EP1467142B1 - Luminaire recessed in the ground comprising a temperature reduction system - Google Patents

Luminaire recessed in the ground comprising a temperature reduction system Download PDF

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Publication number
EP1467142B1
EP1467142B1 EP04356021A EP04356021A EP1467142B1 EP 1467142 B1 EP1467142 B1 EP 1467142B1 EP 04356021 A EP04356021 A EP 04356021A EP 04356021 A EP04356021 A EP 04356021A EP 1467142 B1 EP1467142 B1 EP 1467142B1
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EP
European Patent Office
Prior art keywords
light
fins
ground
temperature
air
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.)
Expired - Lifetime
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EP04356021A
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German (de)
French (fr)
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EP1467142A1 (en
Inventor
Philippe Mas
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Ludec
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Ludec
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Classifications

    • 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
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/773—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-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
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/022—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a floor or like ground surface, e.g. pavement or false floor
    • 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
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/107—Outdoor lighting of the exterior of buildings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/109—Outdoor lighting of gardens

Definitions

  • the present invention relates, in general, to the technical field of lighting devices and, more specifically, to recessed floor luminaires, especially on sidewalks, squares, halls, etc., for the purpose of lighting places. public or private, especially in an outdoor environment but also inside buildings. More particularly, this invention relates to a recessed floor luminaire with temperature reduction system.
  • recessed floor luminaires are currently composed of a cylindrical or square-shaped barrel or tank, and a reservation pot.
  • the reservation pot sealed in the ground, allows easy maintenance of the luminaire, since it can be extracted for a possible maintenance, for example for a replacement of socket or verrine.
  • the interior of a recessed luminaire in the floor is subject to significant heating due to the heat generated by the lamp, usually a metal iodide lamp, and because the luminaire is closed at the top. by a thick glass plate, flush with the ground.
  • the temperature inside the luminaire is even higher, and may be 40 ° C higher than the temperature observed for a luminaire built directly into the ground.
  • This difference in temperature is mainly due to the insulating air mattress, trapped between the tank of the luminaire itself, and the tank constituting the reservation pot.
  • the temperature, measured in the middle of the luminaire closing window, on the outer face thereof can become excessively high, in particular higher than the maximum recommended temperature of 75 ° C., with the consequent risk of burns for people who come in direct contact with this window.
  • Some improvements aimed at reducing the temperature of such recessed luminaires, can be made by reducing the thickness of the air mattress trapped between the two tanks, or by choosing, for the manufacture of these tanks, materials other than the stainless steel usually used, in order to increase the heat dissipation, but the results thus obtained remain very limited.
  • the interior volume of recessed floor luminaires is ventilated through a communication with the outside, the heat being evacuated through holes provided in the upper part of these luminaires, so at ground level.
  • Such a solution is inappropriate, especially in outdoor environments, because of the unavoidable inflow of rainwater, moisture and various dirt inside the luminaires, through the ventilation holes.
  • these holes can be quickly clogged with dirt or debris, including also when used in outdoor environments, which makes the ventilation system ineffective.
  • the present invention aims to avoid all of the disadvantages mentioned above, by providing a recessed floor luminaire and provided with a particularly effective temperature reduction system, in particular adapted to a fixture placed in a reservation pot, and not requiring no communication opening between the interior volume of the luminaire and the outside, therefore waterproof and moisture-proof.
  • the subject of the invention is a recessed floor luminaire, of the kind composed of a reservation pot intended to be sealed in the ground, and of a luminaire body removably placed inside the pot. of reservation, the luminaire body enclosing a lamp and a reflector, an intermediate space filled with air being provided between the reservation pot and the luminaire body, and the assembly being closed at its upper part by a window,
  • this luminaire recessed floor being essentially characterized by the fact that the reservation pot has, on its side wall, substantially vertical fins protruding inside the intermediate space filled with air, while the luminaire body comprises, on its lateral surface, substantially vertical external fins also protruding inside the air-filled intermediate space, the outer fins of the luminaire body interposing between the inner fins of the reservation pot, and these fins being distributed over the entire periphery of the luminaire, so as to constitute a temperature reduction system, in particular at the closing window.
  • the reservation pot comprises, on its side wall, on the one hand the aforementioned substantially vertical fins protruding inside the intermediate space filled with air, and on the other hand part of the substantially vertical fins protruding outwards.
  • the various aforementioned fins extend over substantially the entire height of the reservation pot, and the portion of the luminaire body surrounded by the reservation pot.
  • the bottom of the luminaire body may further comprise other fins, for example arranged parallel to each other, projecting under this bottom.
  • the idea underlying the present invention is to take advantage of the intermediate space filled with air, located between the reservation pot and the body of the luminaire, by providing in this intermediate space fins, made to the ribs, which maximize the distribution and heat exchange surfaces.
  • These fins arranged on the periphery of the lighting apparatus, practically all along its height, as well as at the level of the bottom of the apparatus, will make it possible to evacuate to the outside the heat released inside the this device, as soon as the luminaire is switched on.
  • the "outer" fins of the luminaire body, interposed between the "inner” ribs of the reservation pot will transmit to the latter the heat from inside the luminaire body, and this heat can then be communicated in the environment through the "outer" fins of the reservation pot.
