SELF-DUSTING LAMP DEVICE

• US 20100237782A1
• Filed: 03/19/2009
• Published: 09/23/2010
• Est. Priority Date: 09/15/2008
• Status: Active Grant

• Current Assignee: Sunonwealth Electric Machine Industry Company Limited
• Original Assignee: Sunonwealth Electric Machine Industry Company Limited
• Inventors: Hu, Heng-Yu, Horng, Alex, Miyahara, Masaharu
• Granted Patent: US 8,115,395 B2
• Time in Patent Office: Days
• US Class Current: 315/117
• 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 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 29/773 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: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01J 61/52 Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space heating or cooling arrangements to promote ionisation for starting H01J61/54

Abstract

A self-dusting lamp device includes a housing, a heat-dissipating module, a lighting element and a controlling unit. The housing has an air inlet portion and an air outlet portion on the outer periphery thereof. The heat-dissipating module has a heat-dissipating fan mounted in the housing. The lighting element is coupled to the heat-dissipating module for illumination. The controlling unit has a driving circuit electrically connected to the heat-dissipating fan and a direction controlling circuit electrically connected to the driving circuit. The direction controlling circuit controls the heat-dissipating fan to rotate in a normal direction for dissipating heat or to rotate in a dusting direction for dusting down the housing through the driving circuit.

Claims

1. A self-dusting lamp device comprising:

a housing having an electrical connection portion on an end of the housing and a light penetrating portion on the other end of the housing, with an air inlet portion and an air outlet portion on the outer periphery of the housing;

a heat-dissipating module being mounted in the housing and having a heat-dissipating fan;

a lighting element being coupled to the heat-dissipating module and being electrically connected to the electrical connection portion; and

a controlling unit having a driving circuit electrically connected to the heat-dissipating fan and a direction controlling circuit electrically connected to the driving circuit for regulating the rotation direction of the heat-dissipating fan via the driving circuit.

2. The self-dusting lamp device as claimed in claim 1, with the heat-dissipating fan being an axial-flow fan.

3. The self-dusting lamp device as claimed in claim 1, with the heat-dissipating module further having a sink coupled to the heat-dissipating fan, and with the sink having a side coupled to the lighting element.

4. The self-dusting lamp device as claimed in claim 1, with the air inlet portion including a plurality of openings spaced in a circumferential direction of the housing.

5. The self-dusting lamp device as claimed in claim 3, with the air inlet portion including a plurality of openings spaced in a circumferential direction of the housing.

6. The self-dusting lamp device as claimed in claim 1, with the air outlet portion including a plurality of openings spaced in a circumferential direction of the housing.

7. The self-dusting lamp device as claimed in claim 3, with the air outlet portion including a plurality of openings spaced in a circumferential direction of the housing.

8. The self-dusting lamp device as claimed in claim 1, with the driving circuit and the direction controlling circuit being packaged into an integrated circuit.