bulbs or fluorescent tubes as light source. However, incandescent light bulbs and fluorescent tubes both have low power-light 15 conversion efficiency, and they generate high amount of heat and have a low lifespan of only 3,000 hours in general. In view of the significant advantages of LED, LED lighting device using LED as light source are available in the marketplace. To enhance lighting effect, a plurality of high luminosity LEDs are used as light source. Although this could increase luminosity, the amount of heat 20 generated also increases. The amount of heat generated may result in lower lifespan and even damages of the LED illumination device. To obtain stable light output and maintain normal component lifespan for LED illumination device utilizing LED as light source, the key is to achieve good heat dissipation.

SUMMARY

2 An object of the present invention is to provide an LED illumination device which has good heat dissipation effect, simple structure and is energy saving. To attain this, the technical proposal of the present invention is as follows: An LED illumination device comprises an upper shell body and a lower shell 5 body. The upper shell body has a first side which is connected with the lower shell body to form a shell cavity. A driving circuit module is installed inside the shell cavity. The upper shell body has a second side which is connected with an upper cover which is installed with light sources lens units. The second side of the upper shell body connects with the upper cover to form a cavity wherein LED light source 10 units are installed. A bottom end of the lower shell body is connected with a power terminal. The upper shell body has a rim which is evenly disposed with a plurality of first apertures. Heat dissipation apertures are disposed on gaps between the light source lens units installed on the upper cover. The lower shell body has a rim which is also evenly disposed with a plurality of second apertures. The driving 15 circuit module comprises a fan module and an electric circuit board equipped with light source driving circuit. As an improvement on the aforesaid technical proposal, the heat dissipation apertures disposed on the upper cover are connected with heat-dissipating tubes. The electric circuit board is disposed with apertures for ventilation and heat 20 dissipation. The upper shell body and the upper cover are integrally formed as a whole. Alternatively, the upper cover is designed as an independent part and the upper cover is connected with the upper shell body via fixing rods. The light source lens 3 unit may take the forms of concave lens or convex lens. The fan module is a low speed fan. In comparison with the prior art, the present invention has the following significant effects: 5 Both the upper and lower shell bodies are disposed with apertures, which, in combination with the fan module disposed in the LED illumination device, speed up convection and dissipation of heat generated internally during operation of the LED illumination device, thereby aiding heat dissipation of the LED illumination device. The present invention has simple structure, attains good heat dissipation 10 effect and could significantly prolong the lifespan of the LED illumination device. DETAILED DESCRIPTION OF THE INVENTION Fig. 1 is a schematic view of the exterior structure of the LED illumination device of the present invention. Fig. 2 is a front view of upper cover of the LED illumination device of the 15 present invention. Fig. 3 is a perspective view of the upper cover in Fig. 2. Fig. 4 is a schematic view of the second side of the upper shell body of the LED illumination device of the present invention. Fig. 5 is a perspective schematic view of the upper shell body of the LED 20 illumination device of the present invention (with the LED light source removed). Fig. 6 is a perspective schematic view of the first side of the upper shell body of the LED illumination device of the present invention. Fig. 7 is a perspective schematic view of the lower shell body of the LED illumination device of the present invention.

