EP2995856B1 - Device for lighting in an aquatic medium - Google Patents
Device for lighting in an aquatic medium Download PDFInfo
- Publication number
- EP2995856B1 EP2995856B1 EP15177311.6A EP15177311A EP2995856B1 EP 2995856 B1 EP2995856 B1 EP 2995856B1 EP 15177311 A EP15177311 A EP 15177311A EP 2995856 B1 EP2995856 B1 EP 2995856B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resin layer
- circuit board
- printed circuit
- collimators
- front surface
- 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.)
- Active
Links
- 229920005989 resin Polymers 0.000 claims description 104
- 239000011347 resin Substances 0.000 claims description 104
- 230000001681 protective effect Effects 0.000 claims description 45
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- -1 polysiloxanes Polymers 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical class COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 229920006397 acrylic thermoplastic Polymers 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 description 13
- 230000000295 complement effect Effects 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 239000004033 plastic Substances 0.000 description 8
- 239000011521 glass Substances 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002470 thermal conductor Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/005—Sealing arrangements therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
- F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/04—Provision of filling media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
- F21V23/005—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate is supporting also the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/508—Cooling arrangements characterised by the adaptation for cooling of specific components of electrical circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0091—Reflectors for light sources using total internal reflection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the metal platinum is subjected to the external pressure of the aquatic environment.
- the metal plate rigid, transmits very important constraints to the seal.
- the seal suffers compression losses due to differential expansion with the metal plate, which is detrimental in terms of service life of the seal, and hence the device.
- thermally conductive is meant a layer of resin which has a thermal conductivity adapted to dissipate the heat produced by the light-emitting means, the resin layer being able to have a relationship with the conductivity of the air greater than or equal to at 5.
- the resin layer and the collimators have an interface, and the collimators are adapted so that the interface has a surface tension of between 65 ⁇ 10 -5 N (65 dyn) and 80 ⁇ 10 -5 N (80 dyn). .
- the ratio between the area of said direct contact surface and the area of the front surface is greater than or equal to 5%, preferably greater than or equal to 10%, still more preferably greater than or equal to 20%. %.
- the heat transfer means comprise a heat exchanger interposed between the electronic card and the resin layer, the heat exchanger being preferably selected from the group comprising a metal plate or a U-shaped fin heat exchanger. .
- the device comprises collimators arranged to collimate the light emitted by the light emitting means.
- the resin layer has a coefficient of expansion adapted to the coefficient of expansion of the electronic card and the temperature of the aquatic medium so as to avoid in particular tearing of the light emitting means when the device is immersed in the aquatic environment.
- the light emitting means 2 can be distributed to the front surface 11 of the electronic card 1 so as to avoid a local concentration of heat.
- the distances between two adjacent areas of the front surface 11 occupied by the light emitting means 2 may be substantially identical.
- the light emission means 2 are equipped with a temperature sensor which makes it possible to inform a control unit to reduce the intensity consumed as soon as there is a significant heating of the electronic card 1.
- the third device differs from the first device in that it has no collimators, and in that the resin layer 3 extends over the entire front surface 11 of the electronic card 1 in direct contact.
- the resin layer 3 is transparent or translucent in the visible range.
- the resin layer 3 is made preferably based on a casting resin selected from the group comprising polyurethanes and polysiloxanes. Thus, such resins can combine an excellent transmission of light and a thermal conductivity significantly higher than that of air, the ratio being greater than 7.
- the sixth device differs from the first device in that the protective cover 4 comprises an optical 40 that can be made of glass or a transparent or translucent plastic material in the visible range.
- the optics 40 is arranged opposite the light emission means 2.
- the electronic card 1 comprises a surface, said rear surface 13, opposite to the front surface 11, and the resin layer 3 extends over the entire rear surface 13 of the electronic card 1 in direct contact.
- the electronic card 1 comprises control circuits 6 of the light emission means 2.
- the control circuits 6 are arranged on the front surface 11 of the electronic card 1.
- the figure 9 also shows a connection wire 7 to the electronic card 1.
- This embodiment is particularly suitable for an electronic card 1 SMI type (Isolated Metal Substrate), the heat produced by the light emission means 2 accumulating mainly at the rear surface 13 of the electronic card 1.
- SMI type Isolated Metal Substrate
- the seventh device differs from the modes illustrated in Figures 9 and 10 in that the heat transfer means comprise a heat exchanger 5 interposed between the electronic card 1 and the resin layer 3.
- the heat exchanger 5 is a metal plate extending over the entire rear surface 13 of the electronic card 1 in direct contact.
- the resin layer 3 is arranged to cover the metal plate.
- the resin layer 3 is arranged to cover the metal plate.
- the resin layer 3 is shaped to interpose between the metal plate and said parts of the protective cover 4 so as to seal the protective cover 4 with the heat exchange surface 30 of the resin layer 3.
- the heat exchange surface 30 is flush with said parts of the protective cover 4.
- the ninth device differs from the first device in that the protective cover 4 comprises optics 40 can be made of glass or a transparent or translucent plastic material in the visible range.
- the optics 40 are arranged opposite the light emission means 2.
- the optics 40 of the protective cover 4 occupy a peripheral zone of the front surface 11 of the electronic card 1.
- the heat transfer means comprise a heat exchanger 5, of the platinum metal type, extending over a central part of the surface before 11 of the electronic card 1.
