Led lamp incorporating fan and heat sink assembly

• US 8,487,517 B2
• Filed: 05/19/2011
• Issued: 07/16/2013
• Est. Priority Date: 03/15/2011
• Status: Expired due to Fees

• Current Assignee: Sunonwealth Electric Machine Industry Company Limited
• Original Assignee: Sunonwealth Electric Machine Industry Company Limited
• Inventors: Fang, I-Le, Chen, Wei-Jen, Li, Ming-Tsung
• Primary Examiner(s): Santiago, Mariceli
• Application Number:
  US13/111,531
• Publication Number:
  US 20120235552A1
• Time in Patent Office: 789 Days
• Field of Search: 313 11- 47, 362/547, 362/218, 362/294, 362/345, 362/373
• US Class Current: 313/35
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• 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 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lamp includes a housing, a heat sink, a cooling fan and a light-emitting module. The housing has an assembling opening and an electrical connection member on two ends thereof, wherein the housing further comprises an inner wall and a portion of the inner wall adjacent to the assembling opening is an air-guiding wall. The heat sink has a base plate disposed at the assembling opening of the housing, wherein the base plate has at least one partitioning board defining an air channel of the heat sink. A first air-guiding opening is formed between the air-guiding wall and the at least one partitioning board, and a second air-guiding opening is formed between the air channel and the air-guiding wall. The cooling fan is coupled with the heat sink and has an impeller. The light-emitting module is coupled with the base plate of the heat sink.

Claims

1. A lamp, comprising:

a housing having an assembling opening and an electrical connection member on two ends thereof, wherein the housing further comprises an inner wall and a portion of the inner wall adjacent to the assembling opening is an air-guiding wall;

a heat sink having a base disposed at the assembling opening of the housing, wherein the base plate has at least one partitioning board defining an air channel of the heat sink, each of the at least one partitioning board has first and second ends abutting against the air-guiding wall of the housing, a first air-guiding opening is formed between the air-guiding wall and the at least one partitioning board, and a second air-guiding opening is formed between the air channel and the air-guiding wall;

a cooling fan coupled with the heat sink and having an impeller; and

a light-emitting module coupled with the base plate of the heat sink.

2. The lamp as claimed in claim 1, wherein the least one partitioning board includes two opposing partitioning boards defining the air channel.

3. The lamp as claimed in claim 1, further comprising a light-permeable hood coupled with the heat sink, wherein the light-permeable hood has an opening portion and the light-emitting module is received in the light-permeable hood through the opening portion.

4. The lamp as claimed in claim 3, wherein the light-permeable hood has an air-guiding shoulder portion on a periphery thereof, and an air-guiding gap is formed between the air-guiding shoulder portion and one end of the housing adjacent to the assembling opening.

5. The lamp as claimed in claim 1, wherein the heat sink further comprises a plurality of fins spaced from each other in the air channel.

6. The lamp as claimed in claim 5, wherein each of the fins comprises two ends abutting against the air-guiding wall of the housing.

7. The lamp as claimed in claim 5, wherein each of the fins comprises two ends and both the two ends are spaced from the air-guiding wall of the housing by a distance.

8. The lamp as claimed in claim 5, wherein the fins form a positioning board on one side thereof and the cooling fan is positioned on the positioning board.

9. The lamp as claimed in claim 1, wherein the housing further comprises a plurality of fixing poles on the inner wall thereof, the heat sink further comprises a plurality of assembling poles on an outer edge thereof that correspond to the plurality of fixing poles, and the heat sink is positioned at the assembling opening of the housing via fixing members extending into the fixing poles through the assembling poles.

10. The lamp as claimed in claim 2, wherein the impeller has a rotation range, the two opposing partitioning boards are spaced from each other by a distance in a radial direction, the impeller is located between the two opposing partitioning boards, and the distance is larger than or equal to the diameter of the rotation range.