EP3375913A1 - Dissipateur thermique et méthode pour sa fabrication - Google Patents
Dissipateur thermique et méthode pour sa fabrication Download PDFInfo
- Publication number
- EP3375913A1 EP3375913A1 EP17425032.4A EP17425032A EP3375913A1 EP 3375913 A1 EP3375913 A1 EP 3375913A1 EP 17425032 A EP17425032 A EP 17425032A EP 3375913 A1 EP3375913 A1 EP 3375913A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat sink
- light
- vehicle
- housing compartment
- compartment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 7
- 239000004411 aluminium Substances 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 6
- 239000002344 surface layer Substances 0.000 claims abstract description 5
- 238000004512 die casting Methods 0.000 claims abstract description 4
- 230000009993 protective function Effects 0.000 claims description 2
- 238000007743 anodising Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
Definitions
- the present invention relates to a heat sink for a light of a vehicle and a method for making it.
- the heat sink enables the heat transmitted (mainly by radiation and conduction) by the lamp of the light, when it is on, to be dissipated by convection. In the absence of this component the high temperatures could cause premature breakage of the lamp and therefore the need for more frequent replacements. This particularly occurs in countries with a mild or hot climate where the environmental temperature alone cannot compensate for the overheating.
- the heat sink is arranged under the bonnet, behind the light.
- the heat sink comprises a fin pack to facilitate heat exchange with the surrounding air.
- the technical task that is the basis of the present invention is to propose a heat sink and a method for making it that overcome the above-mentioned drawbacks of the prior art.
- the subject matter of the present invention is a heat sink 1 for disposing of the heat generated by the operation of a light 10 of a vehicle.
- this is a vehicle for road use, preferably a motor vehicle.
- the heat sink 1 comprises a die-cast body 11.
- a metal alloy preferably an aluminium alloy.
- it comprises an aluminium and magnesium alloy.
- the body 11 is anodised. Therefore, it comprises a surface layer of oxide which performs a protective function against corrosive phenomena. In particular, this allows resistance to be offered against the corrosion due to atmospheric agents and more generally to the air with which it comes into contact for being able to exercise its heat dissipation function.
- the body 11 is monolithic. Appropriately it is finned (see for example the fins 2 highlighted in figure 4 ).
- the subject matter of the present invention is also a light 10 of a vehicle comprising:
- the housing compartment 4 is fluid-dynamically sealed. Possibly, at least a part of the body 11 of the heat sink 1 may contribute to the fluid-dynamic seal of the housing compartment 4.
- the body 11 may comprise a positioning seat 7 for the light source 3 (or more precisely for the circuit board thereof, in the case of an LED).
- a vehicle comprising at least one light 10 having one or more of the characteristics described hereinabove.
- the vehicle is a road vehicle, preferably a motor vehicle.
- the light 10 is a headlight, used to illuminate the space in front of the vehicle. In fact, these are affected by greater illuminating power and are therefore more sensitive to heat dissipation.
- the subject matter of the present invention is also a method for producing a heat sink 1 for a light 10 of a vehicle.
- this heat sink 1 has one or more of the characteristics described hereinabove.
- the method comprises the step of producing a body 11 of the heat sink 1 by die casting, preferably comprising an aluminium and/or magnesium alloy (such alloy is preferably based on aluminium and magnesium).
- the die casting production step comprises the step of heating the material in the furnace which will then be introduced into a specific mould. In this way, it may assume the desired shape.
- the method characteristically comprises the step of anodising at least part of (preferably all of) the body 11 to create a surface layer of oxide to protect against corrosive phenomena.
- the step of anodising the body 11 comprises the step of dipping the body 11 into an electrolytic bath (typically comprising sulphuric acid). An external cathode in contact with the bath and the body 11 (which defines the anode) then constitute an electrolytic cell.
- the method further comprises the step of positioning at least a part of the heat sink 1 outside a housing compartment 4 for the light source 3, and near to said housing compartment 4.
- the heat sink 1 contributes to defining the compartment 4.
- the compartment 4 is delimited by the heat sink 1 and by an at least partially transparent element 5 that are mutually opposite.
- the transparent element 5 allows the light to leave the compartment 4 to illuminate the space in front of the vehicle.
- the element 5 may also be defined as a protective paraboloid.
- a paraboloid 6 may be provided inside the compartment 4 which directs the light emitted by the light source 3.
- a paraboloid 6 is made of metal-plated plastic material. The present invention provides important advantages.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17425032.4A EP3375913A1 (fr) | 2017-03-15 | 2017-03-15 | Dissipateur thermique et méthode pour sa fabrication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17425032.4A EP3375913A1 (fr) | 2017-03-15 | 2017-03-15 | Dissipateur thermique et méthode pour sa fabrication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3375913A1 true EP3375913A1 (fr) | 2018-09-19 |
Family
ID=58709432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17425032.4A Withdrawn EP3375913A1 (fr) | 2017-03-15 | 2017-03-15 | Dissipateur thermique et méthode pour sa fabrication |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP3375913A1 (fr) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120201043A1 (en) * | 2011-02-09 | 2012-08-09 | Dipenti Timothy | Headlamp Assembly with Planar Heat Sink Structure |
| US20160084460A1 (en) * | 2014-09-24 | 2016-03-24 | Truck-Lite Co., Llc | Headlamp with Lens Reflector Subassembly |
-
2017
- 2017-03-15 EP EP17425032.4A patent/EP3375913A1/fr not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120201043A1 (en) * | 2011-02-09 | 2012-08-09 | Dipenti Timothy | Headlamp Assembly with Planar Heat Sink Structure |
| US20160084460A1 (en) * | 2014-09-24 | 2016-03-24 | Truck-Lite Co., Llc | Headlamp with Lens Reflector Subassembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20190320 |