- the resin layer 3 is arranged to cover the metal plate.
- the resin layer 3 is shaped to interpose between the metal plate and said optics 40 of the protective cover 4 so as to seal the protective cover 4 with the heat exchange surface 30 of the resin layer 3 .
- the heat exchange surface 30 is flush with said optics 40 of the protective cover 4.
- the tenth device differs from the first device in that the protective cover 4 comprises an optical 40 can be made of glass or a transparent or translucent plastic material in the visible range.
- the optics 40 is arranged opposite the light emission means 2.
- the optics 40 occupy entirely the front surface 11 of the electronic card 1.
- the heat transfer means comprise a heat exchanger 5, of the platinum metal type, mounted on the protective cap 4 so as to extend over the entire surface rear 13 of the electronic card 1 in direct contact.
- the resin layer 3 rests on the metal plate.
- the resin layer 3 is shaped to interpose between the optic 40 and the protective cap 4 so as to seal the protective cap 4 with the heat exchange surface 30 of the resin layer 3.
- the twelfth device differs from the first device in that a resin layer 3 extends over the entire rear surface 13 of the electronic card 1 in direct contact.
- the thirteenth device differs from the sixth device illustrated in FIG. figure 9 in that the protective cover 4 comprises a half-shell on which the optics 40 is mounted.
- the half-shell is arranged facing the resin layer 3.
- the half-shell is provided with orifices 8 adapted to allow the entry of water from the aquatic environment into the enclosure 9 delimited by the half-shell.
- the resin layer 3 has a heat exchange surface 30 with direct contact with the aquatic environment.
- the heat exchanger 5 is of the U-shaped exchanger type.
- the fourteenth device differs from the thirteenth device illustrated in FIG. figure 17 in that a heat exchanger 5, of the U-shaped exchanger type, is interposed between a central zone of the rear surface 13 of the electronic card 1 and the resin layer 3.
- the heat exchanger 5 is a metal plate interposed between the rear surface 13 of the electronic card and the resin layer 3.
- the device differs from the first device in that the collimators 310 comprise a shoulder 32 extending on the front surface 11 of the electronic card 1.
- the resin layer 3 extends on the shoulder 32.
- the shoulder 32 has a substantially L-shaped cross section.
Description
La présente invention concerne un dispositif d'éclairage en milieu aquatique.The present invention relates to a lighting device in an aquatic environment.
Un dispositif d'éclairage en milieu aquatique connu de l'état de la technique, notamment du document
- une carte électronique comportant une surface, dite surface avant,
- des moyens d'émission de lumière montés sur la surface avant de la carte électronique,
- un capot de protection agencé pour protéger la carte électronique et les moyens d'émission de lumière,
- des moyens de transfert thermique agencés pour transférer la chaleur produite par les moyens d'émission de lumière vers le milieu aquatique.
- an electronic card comprising a surface, said front surface,
- light emitting means mounted on the front surface of the electronic card,
- a protective cover arranged to protect the electronic card and the light-emitting means,
- heat transfer means arranged to transfer the heat produced by the light emitting means to the aquatic environment.
Les moyens de transfert thermique comportent une platine métallique montée sur la surface, dite arrière, opposée à la surface avant de la carte électronique. La platine métallique est destinée à être immergée dans le milieu aquatique afin de bénéficier d'un échange thermique avec le milieu aquatique pour être refroidie. La platine métallique permet donc de dissiper la chaleur produite essentiellement par les moyens d'émission de lumière, tels que des diodes électroluminescentes, notamment de puissance. En effet, en l'absence de moyens de transfert thermique, il est observé que la température de la carte électronique augmente fortement, ce qui peut détériorer la carte électronique et les moyens d'émission de lumière en cas de fonctionnement prolongé du dispositif.The heat transfer means comprise a metal plate mounted on the surface, said back, opposite to the front surface of the electronic card. The metal plate is intended to be immersed in the aquatic environment to benefit from a heat exchange with the aquatic environment to be cooled. The metal plate thus makes it possible to dissipate the heat produced essentially by the light-emitting means, such as light-emitting diodes, especially power diodes. Indeed, in the absence of heat transfer means, it is observed that the temperature of the electronic card increases sharply, which can deteriorate the electronic card and the light emitting means in case of prolonged operation of the device.
Cependant, un tel dispositif de l'état de la technique n'est pas entièrement satisfaisant dans la mesure où il nécessite un joint d'étanchéité conique, typiquement en caoutchouc, disposé entre la platine métallique et le capot de protection, de manière à empêcher la mise en contact de la carte électronique et des moyens d'émission de lumière avec le milieu aquatique.However, such a device of the state of the art is not entirely satisfactory insofar as it requires a conical seal, typically rubber, disposed between the metal plate and the protective cover, so as to prevent contacting the electronic card and the light emitting means with the aquatic medium.
Or, ce joint d'étanchéité conique nécessite la formation d'épaulements dans le capot de protection afin de créer des surfaces de support pour le joint d'étanchéité. La formation d'épaulements dans le capot de protection entraîne également la formation d'épaulements dans la platine métallique. En effet, la platine métallique repose en partie sur la surface arrière de la carte électronique, et en partie sur les épaulements du capot de protection. Par conséquent, un tel dispositif de l'état de la technique introduit une complexité dans sa fabrication par des usinages spécifiques du capot de protection et de la platine métallique.However, this conical seal requires the formation of shoulders in the protective cover to create support surfaces for the seal sealing. The formation of shoulders in the protective cap also causes the formation of shoulders in the metal plate. Indeed, the metal plate rests partly on the rear surface of the electronic card, and partly on the shoulders of the protective cover. Therefore, such a device of the state of the art introduces complexity in its manufacture by specific machining of the protective cover and the metal plate.