  • the solution proposed by the invention does not involve any communication with the outside through holes or openings, which have the disadvantages previously exposed, so that the luminaire, object of the present invention, is completely waterproof and moisture, and thus meets the IPx7 standard protection index, namely "temporarily waterproof immersible".
  • the temperature reduction system of the ground recessed luminaire, object of the invention also comprises a fan placed in the lower part of the body of luminaire, and creating during operation, inside the luminaire body, a flow of air.
  • the fan thus makes it possible to homogenize the temperatures, between the closing window of the luminaire and the region of the bottom of the luminaire body, until reaching an intermediate value.
  • the action of this fan combines here advantageously with the effect of the fins, which realize the exchange of heat with the reservation pot and from there with the outside, since thanks to this thermal exchange the temperature in the lower part of the Luminaire body is lowered, which has the consequence (also thanks to the aforementioned air flow) to further reduce the temperature in the center of the closing glass.
  • the improvement of the temperature reduction is here obtained by a purely internal air circulation, thus without creating undesirable openings of communication with the outside, and this by means of a small fan, compact and low power, placed in the lower part of the luminaire body where it has the necessary space and also the power required for the motor of the fan.
  • the luminaire shown in Figure 1, is intended to be embedded in the ground, represented very summarily by its surface 2.
  • This luminaire is generally composed of a ground-sealed reservation pot 3 and a luminaire body 4 removably placed inside the reservation pot 3.
  • the reservation pot 3 and the luminaire body 4 have substantially cylindrical, coaxial shapes.
  • the assembly is closed, at its upper part, by a thick closing window 5, flush with the ground 2.
  • the interior of the luminaire body 4 forms a main chamber, in which are placed a lamp 6 and a reflector 7, which make it possible to create a more or less open or focused light beam, directed upwards and realizing and a lighting of the external environment, through the closing glass 5.
  • the lamp 6 and the reflector 7 are mounted above a horizontal plate 8, placed inside the luminaire body 4, at a certain height above the base of this body 4.
  • the luminaire body 4 is delimited by a tank, itself formed of a side wall 9 and a bottom 10.
  • the temperature T1 in the center of this window 5 can thus rise to excessively high values, if no particular provision is made.
  • This rise in temperature is due in particular to the presence of an insulating "air mattress" in the annular space 11 delimited between the reservation pot 3 and the side wall 9 of the luminaire body 4.
  • the recessed floor luminaire here described, is provided with a system that aims to reduce the temperature T1 in the center of the closing glass 5, by homogenizing the temperatures and removing heat.
  • the reservation pot 3 comprises, on the one hand, vertical outer fins 12, formed over its entire circumference, and practically over its entire height, at regular angular intervals, in radial directions (see in particular FIG. Figure 2).
  • the reservation pot 3 comprises vertical inner fins 13, also formed over its entire circumference, and practically over its entire height, at regular angular intervals, in radial directions.
  • the inner fins 13 of the reservation pot 3 take up space annular 11 filled with air, delimited between the reservation pot 3 and the side wall 9 of the luminaire body 4.
  • its side wall 9 has vertical outer fins 14, formed over its entire circumference in radial directions, over a height which corresponds at least to that of its part surrounded by the reservation pot 3
  • the outer fins 14 of the luminaire body 4 are the same number as the inner fins 13 of the reservation pot 3, and they are separated by the same angular intervals.
  • these fins 14 are interposed between the inner fins 13 of the reservation pot 3, in the annular space 11 filled with air delimited between the reservation pot 3 and the side wall. 9 of the luminaire body 4.
  • the temperature reduction system further comprises a small fan 16, placed in the lower part of the luminaire body 4, more particularly in a chamber 17 located under the plate 8 which serves to support the reflector 7
  • An air outlet passage 18 is formed in the plate 8, above the location of the fan 16.
  • Another air inlet passage 19 is formed in the same plate 8, opposite the passage 18 of air outlet.
  • the plate 8 also supports a deflector 20, which extends obliquely upwardly above the air outlet passageway 18 between this passage 18 and the reflector 7.
  • the recessed floor luminaire comprises electrical supply means, not shown, which provide the necessary power on the one hand to the lamp 6, and on the other hand to the fan 16.
  • the outer fins 14 of the luminaire body 4 and the inner fins 13 of the reservation pot 3 allow the transfer of heat, generated inside this luminaire body 4, towards the reservation pot 3.
  • the outer fins 12 of this reservation pot 3 ensure, as for them, the evacuation of the heat towards the ground 2, in which they are drowned.
  • the operation of the fan 16 creates, inside the luminaire body 4, a circulation of air in closed circuit, indicated by the arrows of FIG. 1.
  • the air is sucked towards the chamber 17 of the part bottom of the luminaire body 4 through the passage 19 of air inlet, and it is discharged by the fan 16 through the passage 18 air outlet.
  • the forced air is necessarily directed towards the upper part of the luminaire body 4, where it heats up in contact with the closing glass 5, before returning to the lower part to be sucked through the passage
  • the fan 16 and the internal air circulation created by it ensure homogenization of temperatures, in the luminaire body 4, in particular between the temperature T1 in the center of the closing glass 5, on the one hand, and the temperature T2 in the lower part of the luminaire body 4, on the other hand.
  • This temperature T2, lower than the temperature T1 is itself lowered by the heat dissipation achieved through the fins 12, 13 and 14, as described above.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The light has a reservation pot (3) including vertical blades (13) passing through interior of a circular space (11) filled with air. A lighting body (4) has exterior vertical blades (14) that pass through interior of the space and are inserted between the blades (13). The blades (13, 14) are distributed all around the periphery of the light to form a temperature reduction system at a level of a closing sheet (5). The circular space is defined between the reservation pot and a lateral wall (9) of the light body.

