Light device for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11098873-B2
Application number	US-202017021491-A
Country	US
Kind code	B2
Filing date	Sep 15, 2020
Priority date	Sep 16, 2019
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

The light device comprises a housing (1) covered with a transparent or semi-transparent cover (2) that delimit an inner chamber (3) inside the housing (1), a light unit (5) situated in the chamber (3) and equipped with at least one light source, a cooler (4) associated with the light unit (5), and a tubular cooling conduit (7) that passes through an opening (10) in the housing (1) into the chamber (3) to supply cooling medium (8) from the cooling medium (8) source installed outside the housing (1) to the cooler (4) and comprises a drive means (74) for forced flow of the cooling medium (8) in the tubular cooling conduit (7). The tubular cooling conduit (7) is connected to the cooler (4) in such a way that the cooling medium (8) does not escape from the tubular cooling conduit (7) and cooler (4) to the surrounding space in the chamber (3). Inside the tubular cooling conduit (7), one or more adjacent supply channels (72) are provided to supply the cooling medium (8) to the cooler (4) in one direction, and next to the supply channel (72) or channels (72), one or more exhaust channels (73) are provided to simultaneously discharge the cooling medium from the cooler (4) in the opposite direction out of the housing (1).

First claim

The invention claimed is:

1. A headlight or signal light assembly for a motor vehicle, comprising:
a housing in the form of a receptacle defined by a housing wall, the housing wall having an inner surface facing an interior of the housing and an outer surface opposite the inner surface;
a transparent or semi-transparent lens closing the housing and being designed to protect and separate the interior of the housing from external surrounding of the motor vehicle;
a light unit situated in the housing and including at least one light source and a cooler associated with the light source; and
a tubular cooling conduit extending between a cooling medium source positioned outside the housing and the cooler positioned in the housing,
wherein the tubular cooling conduit passes through an opening formed in the housing into the housing to supply cooling medium from the cooling medium source to the cooler and comprises a drive means for forced flow of the cooling medium in the tubular cooling conduit,
wherein the tubular cooling conduit is connected to the cooler in such a way that the cooling medium does not escape from the tubular cooling conduit and cooler to the surrounding space in the housing,
wherein inside the tubular cooling conduit, one or more adjacent supply channels are provided to supply the cooling medium to the cooler in one direction, and next to the supply channel or channels, one or more exhaust channels are provided to simultaneously discharge the cooling medium from the cooler in the opposite direction out of the housing.

2. The headlight or signal light assembly according to claim 1 , wherein the tubular cooling conduit is connected to the cooler with one of its longitudinal ends, and outside the housing, it is connected to the cooling medium source.

3. The headlight or signal light assembly according to claim 1 , wherein the tubular cooling conduit is straight.

4. The headlight or signal light assembly according to claim 1 , wherein the tubular cooling conduit is bent or angled.

5. The headlight or signal light assembly according to claim 1 , wherein the tubular cooling conduit comprises at least one flexible length section, wherein at least one of the flexible length sections is found in the housing in order to enable an adjusting position of the light unit relative to the housing wall.

6. The headlight or signal light assembly according to claim 1 , wherein the supply and exhaust channels are all parallel.

7. The headlight or signal light assembly according to claim 1 , wherein the drive means is attached to the outer surface of the housing wall in order for the drive means to be accessible from outside the housing for maintenance, repair, or removal of the drive means.

8. The headlight or signal light assembly according to claim 1 , wherein the tubular cooling conduit comprises an outer tube and an inner tube arranged inside the outer tube, which are configured to supply the cooling medium to the cooler through the inner tube constituting the supply channel, and to discharge the cooling medium from the cooler through the space between the jackets of the outer tube and inner tube constituting the exhaust channel, or to discharge the cooling medium through the inner tube constituting the exhaust channel and to supply the cooling medium through the space between the jackets of the outer tube and the inner tube forming the supply channel.

9. The headlight or signal light assembly according to claim 8 , wherein the said drive means is a fan the rotor of which is fitted with a set of outer blades situated against the said space delimited between the jackets of the outer tube and inner tube, and a set of inner blades situated against the inner tube, one of the said two sets being a set of pushing blades and the other one of the said sets being a set of pulling blades.

10. The headlight or signal light assembly according to claim 1 , wherein the cooler is implemented as a heat exchanger.

11. The headlight or signal light assembly according to claim 1 , wherein the cooler has peripheral walls that delimit the inner space of the cooler wherein at least from one peripheral walls, inner walls protrude into the said space in such a way that between individual inner walls and between the inner walls and peripheral walls, inner channels are provided for streaming of the cooling medium in the cooler.

12. The headlight or signal light assembly according to claim 11 , wherein from at least one peripheral wall or inner wall, cooling fins protrude into the said space in such a way that the cooling medium flows around the cooling fins.

13. The headlight or signal light assembly according to claim 1 , wherein the cooler and/or lighting unit are position adjustable with respect to the housing by means of assembly nodes connecting the cooler and/or lighting unit with the housing wall.

14. The headlight or signal light assembly according to claim 1 , wherein the cooling medium is air and the drive means is a fan.

15. The headlight or signal light assembly according to claim 1 , wherein the light source is a LED source.

Assignees

• Varroc Lighting Systems Sro

Inventors

• Vlcek Dalibor
• Kratochvil Jan
• Hasa Ondrej
• Grof Jan

Classifications

• B60Q1/00 Primary

  Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor (for lighting vehicle interior B60Q3/00) · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21S45/43 Primary

  using gas · CPC title

• B60Q3/00

  Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors · CPC title

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title