Device for preventing dewing of headlamp

Patent metadata

Field	Value
Publication number	US-10330278-B2
Application number	US-201615562734-A
Country	US
Kind code	B2
Filing date	Apr 12, 2016
Priority date	Apr 13, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

The present embodiment relates to a device for preventing dewing of headlamp, the device comprising: a housing, which has a light source provided therein, and which has a lens installed on a front end thereof; a thermoelectric module formed inside the housing such that, when power is supplied, one side thereof is heated, while another side surface thereof is cooled; a heat sink for radiating heat generated from the thermoelectric module;
a blowing fan formed behind the heat sink; and a blowing duct having a channel formed such that air, which is sent by the blowing fan, ascends along the inner surface of the lens.

First claim

The invention claimed is:

1. A device for preventing dewing of headlamp, the device comprising:
a housing, which has a light source provided therein, and which has a lens installed on a front end thereof;
a thermoelectric module formed inside the housing such that, when power is supplied, one side thereof is heated, while another side surface thereof is cooled;
a heat sink for radiating heat generated from the thermoelectric module;
a blowing fan formed behind the heat sink; and
a blowing duct having a channel formed such that air, which is sent by the blowing fan, ascends along the inner surface of the lens.

2. The device of claim 1 , wherein the heat sink includes a heating part heat sink formed by being in contact with one side surface of the thermoelectric module that is heated and a cooling part heat sink formed by being in contact with one side surface of the thermoelectric module that is cooled.

3. The device of claim 2 , wherein the blowing duct is configured such that an inlet is formed in the shape of wrapping the heating part heat sink to allow the air blown from the heating part heat sink to be introduced thereinside.

4. The device of claim 2 , wherein an outlet of the blowing duct is formed toward a lower portion of the lens.

5. The device of claim 4 , wherein the blowing duct is tapered off in width toward an outlet side from an inlet side.

6. The device of claim 4 , wherein a length of the outlet of the blowing duct is same as a width of the lens.

7. The device of claim 6 , wherein a ratio between the width and the length of the outlet at the blowing duct is 1:90˜1:150.

8. The device of claim 2 , wherein the blowing fan is formed by icing in contact with the heating part heat sink.

9. The device of claim 2 , wherein the cooling part heat sink includes a panel contacting one side surface of the thermoelectric module that is cooled, and a plurality of radiation fins formed at both left and right lateral surfaces of the panel.

10. The device of claim 1 , further comprising a bezel formed between the lens and the blowing duct to divide an inner space of the headlamp.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Ji Hoon
• Kim Dong Kyun

Classifications

• F21S45/43

  using gas · CPC title

• F21V29/54

  using thermoelectric means, e.g. Peltier elements · CPC title

• F21S45/435 Primary

  circulating the gas within a closed system · CPC title

• F21S45/60

  Heating of lighting devices, e.g. for demisting · CPC title

• F21S45/33 Primary

  specially adapted for headlamps · CPC title