Par ailleurs, la platine métallique est soumise à la pression extérieure du milieu aquatique. Or, la platine métallique, rigide, transmet des contraintes très importantes au joint d'étanchéité. Le joint d'étanchéité subit des pertes en compression en raison de dilatations différentielles avec la platine métallique, ce qui est préjudiciable en terme de durée de vie du joint d'étanchéité, et par là-même du dispositif.In addition, the metal platinum is subjected to the external pressure of the aquatic environment. However, the metal plate, rigid, transmits very important constraints to the seal. The seal suffers compression losses due to differential expansion with the metal plate, which is detrimental in terms of service life of the seal, and hence the device.
Le document
- une carte électronique comportant une surface, dite surface avant,
- des moyens d'émission de lumière montés sur la surface avant de la carte électronique,
- un capot de protection agencé pour protéger la carte électronique et les moyens d'émission de lumière,
- des moyens de transfert thermique agencés pour transférer la chaleur produite par les moyens d'émission de lumière vers le milieu aquatique,
- an electronic card comprising a surface, said front surface,
- light emitting means mounted on the front surface of the electronic card,
- a protective cover arranged to protect the electronic card and the light-emitting means,
- heat transfer means arranged to transfer the heat produced by the light-emitting means to the aquatic environment,
Par « couche de résine », on entend une couche réalisée dans un matériau à base d'une résine. Ledit matériau peut être monocomposant ou multicomposant. Ledit matériau peut être utilisé pour des opérations d'enrobage ou de remplissage (« potting » en langue anglaise). Ledit matériau peut être une colle.By "resin layer" is meant a layer made of a material based on a resin. Said material may be monocomponent or multicomponent. Said material can be used for coating or filling operations ("potting" in English). Said material can be an adhesive.
Par « thermiquement conductrice », on entend une couche de résine qui présente une conductivité thermique adaptée pour dissiper la chaleur produite par les moyens d'émission de lumière, la couche de résine pouvant présenter un rapport avec la conductivité de l'air supérieur ou égal à 5.By "thermally conductive" is meant a layer of resin which has a thermal conductivity adapted to dissipate the heat produced by the light-emitting means, the resin layer being able to have a relationship with the conductivity of the air greater than or equal to at 5.
Il est à noter qu'une couche de résine ne se confond pas avec une mousse.It should be noted that a layer of resin is not confused with a foam.
Ainsi, une telle couche de résine permet d'assurer à la fois :
- le transfert de la chaleur produite par les moyens d'émission de lumière vers la surface d'échange thermique, et
- l'étanchéité du capot de protection avec la surface d'échange thermique de manière à empêcher la mise en contact de la carte électronique et des moyens d'émission de lumière avec le milieu aquatique.
- transferring the heat produced by the light emitting means to the heat exchange surface, and
- sealing the protective cover with the heat exchange surface so as to prevent contact of the electronic card and the light emitting means with the aquatic medium.
Un tel dispositif selon l'invention peut donc être fabriqué aisément en l'absence de joint d'étanchéité dédié et d'usinages spécifiques notamment du capot de protection.Such a device according to the invention can therefore be easily manufactured in the absence of a dedicated seal and specific machining including the protective cover.
En outre, une telle couche de résine permet de mieux absorber la pression extérieure du milieu aquatique relativement à une platine métallique, ce qui permet d'améliorer la durée de vie du dispositif.In addition, such a resin layer makes it possible to better absorb the external pressure of the aquatic medium relative to a metal plate, which makes it possible to improve the service life of the device.
Le dispositif comporte des collimateurs agencés sur la surface avant de la carte électronique pour collimater la lumière émise par les moyens d'émission de lumière, et la couche de résine présente une épaisseur inférieure à la hauteur des collimateurs.The device comprises collimators arranged on the front surface of the electronic card to collimate the light emitted by the light emitting means, and the resin layer has a thickness less than the height of the collimators.
Ainsi, il est possible d'obtenir un dispositif d'éclairage en milieu aquatique à grande distance, compact et simple à fabriquer. Une telle épaisseur de résine permet de s'affranchir de la présence moyens de blocage en translation sur les collimateurs pour bloquer en translation la résine suivant la direction perpendiculaire à la surface avant en cas de surmoulage au-dessus des collimateurs.Thus, it is possible to obtain a lighting device in a long distance aquatic environment, compact and simple to manufacture. Such a resin thickness makes it possible to overcome the presence of translation locking means on the collimators in order to block the resin in translation in the direction perpendicular to the front surface in case of overmoulding above the collimators.
Avantageusement, les collimateurs comportent un épaulement s'étendant sur la surface avant de la carte électronique, et la couche de résine s'étend sur l'épaulement.Advantageously, the collimators comprise a shoulder extending on the front surface of the electronic card, and the resin layer extends on the shoulder.
Ainsi, un tel épaulement permet d'améliorer significativement l'adhérence et l'étanchéité de la couche de résine avec les collimateurs.Thus, such a shoulder significantly improves the adhesion and sealing of the resin layer with the collimators.