Description

La présente invention se rapporte, de façon générale, au domaine technique des appareils d'éclairage et, plus précisément, aux luminaires encastrés au sol, notamment sur des trottoirs, places, halls, etc... en vue de l'éclairage de lieux publics ou privés, notamment en milieu extérieur mais aussi à l'intérieur de bâtiments. Plus particulièrement, cette invention concerne un luminaire encastré au sol avec système de réduction des températures.The present invention relates, in general, to the technical field of lighting devices and, more specifically, to recessed floor luminaires, especially on sidewalks, squares, halls, etc., for the purpose of lighting places. public or private, especially in an outdoor environment but also inside buildings. More particularly, this invention relates to a recessed floor luminaire with temperature reduction system.

La plupart des luminaires encastrés au sol sont actuellement composés d'un fût ou cuve cylindrique, ou prismatique à base carrée, et d'un pot de réservation. Le pot de réservation, scellé dans le sol, permet une maintenance aisée du luminaire, puisque celui-ci peut en être extrait pour un entretien éventuel, par exemple pour un remplacement de douille ou de verrine.Most recessed floor luminaires are currently composed of a cylindrical or square-shaped barrel or tank, and a reservation pot. The reservation pot, sealed in the ground, allows easy maintenance of the luminaire, since it can be extracted for a possible maintenance, for example for a replacement of socket or verrine.

L'intérieur d'un luminaire encastré dans le sol est le siège d'un échauffement important, en raison de la chaleur dégagée par la lampe, en général une lampe à iodure métallique, et du fait que le luminaire est fermé à sa partie supérieure par une plaque de verre de forte épaisseur, affleurant le sol.The interior of a recessed luminaire in the floor is subject to significant heating due to the heat generated by the lamp, usually a metal iodide lamp, and because the luminaire is closed at the top. by a thick glass plate, flush with the ground.

Dans le cas d'un luminaire placé dans un pot de réservation, la température à l'intérieur du luminaire est encore plus élevée, et peut être de 40°C supérieure à la température observée pour un luminaire encastré directement dans le sol. Cette différence de température est principalement due au matelas d'air isolant, emprisonné entre la cuve du luminaire proprement dit, et la cuve constituant le pot de réservation. Il en résulte que la température, mesurée au milieu de la vitre de fermeture du luminaire, sur la face extérieure de celle-ci, peut devenir excessivement élevée, en particulier supérieure à la température maximale conseillée de 75°C, avec pour conséquence des risques de brûlures pour des personnes qui viendraient directement en contact avec cette vitre. Le risque d'atteindre, au centre de la vitre de fermeture, des températures excessives très supérieures à 75°C, existe en particulier lorsque l'appareil est équipé d'une lampe puissante, par exemple une lampe de 150 watts, à iodure métallique, associée à un réflecteur renvoyant vers cette vitre un faisceau lumineux très étroit ou très concentré, par exemple avec un angle d'ouverture de l'ordre de 10°.In the case of a luminaire placed in a reservation pot, the temperature inside the luminaire is even higher, and may be 40 ° C higher than the temperature observed for a luminaire built directly into the ground. This difference in temperature is mainly due to the insulating air mattress, trapped between the tank of the luminaire itself, and the tank constituting the reservation pot. As a result, the temperature, measured in the middle of the luminaire closing window, on the outer face thereof, can become excessively high, in particular higher than the maximum recommended temperature of 75 ° C., with the consequent risk of burns for people who come in direct contact with this window. There is a risk of excessive temperatures exceeding 75 ° C in the center of the closing glass, especially when the instrument is equipped with a powerful lamp, eg a 150 watt metal iodide lamp. , associated with a reflector returning to this window a very narrow or very concentrated light beam, for example with an opening angle of the order of 10 °.

Quelques améliorations, visant à réduire la température de tels luminaires encastrés, peuvent être apportées en réduisant l'épaisseur du matelas d'air emprisonné entre les deux cuves, ou bien en choisissant, pour la fabrication de ces cuves, des matériaux autres que l'acier inoxydable habituellement utilisé, afin d'augmenter au mieux la dissipation de la chaleur, mais les résultats ainsi obtenus restent très limités.Some improvements, aimed at reducing the temperature of such recessed luminaires, can be made by reducing the thickness of the air mattress trapped between the two tanks, or by choosing, for the manufacture of these tanks, materials other than the stainless steel usually used, in order to increase the heat dissipation, but the results thus obtained remain very limited.

Selon une autre proposition, indiquée dans les demandes de brevets français 2 711 222 et 2 755 212 , le volume intérieur de luminaires encastrés au sol est ventilé grâce à une mise en communication avec l'extérieur, la chaleur étant évacuée par des trous prévus dans la partie supérieure de ces luminaires, donc au niveau du sol. Une telle solution est inappropriée, notamment dans les utilisations en milieu extérieur, en raison des inévitables entrées d'eaux de pluie, d'humidité et de saletés diverses à l'intérieur des luminaires, par les trous de ventilation. De plus, ces trous risquent d'être rapidement colmatés par des saletés ou débris, notamment là aussi en cas d'utilisation en milieu extérieur, ce qui rend alors le système de ventilation inefficace.According to another proposal, indicated in the requests for French patents 2,711,222 and 2,755,212 , the interior volume of recessed floor luminaires is ventilated through a communication with the outside, the heat being evacuated through holes provided in the upper part of these luminaires, so at ground level. Such a solution is inappropriate, especially in outdoor environments, because of the unavoidable inflow of rainwater, moisture and various dirt inside the luminaires, through the ventilation holes. In addition, these holes can be quickly clogged with dirt or debris, including also when used in outdoor environments, which makes the ventilation system ineffective.

