EP3671023A1 - Échangeur thermique pour composants électroniques - Google Patents

Échangeur thermique pour composants électroniques Download PDF

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Publication number
EP3671023A1
EP3671023A1 EP18214707.4A EP18214707A EP3671023A1 EP 3671023 A1 EP3671023 A1 EP 3671023A1 EP 18214707 A EP18214707 A EP 18214707A EP 3671023 A1 EP3671023 A1 EP 3671023A1
Authority
EP
European Patent Office
Prior art keywords
lighting device
air channel
heat
air
exchange system
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.)
Pending
Application number
EP18214707.4A
Other languages
German (de)
English (en)
Inventor
Samya BELKESSAM
Lotfi REDJEM SAAD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to EP18214707.4A priority Critical patent/EP3671023A1/fr
Priority to PCT/EP2019/085471 priority patent/WO2020127134A1/fr
Publication of EP3671023A1 publication Critical patent/EP3671023A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas

Definitions

  • Lighting devices are used in automobiles and the like, for lighting the path ahead. These lighting devices of modern times use different types of LED light sources owing to their high efficiency better lighting.
  • LED light devices are highly efficient, they generate tremendous amount of heat during operation.
  • LED based lighting devices have negative temperature coefficient aspects, the performance of LEDs is particularly sensitive to heat and excessive temperatures, in addition to reducing the light output of an LED it also shortens the operating life significantly.
  • An object of the present invention is to solve the disadvantages described above of known lighting devices.
  • it is the object of the present invention is to provide a lighting device with a heat exchange system for a lighting device.
  • Another object of the invention is to provide a lighting device with a heat exchange system comprising an integrated air channel.
  • Another object of the invention is to provide a lighting device with a heat exchange system comprising an integrated air channel passing through the airfoils of the heat exchange system.
  • a lighting device comprising a heat exchange system to transfer heat away from the light source of the lighting device.
  • the lighting device comprises a heat exchanger with an integral air channel passing through the fins. Additionally, the lighting device comprises a blower for blowing air through the air channel of the heat exchange system.
  • the heat transfer system has a plenum fixed to it forming the outside portion of the air channel.
  • the heat exchange system of the present invention is provided with a set of external fins extending outside of the air channel formed by the plenum.
  • the invention relates to a lighting device for an automobile comprising a light source for producing a light beam; and a heat exchange system for transferring heat away from the light source, the heat exchange system comprising a plurality of heat transfer airfoils an air channel passing through the plurality of heat transfer airfoils having at least one air inlet portion and at least one air outlet portion, the air channel comprises a plenum forming the outer portion of the air channel and a blower module arranged on the at least one air inlet portion of the air channel, wherein the axis of the blower module is inclined towards the heat zone of the heat exchange system.
  • Figure 1 shows a perspective view of a heat exchange system of a lighting device, according to an embodiment of the present invention.
  • Figure 1a shows an exploded view of a heat exchange system (100) showing the air channel (20) and a plenum (12).
  • the air channel (20) passes through the heat transfer airfoils (10) of the heat exchange system; the air channel (20) further has a curvilinear profile.
  • the outer curve of the air channel (20) is tangential with the hot heat zone (30) of the heat transfer system (100).
  • the air channel (20) has a variable cross sectional area with reducing ration of 0.3 to 0.7 at the outlet portion of the air channel (20) as compared to the inlet portion of the air channel (20).
  • the blower module (14) is assembled at the inlet portion of the air channel (20).
  • Figure 3 shows the side view of the heat exchange system (100) according to the embodiment of the present invention.
  • the figure shows the blower module (14) assembled in relation to the air channel (20).
  • the blower module (14) is assembled such that maximum air is directed to the high heat regions (30) of the heat exchange system (100).
  • the axis (A) of the blower module (14) is inclined towards the heat zone (30) of the heat exchange system (100).
  • the high heat region (30) is formed on the base plate (16) directly behind the light source (32).
  • the light source (32) and the high heat region (30) here are depicted for clarity and reference purpose and should not be taken as restricting the scope of the invention.
  • the light source (32) is a monolithic LED.
  • the blower module (14) blows the air through the air channel (20) and due to the profile of the air channel (20) and the arrangement of the blower module (14) maximum air is directed on the heat zone at high velocity.
  • the high velocity air passing over the heat zone takes away the heat away from the heat region and out of the heat exchange system through the outlet.
  • the heat transfer airfoils (10) which extend outwards from the base plate (16) also carry heat away from the high heat region through conduction.
  • the air channel (20) by design as per the present invention passing through the heat transfer airfoils (10) directs air over the heat transfer airfoils. Due to the passing of the high velocity air over the heat transfer airfoils (10) heat is transferred by means of forced convection.
  • the curvilinear profile and section reduction of the air channel (20) ensures high velocity air across the air channel with minimum turbulence created in the system.
  • Figure 4 shows another embodiment of heat exchange system for a lighting device, of the present invention.
  • the figure shows the plenum (12) attached to the heat transfer airfoils (10). Additionally, the figure shows secondary heat transfer airfoils (18) extending out of the plenum (12).
  • the secondary heat transfer airfoils (18) aid in further heat transfer by means of natural convection. The arrangement increases the heat transfer rate giving more efficiency to the system.
  • FIG. 5 shows the top view of the heat exchange system (100) of figure 4 , according to the embodiment of the present invention.
  • the figure depicts the air channel (20) passing through the heat transfer airfoils (10).
  • the secondary heat transfer airfoils (18) are also shown in the figure.
  • Figure 6 shows the air flow direction for heat transfer as per the present invention.
  • the embodiment as shown in figure 6 works similar to the way the embodiment of Figure 3 works.
  • the current embodiment has secondary heat transfer airfoils (18) extending outwards of the plenum (12). These secondary heat transfer airfoils (18) increase the rate of heat transfer.
  • the present invention can be adapted and modified to perform heat transfer in electronic system.
  • the blower module (14) can be mounted on the outlet of the air channel (20).
  • the blower accordingly can be modified to perform suction of air for heat transfer of the system.
  • the system though effective will have lesser efficiency than the one with blower at inlet of air channel.
  • the profile or the air channel can be adapted to form different profiles without deviating from the scope of present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP18214707.4A 2018-12-20 2018-12-20 Échangeur thermique pour composants électroniques Pending EP3671023A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18214707.4A EP3671023A1 (fr) 2018-12-20 2018-12-20 Échangeur thermique pour composants électroniques
PCT/EP2019/085471 WO2020127134A1 (fr) 2018-12-20 2019-12-17 Échangeur thermique destiné à des composants électroniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18214707.4A EP3671023A1 (fr) 2018-12-20 2018-12-20 Échangeur thermique pour composants électroniques