Avantageusement, l'épaisseur de la couche de résine et la hauteur des collimateurs présentent un ratio supérieur à 0,7, de préférence compris entre 0,85 et 0,95.Advantageously, the thickness of the resin layer and the height of the collimators have a ratio greater than 0.7, preferably between 0.85 and 0.95.
Ainsi, un tel ratio permet d'allier une bonne conductivité thermique de la couche de résine et une bonne étanchéité entre la couche de résine et les collimateurs.Thus, such a ratio makes it possible to combine a good thermal conductivity of the resin layer and a good seal between the resin layer and the collimators.
Avantageusement, la couche de résine et les collimateurs présentent une interface, et les collimateurs sont adaptés de sorte que l'interface possède une tension de surface comprise entre 65 x10-5 N (65 dyn) et 80 x10-5 N (80 dyn).Advantageously, the resin layer and the collimators have an interface, and the collimators are adapted so that the interface has a surface tension of between 65 × 10 -5 N (65 dyn) and 80 × 10 -5 N (80 dyn). .
Ainsi, une telle tension de surface permet d'obtenir une interface avec une excellente étanchéité. Les collimateurs sont préférentiellement adaptés au moyen d'un traitement de surface tel que le flammage.Thus, such a surface tension makes it possible to obtain an interface with excellent sealing. The collimators are preferably adapted by means of a surface treatment such as flaming.
Dans un mode de réalisation, le rapport entre l'aire de ladite surface de contact direct et l'aire de la surface avant est supérieur ou égal à 5%, de préférence supérieur ou égal à 10%, encore préférentiellement supérieur ou égal à 20%.In one embodiment, the ratio between the area of said direct contact surface and the area of the front surface is greater than or equal to 5%, preferably greater than or equal to 10%, still more preferably greater than or equal to 20%. %.
Ainsi, le fait que la couche de résine est en contact direct avec la surface avant de la carte électronique permet de supprimer l'air entre la carte électronique et le capot de protection, et d'améliorer par là-même la dissipation de chaleur car l'air est un mauvais conducteur thermique. L'aire de la surface de contact direct est adaptée à la puissance des moyens d'émission de lumière.Thus, the fact that the resin layer is in direct contact with the front surface of the electronic card makes it possible to eliminate the air between the electronic card and the protective cap, and to thereby improve the heat dissipation because the air is a bad thermal conductor. The area of the direct contact surface is adapted to the power of the light emitting means.
Dans un mode de réalisation, la couche de résine s'étend sur toute la surface avant de la carte électronique en contact direct.In one embodiment, the resin layer extends over the entire front surface of the electronic board in direct contact.
Ainsi, la dissipation de la chaleur produite par les moyens d'émission de lumière est facilitée en augmentant l'aire de la surface d'échange thermique.Thus, the dissipation of the heat produced by the light emitting means is facilitated by increasing the area of the heat exchange surface.
Dans un mode de réalisation, la carte électronique comporte une surface, dite surface arrière, opposée à la surface avant, la couche de résine présente une surface de contact direct avec la surface arrière de la carte électronique, et le rapport entre l'aire de ladite surface de contact direct et l'aire de la surface arrière est supérieur ou égal à 5%, de préférence supérieur ou égal à 10%, encore préférentiellement supérieur ou égal à 20%.In one embodiment, the electronic board has a surface, said rear surface, opposite to the front surface, the resin layer has a surface of direct contact with the rear surface of the electronic board, and the ratio of the area of said direct contact surface and the area of the rear surface is greater than or equal to 5%, preferably greater than or equal to 10%, still more preferably greater than or equal to 20%.
Ainsi, pour certaines cartes électroniques, par exemple de type SMI (Substrat Métallique Isolé), la chaleur produite par les moyens d'émission de lumière s'accumule principalement à la surface arrière de la carte électronique. Le fait que la couche de résine est en contact direct avec la surface arrière de la carte électronique permet le transfert de ladite chaleur vers la surface d'échange thermique.Thus, for some electronic cards, for example of the SMI (Isolated Metal Substrate) type, the heat produced by the light emitting means mainly accumulates on the rear surface of the electronic card. The fact that the resin layer is in direct contact with the back surface of the electronic card allows the transfer of said heat to the heat exchange surface.
Dans un mode de réalisation, la carte électronique comporte une surface, dite surface arrière, opposée à la surface avant, et la couche de résine s'étend sur toute la surface arrière de la carte électronique en contact direct.In one embodiment, the electronic board has a surface, said rear surface, opposite the front surface, and the resin layer extends over the entire rear surface of the electronic card in direct contact.
Ainsi, la dissipation de la chaleur produite par les moyens d'émission de lumière est facilitée en augmentant l'aire de la surface d'échange thermique.Thus, the dissipation of the heat produced by the light emitting means is facilitated by increasing the area of the heat exchange surface.
Dans un mode de réalisation, les moyens de transfert thermique comportent un échangeur de chaleur interposé entre la carte électronique et la couche de résine, l'échangeur de chaleur étant de préférence sélectionné dans le groupe comportant une platine métallique ou un échangeur à ailettes en U.In one embodiment, the heat transfer means comprise a heat exchanger interposed between the electronic card and the resin layer, the heat exchanger being preferably selected from the group comprising a metal plate or a U-shaped fin heat exchanger. .