La présente invention vise à éviter l'ensemble des inconvénients précédemment exposés, en fournissant un luminaire encastré au sol et pourvu d'un système de réduction de température particulièrement efficace, en particulier adapté à un luminaire placé dans un pot de réservation, et ne nécessitant aucune ouverture de communication entre le volume intérieur du luminaire et l'extérieur, donc étanche à l'eau et à l'humidité.The present invention aims to avoid all of the disadvantages mentioned above, by providing a recessed floor luminaire and provided with a particularly effective temperature reduction system, in particular adapted to a fixture placed in a reservation pot, and not requiring no communication opening between the interior volume of the luminaire and the outside, therefore waterproof and moisture-proof.

A cet effet, l'invention a pour objet un luminaire encastré au sol, du genre composé d'un pot de réservation prévu pour être scellé dans le sol, et d'un corps de luminaire placé de manière amovible à l'intérieur du pot de réservation, le corps de luminaire renfermant une lampe et un réflecteur, un espace intermédiaire rempli d'air étant ménagé entre le pot de réservation et le corps de luminaire, et l'ensemble étant fermé à sa partie supérieure par une vitre, ce luminaire encastré au sol étant caractérisé essentiellement par le fait que le pot de réservation comporte, sur sa paroi latérale, des ailettes sensiblement verticales dépassant à l'intérieur de l'espace intermédiaire rempli d'air, tandis que le corps de luminaire comporte, sur sa surface latérale, des ailettes extérieures sensiblement verticales dépassant elles aussi à l'intérieur de l'espace intermédiaire rempli d'air, les ailettes extérieures du corps de luminaire s'intercalant entre les ailettes intérieures du pot de réservation, et ces ailettes étant réparties sur toute la périphérie du luminaire, de manière à constituer un système de réduction de température, notamment au niveau de la vitre de fermeture.For this purpose, the subject of the invention is a recessed floor luminaire, of the kind composed of a reservation pot intended to be sealed in the ground, and of a luminaire body removably placed inside the pot. of reservation, the luminaire body enclosing a lamp and a reflector, an intermediate space filled with air being provided between the reservation pot and the luminaire body, and the assembly being closed at its upper part by a window, this luminaire recessed floor being essentially characterized by the fact that the reservation pot has, on its side wall, substantially vertical fins protruding inside the intermediate space filled with air, while the luminaire body comprises, on its lateral surface, substantially vertical external fins also protruding inside the air-filled intermediate space, the outer fins of the luminaire body interposing between the inner fins of the reservation pot, and these fins being distributed over the entire periphery of the luminaire, so as to constitute a temperature reduction system, in particular at the closing window.

Dans une forme de réalisation préférée de l'invention, le pot de réservation comporte, sur sa paroi latérale, d'une part les ailettes sensiblement verticales précitées dépassant à l'intérieur de l'espace intermédiaire rempli d'air, et d'autre part des ailettes sensiblement verticales dépassant vers l'extérieur.In a preferred embodiment of the invention, the reservation pot comprises, on its side wall, on the one hand the aforementioned substantially vertical fins protruding inside the intermediate space filled with air, and on the other hand part of the substantially vertical fins protruding outwards.

Avantageusement, les diverses ailettes précitées s'étendent sur sensiblement toute la hauteur du pot de réservation, et de la partie du corps de luminaire entourée par le pot de réservation.Advantageously, the various aforementioned fins extend over substantially the entire height of the reservation pot, and the portion of the luminaire body surrounded by the reservation pot.

Le fond du corps de luminaire peut comporter encore d'autres ailettes, par exemple disposées parallèlement les unes aux autres, faisant saillie sous ce fond.The bottom of the luminaire body may further comprise other fins, for example arranged parallel to each other, projecting under this bottom.

Ainsi, l'idée à la base de la présente invention consiste à mettre à profit l'espace intermédiaire rempli d'air, situé entre le pot de réservation et le corps du luminaire, en disposant dans cet espace intermédiaire des ailettes, réalisées à la manière de nervures, qui augmentent au maximum les surfaces de répartition et d'échange thermique. Ces ailettes, disposées sur le pourtour de l'appareil d'éclairage, pratiquement sur toute sa hauteur, ainsi qu'au niveau du fond de l'appareil, vont permettre d'évacuer vers l'extérieur la chaleur dégagée à l'intérieur de cet appareil, dès la mise en marche du luminaire. En particulier, les ailettes "extérieures" du corps de luminaire, intercalées entre les nervures "intérieures" du pot de réservation, vont transmettre à ces dernières la chaleur en provenance de l'intérieur du corps de luminaire, et cette chaleur pourra alors être communiquée au milieu ambiant par l'intermédiaire des ailettes "extérieures" du pot de réservation.Thus, the idea underlying the present invention is to take advantage of the intermediate space filled with air, located between the reservation pot and the body of the luminaire, by providing in this intermediate space fins, made to the ribs, which maximize the distribution and heat exchange surfaces. These fins, arranged on the periphery of the lighting apparatus, practically all along its height, as well as at the level of the bottom of the apparatus, will make it possible to evacuate to the outside the heat released inside the this device, as soon as the luminaire is switched on. In particular, the "outer" fins of the luminaire body, interposed between the "inner" ribs of the reservation pot, will transmit to the latter the heat from inside the luminaire body, and this heat can then be communicated in the environment through the "outer" fins of the reservation pot.

