LAMP

• US 20110267829A1
• Filed: 04/30/2010
• Published: 11/03/2011
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: Sunonwealth Electric Machine, Ind. Co., Ltd.
• Original Assignee: Sunonwealth Electric Machine, Ind. Co., Ltd.
• Inventors: HORNG, Alex, Li, Ming-Tsung
• Granted Patent: US 8,517,574 B2
• Time in Patent Office: Days
• US Class Current: 362/373
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A lamp comprises a housing, an inner shell, a fan, a heat sink and a lighting module. The housing has a first compartment and a first opening on an end thereof. The inner shell is adapted to be received in the first compartment and has a second compartment and a second opening on an end thereof, wherein the second opening is aligned with the first opening. An air channel is formed between the housing and the inner shell in the first compartment. The inner shell further comprises a through-hole allowing the first compartment to communicate with the second compartment. The fan is located adjacent to the through-hole and has two air-flowing sides for drawing air in and out of the lamp. The heat sink has a bottom plate with one face facing the fan. The lighting module is adapted to be coupled to another face of the bottom plate.

Claims

1. A lamp, comprising:

a housing having a first compartment and a first opening on an end thereof;

an inner shell adapted to be received in the first compartment and having a second compartment and a second opening on an end thereof, wherein the second opening is aligned with the first opening, an air channel is formed between the housing and the inner shell in the first compartment, the inner shell further comprises a through-hole allowing the first compartment to communicate with the second compartment;

a fan located adjacent to the through-hole and having two air-flowing sides for drawing air in and out of the lamp such that the air is allowed to pass through the through-hole;

a heat sink having a bottom plate with one face facing the fan; and

a lighting module adapted to be coupled to another face of the bottom plate.

2. The lamp as claimed in claim 1, further comprising a separation member disposed between the housing and the inner shell so as to form the air channel.

3. The lamp as claimed in claim 1, wherein the second opening has a diameter smaller than that of the first opening, and the second opening is covered in the range of the first opening when the second opening is aligned with the first opening.

4. The lamp as claimed in claim 1, wherein one of the air-flowing sides communicates with the air channel and another one of the air-flowing sides communicates with the second compartment.

5. The lamp as claimed in claim 4, wherein the heat sink is disposed in the second compartment, and the face of the bottom plate facing the fan faces the another one of the air-flowing sides.

6. The lamp as claimed in claim 1, wherein the inner shell further comprises a plurality of vents and an air-guiding cap in form of a plate, the air-guiding cap has an assembly hole, an annual portion and an extension portion, the assembly hole is adapted to receive the fan, the annual portion extends outward and downward in a curved manner from an outer periphery thereof to form the extension portion, and the vents are covered under the air-guiding cap when the air-guiding cap is coupled to the inner shell.

7. The lamp as claimed in claim 1, further comprising a first protrusion extending outward from a periphery of the first opening and a second protrusion extending outward from a periphery of the second opening, wherein a ventilation opening is formed between the first protrusion and the second protrusion.

8. The lamp as claimed in claim 5, wherein the face of the bottom plate facing the another one of the air-flowing sides is mounted with a plurality of fins.

9. The lamp as claimed in claim 1, wherein the lighting module comprises a plurality of lighting elements and a base plate having one face mounted with the lighting elements and another face mounted with the bottom plate.

10. The lamp as claimed in claim 1, further comprising a covering plate disposed on the second opening, wherein the covering plate has a plurality of vents.

11. The lamp as claimed in claim 10, wherein the vents are located along a periphery of the covering plate.

12. The lamp as claimed in claim 1, further comprising a second protrusion extending outward from a periphery of the second opening, wherein the second protrusion has an outer periphery coupled to a circumference of the first opening, and the housing has a plurality of vents which is adjacent to the first opening and located on an outer surface thereof.

13. The lamp as claimed in claim 2, further comprising a first protrusion extending outward from a periphery of the first opening and a second protrusion extending outward from a periphery of the second opening, wherein the first protrusion abuts with the second protrusion such that the first opening is closed by the second protrusion.

14. The lamp as claimed in claim 13, wherein the separation member is in form of a labyrinth protrusion adapted to separate the air channel into a first air channel and a second air channel.

15. The lamp as claimed in claim 14, wherein the through-hole is adapted for the first air channel to communicate with the second compartment, and the inner shell further comprises a plurality of stripped vents allowing the second air channel to communicate with the second compartment.

16. The lamp as claimed in claim 15, wherein the second protrusion has a plurality of first vents and a plurality of second vents, with the first vents communicating with the first air channel and the second vents communicating with the second air channel.

17. The lamp as claimed in claim 16, further comprising a separation plate disposed in the second compartment adapted to separate the second compartment into an upper compartment and a lower compartment, with the through-hole and the stripped vents communicating with the upper compartment.

18. The lamp as claimed in claim 17, wherein the separation plate has an assembly hole, wherein the lighting module is disposed in the assembly hole and faces the lower compartment.

19. The lamp as claimed in claim 18, further comprising a covering plate disposed in the second opening.

20. The lamp as claimed in claim 10, further comprising a separation portion disposed on one face of the covering plate facing the lighting module, the vents are located out of an encompassed range of the separation portion, the separation portion is in contact with the bottom plate of the heat sink, and the lighting module is located inside the encompassed range of the separation portion.

21. The lamp as claimed in claim 20, wherein the separation portion comprises an annual lateral wall.