Ainsi, le fait d'intercaler un échangeur de chaleur entre la carte électronique et la couche de résine permet de réduire l'épaisseur de la couche de résine nécessaire pour obtenir une surface d'échange thermique à contact direct avec le milieu aquatique.Thus, the fact of inserting a heat exchanger between the electronic card and the resin layer makes it possible to reduce the thickness of the resin layer necessary to obtain a heat exchange surface with direct contact with the aquatic environment.
Avantageusement, la couche de résine est agencée pour recouvrir l'échangeur de chaleur.Advantageously, the resin layer is arranged to cover the heat exchanger.
Ainsi, une telle couche de résine assure la fonction supplémentaire de protection de l'échangeur de chaleur, notamment contre la corrosion.Thus, such a resin layer provides the additional function of protecting the heat exchanger, in particular against corrosion.
Dans un mode de réalisation, le dispositif comporte des collimateurs agencés pour collimater la lumière émise par les moyens d'émission de lumière.In one embodiment, the device comprises collimators arranged to collimate the light emitted by the light emitting means.
Ainsi, il est possible d'obtenir un éclairage en milieu aquatique à grande distance.Thus, it is possible to obtain lighting in the aquatic environment at great distances.
Le dispositif comporte des orifices traversant ménagés dans la carte électronique en regard des collimateurs.The device comprises through orifices formed in the electronic card facing the collimators.
Ainsi, de tels orifices traversant permettent d'éviter la formation de bulles d'air dans la couche de résine issu de l'air emprisonné entre les collimateurs et la carte électronique. De tels orifices traversant permettent d'évacuer l'air.Thus, such through holes prevent the formation of air bubbles in the resin layer from the air trapped between the collimators and the electronic card. Such through holes allow to evacuate the air.
Avantageusement, la couche de résine comporte une charge métallique.Advantageously, the resin layer comprises a metal filler.
Ainsi, la présence d'une charge métallique permet d'augmenter la conductivité thermique de la couche de résine, et par là-même d'améliorer le transfert de la chaleur produite par les moyens d'émission de lumière vers la surface d'échange thermique.Thus, the presence of a metal filler makes it possible to increase the thermal conductivity of the resin layer, and thereby to improve the transfer of the heat produced by the light-emitting means towards the exchange surface. thermal.
Dans un mode de réalisation, la couche de résine présente un coefficient de dilatation adapté relativement au coefficient de dilatation de la carte électronique et à la température du milieu aquatique de manière à éviter notamment l'arrachement des moyens d'émission de lumière lorsque le dispositif est immergé dans le milieu aquatique.In one embodiment, the resin layer has a coefficient of expansion adapted to the coefficient of expansion of the electronic card and the temperature of the aquatic medium so as to avoid in particular tearing of the light emitting means when the device is immersed in the aquatic environment.
Ainsi, une telle couche de résine permet de protéger la carte électronique de déformations liées à la pression extérieure du milieu aquatique.Thus, such a layer of resin protects the electronic map deformations related to the external pressure of the aquatic environment.
Selon une forme d'exécution, la couche de résine est réalisée à base d'une résine de coulée sélectionnée dans le groupe comportant les polyépoxydes, les polyuréthanes, les polyesters et les polysiloxanes, les acryliques et les méthacrylates de méthyle.According to one embodiment, the resin layer is made based on a casting resin selected from the group comprising polyepoxides, polyurethanes, polyesters and polysiloxanes, acrylics and methyl methacrylates.
Ainsi, de telles résines sont choisies notamment pour leur souplesse et leur conductivité thermique nettement supérieure à celle de l'air.Thus, such resins are chosen in particular for their flexibility and their thermal conductivity much higher than that of air.
D'autres caractéristiques et avantages apparaîtront dans la description qui va suivre de différents modes de réalisation d'un dispositif selon l'invention, donnés à titre d'exemples non limitatifs, en référence aux dessins annexés dans lesquels :
- la
figure 1 est une vue en perspective éclatée d'un premier dispositif selon l'invention avant la formation de la couche de résine, - la
figure 2 est une vue en perspective du dispositif illustré à lafigure 1 , - la
figure 3 est une vue en perspective du dispositif illustré à lafigure 1 après la formation de la couche de résine, - la
figure 4 est une vue de détail en perspective du dispositif illustré à lafigure 3 , - la
figure 5 est une vue partielle en coupe à l'échelle agrandie d'un deuxième dispositif selon l'invention, - la
figure 6 est une vue partielle en coupe d'un troisième dispositif non-revendiqué, - la
figure 7 est une vue partielle en coupe d'un quatrième dispositif non-revendiqué, - la
figure 8 est une vue en coupe d'un cinquième dispositif non-revendiqué, - la
figure 9 est une vue en coupe d'un sixième dispositif non-revendiqué, - la
figure 10 est une vue en coupe d'une variante du sixième non-revendiqué, - la
figure 11 est une vue en coupe d'un septième dispositif non-revendiqué, - la
figure 12 est une vue en coupe d'un huitième dispositif non-revendiqué, - la
figure 13 est une vue en coupe d'un neuvième dispositif non-revendiqué, - la
figure 14 est une vue en coupe d'un dixième dispositif non-revendiqué, - la
figure 15 est une vue partielle en coupe d'un onzième dispositif non-revendiqué, - la
figure 16 est une vue en coupe d'un douzième dispositif selon l'invention, - la
figure 17 est une vue en coupe d'un treizième dispositif non-revendiqué, - la
figure 18 est une vue en coupe d'une variante non-revendiqué du neuvième dispositif illustré à lafigure 13 , - la
figure 19 est une vue en coupe d'un quatorzième dispositif non-revendiqué, - la
figure 20 est une vue partielle en coupe d'un dispositif selon l'invention.