On obtient ainsi une réduction effective et sensible de la température, notamment au niveau de la vitre de fermeture, sur laquelle la température maximale souhaitée de 75°C pourra être effectivement respectée, même dans le cas d'un luminaire encastré à lampe puissante et faisceau concentré, et ceci par une solution technique simple, économique et offrant toute commodité et sécurité. En particulier, les différentes ailettes sont obtenues directement de fonderie, lors de la fabrication du pot de réservation et de la cuve du luminaire proprement dit, qui pour le reste ne sont pas modifiés. L'imbrication des ailettes verticales, sans contact direct, permet toujours l'extraction du corps de luminaire pour les opérations de maintenance. Par ailleurs, la solution proposée par l'invention n'implique aucune communication avec l'extérieur par des trous ou ouvertures, qui présentent les inconvénients précédemment exposés, de sorte que le luminaire, objet de la présente invention, est totalement étanche à l'eau et à l'humidité, et répond ainsi à l'indice de protection normalisé IPx7, à savoir "étanche immergeable temporairement".This results in an effective and substantial reduction of the temperature, especially at the closing window, on which the desired maximum temperature of 75 ° C can be effectively met, even in the case of a recessed luminaire with a powerful lamp and beam concentrated, and this by a simple technical solution, economical and offering all convenience and security. In particular, the different fins are obtained directly from the foundry, during the manufacture of the reservation pot and the tank of the luminaire itself, which for the rest are not modified. The nesting of vertical fins, without direct contact, always allows the extraction of the luminaire body for maintenance operations. Furthermore, the solution proposed by the invention does not involve any communication with the outside through holes or openings, which have the disadvantages previously exposed, so that the luminaire, object of the present invention, is completely waterproof and moisture, and thus meets the IPx7 standard protection index, namely "temporarily waterproof immersible".

A titre complémentaire, dans le cas où la valeur limite de température fixée risquerait d'être dépassée, le système de réduction de température du luminaire encastré au sol, objet de l'invention, comprend aussi un ventilateur placé dans la partie inférieure du corps de luminaire, et créant en cours de fonctionnement, à l'intérieur du corps de luminaire, une circulation d'air. Le ventilateur permet ainsi d'homogénéiser les températures, entre la vitre de fermeture du luminaire et la région du fond du corps de luminaire, jusqu'à arriver à une valeur intermédiaire. L'action de ce ventilateur se combine ici avantageusement avec l'effet des ailettes, qui réalisent l'échange de chaleur avec le pot de réservation et de là avec l'extérieur, puisque grâce à cet échange thermique la température dans la partie inférieure du corps de luminaire est abaissée, ce qui a pour conséquence (grâce aussi à la circulation d'air précitée) de réduire d'autant plus la température au centre de la vitre de fermeture. Enfin, on notera que l'amélioration de la réduction de température est ici obtenue par une circulation d'air purement interne, donc sans créer d'ouvertures non souhaitables de communication avec l'extérieur, et ceci au moyen d'un petit ventilateur, peu encombrant et de faible puissance, placé dans la partie inférieure du corps de luminaire où l'on dispose de la place nécessaire et aussi de l'alimentation électrique nécessaire au moteur de ce ventilateur.In addition, in the case where the set temperature limit value could be exceeded, the temperature reduction system of the ground recessed luminaire, object of the invention, also comprises a fan placed in the lower part of the body of luminaire, and creating during operation, inside the luminaire body, a flow of air. The fan thus makes it possible to homogenize the temperatures, between the closing window of the luminaire and the region of the bottom of the luminaire body, until reaching an intermediate value. The action of this fan combines here advantageously with the effect of the fins, which realize the exchange of heat with the reservation pot and from there with the outside, since thanks to this thermal exchange the temperature in the lower part of the Luminaire body is lowered, which has the consequence (also thanks to the aforementioned air flow) to further reduce the temperature in the center of the closing glass. Finally, it will be noted that the improvement of the temperature reduction is here obtained by a purely internal air circulation, thus without creating undesirable openings of communication with the outside, and this by means of a small fan, compact and low power, placed in the lower part of the luminaire body where it has the necessary space and also the power required for the motor of the fan.

L'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme d'exécution de ce luminaire encastré au sol, avec système de réduction de température :

  • Figure 1 est une vue d'ensemble, en coupe verticale, d'un luminaire conforme à la présente invention ;
  • Figure 2 est une vue en coupe horizontale de ce luminaire, suivant II-II de figure 1 ;
  • Figure 3 en est une vue par dessous, suivant la flèche F de figure 1.
The invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing showing, by way of example, one embodiment of this recessed floor luminaire, with a temperature reduction system:
  • Figure 1 is an overall view, in vertical section, of a luminaire according to the present invention;
  • Figure 2 is a horizontal sectional view of this luminaire, along II-II of Figure 1;
  • Figure 3 is a view from below, along the arrow F of Figure 1.

Le luminaire, représenté sur la figure 1, est prévu pour être encastré dans le sol, représenté très sommairement par sa surface 2. Ce luminaire se compose, d'une manière générale, d'un pot de réservation 3 scellé dans le sol 2, et d'un corps de luminaire 4 placé de manière amovible à l'intérieur du pot de réservation 3. Dans l'exemple illustré au dessin, le pot de réservation 3 et le corps de luminaire 4 possèdent des formes sensiblement cylindriques, coaxiales. L'ensemble est fermé, à sa partie supérieure, par une vitre de fermeture 5 épaisse, affleurant le sol 2.The luminaire, shown in Figure 1, is intended to be embedded in the ground, represented very summarily by its surface 2. This luminaire is generally composed of a ground-sealed reservation pot 3 and a luminaire body 4 removably placed inside the reservation pot 3. In the illustrated example in the drawing, the reservation pot 3 and the luminaire body 4 have substantially cylindrical, coaxial shapes. The assembly is closed, at its upper part, by a thick closing window 5, flush with the ground 2.