4 The present invention is an LED illumination device which comprises an upper shell body and a lower shell body. Both the upper and lower shell bodies are disposed with apertures, which, in combination with a fan module disposed in the LED illumination device, speed up convection and dissipation of heat generated 5 during operation of the LED illumination device, thereby aiding heat dissipation of the LED illumination device and prolonging the lifespan of the LED illumination device. The present invention is described in detail with the following embodiment and the accompanying drawings. 10 Referring to Fig. 1, the present invention is an LED illumination device which comprises an upper shell body 102 and a lower shell body 202. The upper shell body has a first side which is connected with the lower shell body to form a shell cavity. A driving circuit module is installed inside the shell cavity. The upper shell body has a second side which is connected with an upper cover 1024 which 15 is installed with light sources lens units 10242. The second side of the upper shell body connects with the upper cover to form a cavity wherein the LED light source units 1026 are installed. A bottom end of the lower shell body is connected with a power terminal 300. The upper shell body 102 has a rim which is disposed with a plurality of first 20 apertures 1022 for dissipating heat inside the LED illumination device. More preferably, the plurality of first apertures 1022 each has a width greater than 15mm and a height greater than 200mm for better dissipation of heat inside the LED illumination device. The lower shell body 202 has a rim which is disposed with a plurality of second apertures 2022 and connected with the upper shell body 5 102 to form the shell cavity (not shown in the drawings). Similarly, heat generated inside the LED illumination device could dissipate through the second apertures 2022. The power terminal 300 is electrically connected with an external power source (not shown in the drawings). The external power source supplies power to 5 the LED illumination device. Fig. 2 is a front view of the upper cover of 1024 which is connected with the upper shell body 102. The upper cover 1024 is installed with light source lens units 10242. Heat dissipation apertures 10244 are disposed on gaps between the light source lens units. Some of the heat dissipation apertures are connected with heat 10 dissipating tubes 10246. The upper cover 1024 and the upper shell body 102 could be formed integrally as a whole or by combination of independently formed parts. The upper cover 1024 could be made of materials that are transparent, partially transparent or opaque. Light source lens units 10242 are disposed corresponding to the LED 15 light source units. The light source lens units may take the forms of convex lens or concave lens, so that light emitted therefrom forms either converging or diverging light source. The heat dissipation apertures 10244 could be in various forms with no fixed shape or size. For example in the present embodiment, the heat dissipation apertures 10244 are disposed near the circumference of the upper 20 cover 1024 between the light source lens units 10242. More preferably, the heat dissipation apertures 10244 could be combined with the heat-dissipating tubes 10246 to form a more centralized heat dissipation channel. In the embodiment as shown in the drawings, the upper cover and the upper shell body are not integrally formed as a whole and so fixing rods 10248 are needed to fix the upper cover 6 1024 on the upper shell body 102. The fixing rods are disposed on the upper cover to connect the upper cover with the upper shell body. However, the fixing rods 10248 are not essential features, for example, if the upper shell body 102 and the upper cover 1024 are integrally formed as a whole, the fixing rods 10248 are no 5 longer required. Moreover, referring to Fig. 3 which shows a perspective view of the upper cover 1024, the fixing rod 10248 at the centre of the upper cover 1024 not only fix the upper cover 1024 on the upper shell body 102, but also fix the fan module 10210 installed in the shell cavity. Figs. 4 and 5 are schematic views of the upper shell body 102 of the LED 10 illumination device of the present embodiment. In the present embodiment, the second side of the upper shell body 102 is disposed with a plurality of LED light source units 1026 which correspond with the plurality of light source lens units 10242 disposed on the upper cover. The light source units 1026 form converging or diverging light sources via the light source lens units 10242. It should be 15 particularly noted that the plurality of heat-dissipating tubes 10246 as shown in Figs. 2 and 3 in combination with the heat dissipation apertures 1028 disposed on the second side of the upper shell body 102 and/or the fan module 1020 disposed on the first side of the upper shell body 102 form convection of air between the interior and exterior of the LED illumination device. 20 Fig. 6 shows the fan module 10210 in the shell cavity of the LED illumination device. More preferably, a low speed fan should be selected as the fan module 10210, so that operation of the LED illumination device not only enjoys the advantage of low noise, but also saves energy.

7 Fig. 7 shows the lower shell body 202 of the LED illumination device. In the present embodiment, the lower shell body 202 has a rim which is disposed with a plurality of second apertures 2022, and the lower shell body 202 connects with the upper shell body 102 to form the shell cavity. For better connection between the 5 upper and lower shell bodies, the lower shell body is disposed with position rods 20248 on its upper circumferential wall. When the lower shell body 202 and the upper shell body 102 are connected with each other, a heat dissipation channel is formed by the fan module 10210 disposed in the shell cavity, the heat-dissipating tubes 10246, the first apertures 1022, the heat dissipating apertures 1028 and the 10 second apertures 2022, thereby resulting in convection of air between the interior and exterior of the LED illumination device. A driving circuit module is installed in the shell cavity formed by the upper and lower shell bodies of the present LED illumination device. The driving circuit module comprises the fan module 10210 and an electric circuit board 2024 15 equipped with light source driving circuit. For better heat dissipation, the electric circuit board is disposed with apertures 2026 for ventilation and heat dissipation. The size and the number of the apertures are determined by actual design of the electric circuit board. The apertures on the electric circuit board could facilitate air in the shell cavity to flow through apertures 2026 and then the second apertures 20 2022 and form air convection with air outside the cavity, thereby aiding heat dissipation. The foregoing embodiment is considered a preferred embodiment of the present invention. The present invention is capable of other embodiments.

8 Therefore, all obvious modifications that do not deviate from the concept of the present invention may be resorted to falling within the scope of the invention.

Claims

1. An LED illumination device which comprises an upper shell body (102) and a lower shell body (202); the upper shell body has a first side which is connected 5 with the lower shell body to form a shell cavity; a driving circuit module is installed inside the shell cavity; the upper shell body has a second side which is connected with an upper cover (1024) which is installed with light sources lens units (10242); the upper shell body connects with the upper cover to form a cavity wherein LED light source units (1026) are installed; a bottom end of the lower shell body is 10 connected with a power terminal (300), characterized in that: the upper shell body has a rim which is evenly disposed with a plurality of first apertures (1022); heat dissipation apertures (10244) are disposed on gaps between the light source lens units installed on the upper cover (1024); the lower shell body has a rim which is also evenly disposed with a plurality of 15 second apertures (2022); and the driving circuit module comprises a fan module (10210) and an electric circuit board (2024) equipped with light source driving circuit.

2. An LED illumination device according to Claim 1, characterized in that the heat dissipation apertures (10244) disposed on the upper cover (1024) are connected 20 with heat-dissipating tubes (10246), and the electric circuit board is disposed with apertures (2026) for ventilation and heat dissipation.

3. An LED illumination device according to Claim 2, characterized in that the upper shell body and the upper cover are integrally formed as a whole, or the upper 2 cover is designed as an independent part and the upper cover is connected with the upper shell body via fixing rods (10248).

4. An LED illumination device according to Claim 3, characterized in that the light source lens unit may take the forms of concave lens or convex lens, and the fan 5 module is a low speed fan.

5. An LED illumination device according to any of Claims 1-4, characterized in that the first apertures each has a width of more than 15mm and a height of more than 200mm.