- the
figure 1 is an exploded perspective view of a first device according to the invention before the formation of the resin layer, - the
figure 2 is a perspective view of the device shown infigure 1 , - the
figure 3 is a perspective view of the device shown infigure 1 after the formation of the resin layer, - the
figure 4 is a detailed perspective view of the device shown in FIG.figure 3 , - the
figure 5 is a partial sectional view on an enlarged scale of a second device according to the invention, - the
figure 6 is a partial sectional view of a third device not claimed, - the
figure 7 is a partial sectional view of a fourth device not claimed, - the
figure 8 is a sectional view of a fifth unclaimed device, - the
figure 9 is a sectional view of a sixth unclaimed device, - the
figure 10 is a sectional view of a variant of the unclaimed sixth, - the
figure 11 is a sectional view of a seventh unclaimed device, - the
figure 12 is a sectional view of an eighth unclaimed device, - the
figure 13 is a sectional view of a ninth unclaimed device, - the
figure 14 is a sectional view of a tenth unclaimed device, - the
figure 15 is a partial sectional view of an eleventh unclaimed device, - the
figure 16 is a sectional view of a twelfth device according to the invention, - the
figure 17 is a sectional view of a thirteenth unclaimed device, - the
figure 18 is a sectional view of an unclaimed variant of the ninth device shown in FIG.figure 13 , - the
figure 19 is a sectional view of a fourteenth unclaimed device, - the
figure 20 is a partial sectional view of a device according to the invention.
Pour les différents modes de réalisation, les mêmes références seront utilisées pour des éléments identiques ou assurant la même fonction, par souci de simplification de la description. Les caractéristiques techniques décrites ci-après pour différents modes de réalisation sont à considérer isolément ou selon toute combinaison techniquement possible.For the different embodiments, the same references will be used for identical elements or ensuring the same function, for the sake of simplification of the description. The technical characteristics described below for different embodiments are to be considered in isolation or in any technically possible combination.
Le premier dispositif illustré aux
- une carte électronique 1 comportant une surface,
dite surface avant 11, - des moyens d'émission 2 de lumière, de préférence de type diode électroluminescente, montés sur la
surface avant 11 de la carte électronique 1, - un
capot de protection 4 agencé pour protéger la carte électronique 1 et les moyens d'émission 2 de lumière, - des moyens de transfert thermique agencés pour transférer la chaleur produite par les moyens d'émission 2 de lumière vers le milieu aquatique.
- an
electronic card 1 comprising a surface, saidfront surface 11, - light emitting means 2, preferably light-emitting diode type, mounted on the
front surface 11 of theelectronic card 1, - a
protective cover 4 arranged to protect theelectronic card 1 and the light emission means 2, - heat transfer means arranged to transfer the heat produced by the light emitting means 2 to the aquatic medium.
La carte électronique 1 comporte un circuit de commande des moyens d'émission 2 de lumière. La carte électronique 1 présente préférentiellement la forme d'un disque. A titre d'exemple non limitatif, la carte électronique 1 peut également présenter la forme d'un parallélépipède. La surface avant 11 de la carte électronique 1 est avantageusement plane. La surface avant 11 de la carte électronique 1 est de préférence circulaire. La carte électronique 1 peut être réalisée dans un matériau qui est un bon conducteur thermique afin de répartir uniformément la chaleur produite par les moyens d'émission 2 de lumière à la surface avant 11 de la carte électronique 1. La surface avant 11 de la carte électronique 1 peut comporter un revêtement adapté pour réfléchir la lumière et/ou la chaleur afin d'accroître le transfert de chaleur vers la surface d'échange thermique 30.The
Les moyens d'émission 2 de lumière peuvent être répartis à la surface avant 11 de la carte électronique 1 de manière à éviter une concentration locale de chaleur. Ainsi, les distances entre deux zones voisines de la surface avant 11 occupées par les moyens d'émission 2 de lumière peuvent être sensiblement identiques.The light emitting means 2 can be distributed to the
Le dispositif comporte des collimateurs 310 agencés sur la surface avant 11 de la carte électronique 1 pour collimater la lumière émise par les moyens d'émission 2 de lumière. Les collimateurs 310 peuvent être reliés entre eux par des branches 311 de manière à former un réseau 31 de collimateurs 310. De tels collimateurs 310 en réseau sont simples à installer. Le réseau 31 de collimateurs 310 est de préférence réalisé dans un matériau plastique. Le réseau 31 de collimateurs 310 peut être équipé d'une optique adaptée pour autoriser des jeux de lumière tels que le mélange des couleurs. Le réseau 31 de collimateurs 310 occupe une zone de la surface avant 11 de la carte électronique 1.The device comprises
Le capot de protection 4 est une demi-coque en forme de demi-sphère pouvant être réalisée dans une matière plastique. D'autres formes pour le capot de protection 4 sont bien entendu possibles. Le capot de protection 4 délimite une enceinte à l'intérieur de laquelle est disposée la carte électronique 1.