De façon généralement connue, l'intérieur du corps de luminaire 4 forme une chambre principale, dans laquelle sont placés une lampe 6 et un réflecteur 7, qui permettent de créer un faisceau lumineux plus ou moins ouvert ou concentré, dirigé vers le haut et réalisant ainsi un éclairage du milieu extérieur, au travers de la vitre de fermeture 5. La lampe 6 et le réflecteur 7 sont montés au-dessus d'une platine horizontale 8, placée à l'intérieur du corps de luminaire 4, à une certaine hauteur au-dessus de la base de ce corps 4.In a generally known manner, the interior of the luminaire body 4 forms a main chamber, in which are placed a lamp 6 and a reflector 7, which make it possible to create a more or less open or focused light beam, directed upwards and realizing and a lighting of the external environment, through the closing glass 5. The lamp 6 and the reflector 7 are mounted above a horizontal plate 8, placed inside the luminaire body 4, at a certain height above the base of this body 4.

Le corps de luminaire 4 est délimité par une cuve, elle-même formée d'une paroi latérale 9 et d'un fond 10.The luminaire body 4 is delimited by a tank, itself formed of a side wall 9 and a bottom 10.

Lorsque la lampe 6, qui est notamment une lampe à iodure métallique, est éclairée, et notamment si le faisceau lumineux renvoyé par le réflecteur 7 est étroit ou concentré, on observe un échauffement de la vitre de fermeture 5, la température T1 au centre de cette vitre 5 pouvant ainsi s'élever jusqu'à des valeurs excessivement hautes, si aucune disposition particulière n'est prise. Cette élévation de température est due notamment à la présence d'un "matelas d'air" isolant, dans l'espace annulaire 11 délimité entre le pot de réservation 3 et la paroi latérale 9 du corps de luminaire 4.When the lamp 6, which is in particular a metal halide lamp, is illuminated, and especially if the light beam reflected by the reflector 7 is narrow or concentrated, there is a heating of the closing glass 5, the temperature T1 in the center of this window 5 can thus rise to excessively high values, if no particular provision is made. This rise in temperature is due in particular to the presence of an insulating "air mattress" in the annular space 11 delimited between the reservation pot 3 and the side wall 9 of the luminaire body 4.

Le luminaire encastré au sol, ici décrit, est pourvu d'un système qui vise à réduire la température T1 au centre de la vitre de fermeture 5, par homogénéisation des températures et évacuation de la chaleur.The recessed floor luminaire, here described, is provided with a system that aims to reduce the temperature T1 in the center of the closing glass 5, by homogenizing the temperatures and removing heat.

A cet effet, le pot de réservation 3 comporte, d'une part, des ailettes verticales 12 extérieures, formées sur toute sa circonférence, et pratiquement sur toute sa hauteur, à des intervalles angulaires réguliers, suivant des directions radiales (voir en particulier la figure 2).For this purpose, the reservation pot 3 comprises, on the one hand, vertical outer fins 12, formed over its entire circumference, and practically over its entire height, at regular angular intervals, in radial directions (see in particular FIG. Figure 2).

Le pot de réservation 3 comporte, d'autre part, des ailettes verticales 13 intérieures, formées elles aussi sur toute sa circonférence, et pratiquement sur toute sa hauteur, à des intervalles angulaires réguliers, suivant des directions radiales. Lorsque le corps de luminaire 4 est en place, les ailettes intérieures 13 du pot de réservation 3 prennent place dans l'espace annulaire 11 rempli d'air, délimité entre le pot de réservation 3 et la paroi latérale 9 du corps de luminaire 4.On the other hand, the reservation pot 3 comprises vertical inner fins 13, also formed over its entire circumference, and practically over its entire height, at regular angular intervals, in radial directions. When the luminaire body 4 is in place, the inner fins 13 of the reservation pot 3 take up space annular 11 filled with air, delimited between the reservation pot 3 and the side wall 9 of the luminaire body 4.

En ce qui concerne le corps de luminaire 4, sa paroi latérale 9 comporte des ailettes verticales 14 extérieures, formées sur toute sa circonférence suivant des directions radiales, sur une hauteur qui correspond au moins à celle de sa partie entourée par le pot de réservation 3. Les ailettes extérieures 14 du corps de luminaire 4 sont en même nombre que les ailettes intérieures 13 du pot de réservation 3, et elles sont séparées par les mêmes intervalles angulaires.As regards the luminaire body 4, its side wall 9 has vertical outer fins 14, formed over its entire circumference in radial directions, over a height which corresponds at least to that of its part surrounded by the reservation pot 3 The outer fins 14 of the luminaire body 4 are the same number as the inner fins 13 of the reservation pot 3, and they are separated by the same angular intervals.

Ainsi, lorsque le corps de luminaire 4 est en place, ces ailettes 14 s'intercalent entre les ailettes intérieures 13 du pot de réservation 3, dans l'espace annulaire 11 rempli d'air délimité entre le pot de réservation 3 et la paroi latérale 9 du corps de luminaire 4.Thus, when the luminaire body 4 is in place, these fins 14 are interposed between the inner fins 13 of the reservation pot 3, in the annular space 11 filled with air delimited between the reservation pot 3 and the side wall. 9 of the luminaire body 4.

Sous le fond 10 du corps de luminaire 4 sont formées d'autres ailettes 15, disposées parallèlement les unes aux autres dans des plans verticaux, comme le montre plus particulièrement la figure 3.Under the bottom 10 of the luminaire body 4 are formed other fins 15, arranged parallel to each other in vertical planes, as shown more particularly in Figure 3.