Publications (1)

Publication Number Publication Date
EP3671023A1 true EP3671023A1 (fr) 2020-06-24

Family

ID=64870344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18214707.4A Pending EP3671023A1 (fr) 2018-12-20 2018-12-20 Échangeur thermique pour composants électroniques

Country Status (2)

Country Link
EP (1) EP3671023A1 (fr)
WO (1) WO2020127134A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4656936A1 (fr) * 2024-05-29 2025-12-03 ZKW Group GmbH Feu de véhicule, en particulier phare de véhicule automobile

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007043961A1 (de) * 2007-09-14 2009-03-19 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung mit Halbleiterlichtquelle
DE102010002664A1 (de) * 2010-03-08 2011-09-08 Osram Gesellschaft mit beschränkter Haftung LED-Leuchte
EP3043107A1 (fr) * 2015-01-09 2016-07-13 Valeo Vision Module optique pour projecteur de véhicule
EP3147556A1 (fr) * 2015-09-24 2017-03-29 Stanley Electric Co., Ltd. Appareil d'éclairage de véhicule

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007043961A1 (de) * 2007-09-14 2009-03-19 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung mit Halbleiterlichtquelle
DE102010002664A1 (de) * 2010-03-08 2011-09-08 Osram Gesellschaft mit beschränkter Haftung LED-Leuchte
EP3043107A1 (fr) * 2015-01-09 2016-07-13 Valeo Vision Module optique pour projecteur de véhicule
EP3147556A1 (fr) * 2015-09-24 2017-03-29 Stanley Electric Co., Ltd. Appareil d'éclairage de véhicule

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4656936A1 (fr) * 2024-05-29 2025-12-03 ZKW Group GmbH Feu de véhicule, en particulier phare de véhicule automobile

Also Published As

Publication number Publication date
WO2020127134A1 (fr) 2020-06-25

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