Les moyens de transfert thermique comportent une couche de résine 3 thermiquement conductrice présentant une surface d'échange thermique 30 à contact direct avec le milieu aquatique. La couche de résine 3 est agencée relativement à la carte électronique 1 pour transférer la chaleur produite par les moyens d'émission 2 de lumière vers la surface d'échange thermique 30. Plus précisément, la couche de résine 3 s'étend sur la zone complémentaire de la surface avant 11 de la carte électronique 1 en contact direct. Par « complémentaire », on entend la signification mathématique du terme ; la surface avant 11 de la carte électronique est un ensemble, la zone occupée par le réseau 31 de collimateurs 310 est une partie de cet ensemble et le complémentaire de ladite zone occupée (dite zone complémentaire) est l'ensemble des éléments de la surface avant 11 de la carte électronique 1 n'appartenant pas à ladite zone occupée. La couche de résine 3 est conformée relativement au capot de protection 4 pour assurer l'étanchéité du capot de protection 4 avec la surface d'échange thermique 30. La couche de résine 3 peut comporter une charge métallique. La couche de résine 3 présente avantageusement un coefficient de dilatation adapté relativement au coefficient de dilatation de la carte électronique 1 et à la température du milieu aquatique de manière à éviter notamment l'arrachement des moyens d'émission 2 de lumière lorsque le dispositif est immergé dans le milieu aquatique. La couche de résine 3 peut être transparente, translucide ou opaque dans le domaine visible. La couche de résine 3 est réalisée préférentiellement à base d'une résine de coulée sélectionnée dans le groupe comportant les polyépoxydes, les polyuréthanes, les polyesters, les polysiloxanes, les acryliques et les méthacrylates de méthyle. La couche de résine 3 présente avantageusement une épaisseur inférieure à la hauteur des collimateurs 310.The
The heat transfer means comprise a layer of thermally
Une expérience a été menée lorsque la couche de résine 3 est à base de polyuréthane, et dont les résultats sont rassemblés dans le tableau ci-après. Le tableau montre l'intensité consommée (u.a.) par les moyens d'émission 2 de lumière en fonction de la température du milieu aquatique et de l'épaisseur de la couche de résine.An experiment was conducted when the
Les moyens d'émission 2 de lumière sont équipés d'une sonde de température qui permet d'informer une unité de commande de diminuer l'intensité consommée dès qu'il existe un échauffement important de la carte électronique 1.The light emission means 2 are equipped with a temperature sensor which makes it possible to inform a control unit to reduce the intensity consumed as soon as there is a significant heating of the
Les moyens d'émission 2 de lumière doivent fonctionner classiquement jusqu'à une température de 40°C.
Il résulte du tableau que l'épaisseur de la couche de résine 3 en polyuréthane doit être inférieure à 5 mm. Au-dessus de cette valeur, la conduction thermique de la couche de résine 3 n'est pas suffisante pour assurer un transfert thermique efficace vers le milieu aquatique. A titre d'exemple, l'épaisseur de la couche de résine 3 peut être de l'ordre de 4,5 mm et la hauteur des collimateurs 310 peut être de l'ordre de 5 mm avec un ratio de l'ordre de 0,9.It follows from the table that the thickness of the
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
La couche de résine 3 s'étend sur la zone complémentaire de la surface avant 11 de la carte électronique 1 en contact direct. Par « complémentaire », on entend la signification mathématique du terme ; la surface avant 11 de la carte électronique est un ensemble, la zone occupée par les optiques 40 du capot de protection 4 est une partie de cet ensemble et le complémentaire de ladite zone occupée (dite zone complémentaire) est l'ensemble des éléments de la surface avant 11 de la carte électronique 1 n'appartenant pas à ladite zone occupée. La zone complémentaire forme une zone centrale entre les optiques 40 et une zone périphérique entre le capot de protection 4 et les optiques 40.The
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Dans le mode de réalisation illustré à la
Un procédé de fabrication du premier dispositif comporte une étape de surmoulage à base de la résine thermiquement conductrice sur la zone complémentaire de la surface avant 11 de la carte électronique 1. Les collimateurs 310 peuvent comporter des moyens de blocage en translation de la résine suivant la direction perpendiculaire à ladite surface avant 11 en cas de surmoulage au-dessus des collimateurs 310. Il est peut être avantageux de former une épaisseur de résine inférieure à la hauteur des collimateurs 310.A manufacturing method of the first device comprises a molding step based on the thermally conductive resin on the complementary area of the
Claims (12)
- Device for lighting in an aquatic medium, comprising:- a printed circuit board (1) comprising a surface, called front surface (11),- light-emitting means (2) mounted on the front surface (11) of the printed circuit board (1),- a protective cover (4, 40) arranged to protect the printed circuit board (1) and the light-emitting means (2),- heat transfer means arranged to perform transfer of the heat produced by the light-emitting means (2) to the aquatic medium, the heat transfer means comprising at least one heat-conducting resin layer (3) presenting a heat exchange surface (30) in direct contact with the aquatic medium, the resin layer (3) being arranged relatively to the printed circuit board (1) to perform transfer of the heat produced by the light-emitting means (2) to the heat exchange surface (30), the resin layer (3) being shaped with respect to the protective cover (4, 40) to ensure the tightness of the protective cover (4, 40) with the heat exchange surface (30), the resin layer (3) presenting a direct contact surface with the front surface (11) of the printed circuit board (1), the device comprising collimators (310) arranged on the front surface (11) of the printed circuit board (1) for collimating the light emitted by the light-emitting means (2), and the resin layer (3) presents a thickness smaller than the height of the collimators (310), characterized in that it comprises through holes (12) arranged in the printed circuit board (1) facing the collimators (310) so as to remove the air (A) trapped between the collimators (310) and the printed circuit board (1).