Dans l'exemple illustré au dessin, le système de réduction de température comprend encore un petit ventilateur 16, placé dans la partie inférieure du corps de luminaire 4, plus particulièrement dans une chambre 17 située sous la platine 8 qui sert de support au réflecteur 7. Un passage 18 de sortie d'air est ménagé dans la platine 8, au-dessus de l'emplacement du ventilateur 16. Un autre passage 19 d'entrée d'air est ménagé dans la même platine 8, à l'opposé du passage 18 de sortie d'air.In the example illustrated in the drawing, the temperature reduction system further comprises a small fan 16, placed in the lower part of the luminaire body 4, more particularly in a chamber 17 located under the plate 8 which serves to support the reflector 7 An air outlet passage 18 is formed in the plate 8, above the location of the fan 16. Another air inlet passage 19 is formed in the same plate 8, opposite the passage 18 of air outlet.

La platine 8 supporte encore un déflecteur 20, qui s'étend en oblique, vers le haut, au-dessus du passage 18 de sortie d'air, entre ce passage 18 et le réflecteur 7.The plate 8 also supports a deflector 20, which extends obliquely upwardly above the air outlet passageway 18 between this passage 18 and the reflector 7.

Enfin, le luminaire encastré au sol comprend des moyens d'alimentation électrique, non représentés, qui fournissent la puissance nécessaire d'une part à la lampe 6, et d'autre part au ventilateur 16.Finally, the recessed floor luminaire comprises electrical supply means, not shown, which provide the necessary power on the one hand to the lamp 6, and on the other hand to the fan 16.

Le fonctionnement du système de réduction de température de ce luminaire encastré au sol est le suivant :The operation of the temperature reduction system of this recessed floor luminaire is as follows:

Au niveau de l'espace annulaire 11, délimité entre le pot de réservation 3 et le corps de luminaire 4, les ailettes extérieures 14 du corps de luminaire 4 et les ailettes intérieures 13 du pot de réservation 3 permettent le transfert de la chaleur, engendrée à l'intérieur de ce corps de luminaire 4, vers le pot de réservation 3. Les ailettes extérieures 12 de ce pot de réservation 3 assurent, quant à elles, l'évacuation de la chaleur vers le sol 2, dans lequel elles sont noyées.At the level of the annular space 11, delimited between the reservation pot 3 and the luminaire body 4, the outer fins 14 of the luminaire body 4 and the inner fins 13 of the reservation pot 3 allow the transfer of heat, generated inside this luminaire body 4, towards the reservation pot 3. The outer fins 12 of this reservation pot 3 ensure, as for them, the evacuation of the heat towards the ground 2, in which they are drowned.

De plus, le fonctionnement du ventilateur 16 crée, à l'intérieur du corps de luminaire 4, une circulation d'air en circuit fermé, indiquée par les flèches de la figure 1. L'air est aspiré vers la chambre 17 de la partie inférieure du corps de luminaire 4 par le passage 19 d'entrée d'air, et il est refoulé par le ventilateur 16 au travers du passage 18 de sortie d'air. Grâce au déflecteur 20, l'air refoulé est dirigé nécessairement vers la partie supérieure du corps de luminaire 4, où il s'échauffe au contact de la vitre de fermeture 5, avant de revenir vers la partie inférieure pour être réaspiré au travers du passage d'entrée 19. Ainsi, le ventilateur 16 et la circulation d'air interne créée par celui-ci assurent une homogénéisation de températures, dans le corps de luminaire 4, notamment entre la température T1 au centre de la vitre de fermeture 5, d'une part, et la température T2 dans la partie inférieure du corps de luminaire 4, d'autre part. Cette température T2, inférieure à la température T1, est elle-même abaissée par l'évacuation de chaleur réalisée grâce aux ailettes 12, 13 et 14, comme décrit précédemment.In addition, the operation of the fan 16 creates, inside the luminaire body 4, a circulation of air in closed circuit, indicated by the arrows of FIG. 1. The air is sucked towards the chamber 17 of the part bottom of the luminaire body 4 through the passage 19 of air inlet, and it is discharged by the fan 16 through the passage 18 air outlet. Thanks to the deflector 20, the forced air is necessarily directed towards the upper part of the luminaire body 4, where it heats up in contact with the closing glass 5, before returning to the lower part to be sucked through the passage In this way, the fan 16 and the internal air circulation created by it ensure homogenization of temperatures, in the luminaire body 4, in particular between the temperature T1 in the center of the closing glass 5, on the one hand, and the temperature T2 in the lower part of the luminaire body 4, on the other hand. This temperature T2, lower than the temperature T1, is itself lowered by the heat dissipation achieved through the fins 12, 13 and 14, as described above.

La combinaison des moyens précédemment décrits, à savoir les diverses ailettes 12, 13, 14, 15 et le ventilateur 16, permet de réduire dans tous les cas la température T1 au centre de la vitre de fermeture 5 jusqu'à un niveau acceptable, c'est-à-dire inférieur à 75°C.The combination of the means previously described, namely the various fins 12, 13, 14, 15 and the fan 16, reduces in any case the temperature T1 in the center of the closing glass 5 to an acceptable level, c that is, less than 75 ° C.