- Device according to claim 1, characterized in that the collimators (310) comprise a rim (32) extending on the front surface (11) of the printed circuit board (1), and in that the resin layer (3) extends over the rim (32).
- Device according to claim 1 or 2, characterized in that the thickness of the resin layer (3) and the height of the collimators (310) present a ratio of more than 0.7, preferably comprised between 0.85 and 0.95.
- Device according to one of claims 1 to 3, characterized in that the resin layer (3) and the collimators (310) present an interface, and in that the collimators (310) are designed in such a way that the interface has a surface tension comprised between 65 x 10-5 N and 80 x 10-5 N.
- Device according to one of claims 1 to 4, characterized in that the resin layer (3) presents a direct contact surface with the front surface (11) of the printed circuit board (1), and in that the ratio between the area of said direct contact surface and the area of the front surface (11) is greater than or equal to 5%, preferably greater than or equal to 10%, even more preferentially greater than or equal to 20%.
- Device according to one of claims 1 to 5, characterized in that the printed circuit board (1) comprises a surface, called rear surface (13), opposite the front surface (11), in that the resin layer (3) presents a direct contact surface with the rear surface (13) of the printed circuit board (1), and in that the ratio between the area of said direct contact surface and the area of the rear surface (13) is greater than or equal to 5%, preferably greater than or equal to 10%, even more preferentially greater than or equal to 20%.
- Device according to one of claims 1 to 5, characterized in that the printed circuit board (1) comprises a surface, called rear surface (13), opposite the front surface (11), and in that the resin layer (3) extends over the whole rear surface (13) of the printed circuit board (1) in direct contact.
- Device according to one of claims 1 to 7, characterized in that the heat transfer means comprise a heat exchanger (5) placed between the printed circuit board (1) and the resin layer (3), the heat exchanger (5) preferably being selected from the group comprising a metal plate or a U-shaped fin heat exchanger.
- Device according to claim 8, characterized in that the resin layer (3) is arranged so as to cover the heat exchanger (5).
- Device according to one of claims 1 to 9, characterized in that the resin layer (3) comprises a metallic charge.
- Device according to one of claims 1 to 10, characterized in that the resin layer (3) presents a coefficient of expansion that is suitable with respect to the coefficient of expansion of the printed circuit board (1) and the temperature of the aquatic medium in order in particular to prevent the light-emitting means (2) from being torn off when the device is immersed in the aquatic medium.
- Device according to one of claims 1 to 11, characterized in that the resin layer (3) is made from a casting resin selected from the group comprising polyepoxides, polyurethanes, polyesters, polysiloxanes, acrylics and methyl methacrylates.
Priority Applications (1)
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HRP20192137TT HRP20192137T1 (en) | 2014-07-24 | 2019-11-28 | Device for lighting in an aquatic medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR1401697A FR3024210B1 (en) | 2014-07-24 | 2014-07-24 | LIGHTING DEVICE IN AQUATIC ENVIRONMENT |
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EP2995856A1 EP2995856A1 (en) | 2016-03-16 |
EP2995856B1 true EP2995856B1 (en) | 2019-08-28 |
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ES (1) | ES2759232T3 (en) |
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WO2006091538A2 (en) * | 2005-02-22 | 2006-08-31 | Kevin Doyle | An led pool or spa light having a unitary lens body |
FR2935459B1 (en) * | 2008-08-28 | 2011-04-08 | Philippe Poma | LIGHTING DEVICE FOR SWIMMING POOL WITH ATTACHMENT TO A BRUSH SOCKET |
JP4681071B1 (en) * | 2009-12-17 | 2011-05-11 | 株式会社スズデン | lighting equipment |
US20110267834A1 (en) * | 2010-04-28 | 2011-11-03 | Hayward Industries, Inc. | Underwater Light Having A Sealed Polymer Housing and Method of Manufacture Therefor |
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SK500422011A3 (en) * | 2011-10-25 | 2013-05-03 | Leader Light S. R. O. | Device for comprehensive protection against external sources LED weather conditions |
FR2968333B1 (en) * | 2011-11-17 | 2013-05-10 | Royalux | LIGHTING DEVICE FOR SWIMMING POOL. |
DE102012101411B4 (en) * | 2012-02-22 | 2016-02-18 | R.Stahl Schaltgeräte GmbH | Explosion-proof luminaire with cast-in optics |
CN202521428U (en) * | 2012-04-10 | 2012-11-07 | 深圳市日上光电有限公司 | Four-chip light-emitting diode (LED) punched lamp |
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2014
- 2014-07-24 FR FR1401697A patent/FR3024210B1/en active Active
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2015
- 2015-07-17 ES ES15177311T patent/ES2759232T3/en active Active
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2019
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Publication number | Publication date |
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FR3024210A1 (en) | 2016-01-29 |
EP2995856A1 (en) | 2016-03-16 |
FR3024210B1 (en) | 2019-05-31 |
ES2759232T3 (en) | 2020-05-08 |
HRP20192137T1 (en) | 2020-02-21 |
PT2995856T (en) | 2019-12-05 |
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