L'on ne s'éloignerait pas du cadre de l'invention, telle que définie dans les revendications annexées :

  • en modifiant le nombre, la forme et la dimension des ailettes, qui sont à déterminer dans chaque cas, en fonction de la construction générale de l'appareil d'éclairage et de la quantité de chaleur à évacuer ; en particulier, la hauteur et l'épaisseur de ces ailettes peuvent varier, de même que le détail de leur forme (parallélisme des faces ou dépouilles) qui est dicté par des nécessités de moulage ;
  • en appliquant le même système de réduction de température à des luminaires encastrés au sol de toutes configurations, en particulier de section horizontale autre que circulaire, et avec tout genre d'aménagement intérieur, en particulier en ce qui concerne le montage, fixe ou orientable, de la lampe et du réflecteur qui lui est associé.
One would not depart from the scope of the invention, as defined in the appended claims:
  • by modifying the number, shape and size of the fins, which are to be determined in each case, according to the general construction of the lighting apparatus and the amount of heat to be evacuated; in particular, the height and thickness of these fins may vary, as well as the detail of their shape (parallelism of the faces or bodies) which is dictated by molding requirements;
  • by applying the same system of temperature reduction to recessed floor luminaires of all configurations, in particular of horizontal section other than circular, and with any type of interior arrangement, in particular as regards the mounting, fixed or orientable, of the lamp and the reflector associated with it.

Claims (7)

  1. A light that can be embedded in the ground, of the type consisting of a holding receptacle (3) which is intended to be embedded in the ground (2) and a light body (4) which is removably placed inside the holding receptacle (3), the light body (4) enclosing a bulb (6) and a reflector (7), an air-filled intermediate space (11) being provided between the holding receptacle (3) and the light body (4), and the assembly being closed at its upper part by a closure pane (5), characterised in that the holding receptacle (3) comprises, on its side wall, substantially vertical fins (13) which protrude into the air-filled intermediate space (11), whereas the light body (4) comprises, on its lateral surface (9), substantially vertical external fins (14) which also protrude into the air-filled intermediate space (11), the external fins (14) of the light body (4) engaging between the internal fins (13) of the holding receptacle (3), and these fins (13, 14) being distributed around the entire periphery of the light so as to form a temperature-reducing system, in particular at the closure pane (5).
  2. A light that can be embedded in the ground with a temperature-reducing system according to claim 1, characterised in that the holding receptacle (3) comprises, on its side wall, on the one hand the aforementioned substantially vertical fins (13) which protrude into the air-filled intermediate space (11) and on the other hand substantially vertical fins (12) which protrude outwards.
  3. A light that can be embedded in the ground with a temperature-reducing system according to claim 1 or 2, characterised in that the various aforementioned fins (12, 13, 14) extend over substantially the entire height of the holding receptacle (3) and of the part of the light body (4) enclosed by the holding receptacle (3).
  4. A light that can be embedded in the ground with a temperature-reducing system according to any one of claims 1 to 3, characterised in that the bottom (10) of the light body (4) comprises other fins (15), for example arranged parallel to one another, which protrude below this bottom (10).
  5. A light that can be embedded in the ground with a temperature-reducing system according to any one of claims 1 to 4, characterised in that the temperature-reducing system also comprises a fan (16) placed in the lower part of the light body (4) and creating a flow of air inside the light body (4) during operation.
  6. A light that can be embedded in the ground with a temperature-reducing system according to claim 5, characterised in that the fan (16) is placed below a board (8) which serves as a support for the reflector (7) of the light, an air outlet passage (18) being provided in the board (8) above the location of the fan (16) and an air inlet passage (19) being provided in the board (8) opposite the air outlet passage (18).
  7. A light that can be embedded in the ground with a temperature-reducing system according to claim 6, characterised in that the board (8) supports a deflector (20) which extends obliquely upwards above the air outlet passage (18), between this passage (18) and the reflector (7).
EP04356021A 2003-04-07 2004-02-16 Luminaire recessed in the ground comprising a temperature reduction system Expired - Lifetime EP1467142B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0304291 2003-04-07
FR0304291A FR2853391B1 (en) 2003-04-07 2003-04-07 GROUND LUMINAIRE WITH TEMPERATURE REDUCTION SYSTEM

Publications (2)

Publication Number Publication Date
EP1467142A1 EP1467142A1 (en) 2004-10-13
EP1467142B1 true EP1467142B1 (en) 2007-12-26

Family

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EP04356021A Expired - Lifetime EP1467142B1 (en) 2003-04-07 2004-02-16 Luminaire recessed in the ground comprising a temperature reduction system

Country Status (5)

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EP (1) EP1467142B1 (en)
AT (1) ATE382137T1 (en)
DE (1) DE602004010861T2 (en)
ES (1) ES2295804T3 (en)
FR (1) FR2853391B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106949416B (en) * 2017-04-21 2023-05-12 广州市德晟光电科技股份有限公司 Waterproof heat dissipation stage lamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1970078U (en) * 1967-05-02 1967-10-12 Karl Storz LIGHT PROJECTOR WITH COOLING DEVICE.
DE8212424U1 (en) * 1982-04-30 1982-08-19 Herbert Waldmann GmbH & Co, 7730 Villingen-Schwenningen HALOGEN LAMP WITH HEAT PROTECTION
US4419716A (en) * 1983-01-03 1983-12-06 Stephen Koo Vapor proof housing assembly and system
FI80777C (en) * 1988-09-29 1990-07-10 Meltron Ab Oy ANORDNING VID BELYSNINGSARMATUR.
FR2711222B1 (en) 1993-10-11 1996-01-26 Commerc Realisa Mat Tole Et Box to be built into the ground to install a projector.
FR2755212B1 (en) 1996-10-31 1998-11-20 Herras Jamele LIGHT BOX LIGHTING OF A DECORATIVE IMAGE FOR SIDEWALKS

Also Published As

Publication number Publication date
FR2853391B1 (en) 2005-05-13
ES2295804T3 (en) 2008-04-16
DE602004010861T2 (en) 2008-12-18
ATE382137T1 (en) 2008-01-15
FR2853391A1 (en) 2004-10-08
DE602004010861D1 (en) 2008-02-07
EP1467142A1 (en) 2004-10-13

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