EP3995734A1 - Beleuchtungsvorrichtung und zugehöriges herstellungsverfahren - Google Patents

Beleuchtungsvorrichtung und zugehöriges herstellungsverfahren Download PDF

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Publication number
EP3995734A1
EP3995734A1 EP21206586.6A EP21206586A EP3995734A1 EP 3995734 A1 EP3995734 A1 EP 3995734A1 EP 21206586 A EP21206586 A EP 21206586A EP 3995734 A1 EP3995734 A1 EP 3995734A1
Authority
EP
European Patent Office
Prior art keywords
support
dissipator
containing body
light source
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21206586.6A
Other languages
English (en)
French (fr)
Inventor
Riccardo Gratton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CORTEM SpA
Original Assignee
CORTEM SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CORTEM SpA filed Critical CORTEM SpA
Publication of EP3995734A1 publication Critical patent/EP3995734A1/de
Pending legal-status Critical Current

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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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • 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
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/12—Flameproof or explosion-proof arrangements
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/013—Housings, e.g. material or assembling of housing parts the housing being an extrusion
    • 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
    • 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
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F21V3/0625—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics the material diffusing light, e.g. translucent plastics
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear 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

  • Embodiments described here concern a lighting apparatus used, preferably, but not exclusively, in areas and/or environments in which the formation of an explosive atmosphere, consisting of a mixture of air and flammable substances in the form of gas, vapors or mist, can occasionally occur during normal production activities.
  • an explosive atmosphere consisting of a mixture of air and flammable substances in the form of gas, vapors or mist
  • the present invention concerns both the composition and the production method of said apparatus.
  • Lighting apparatuses which comprise a containing body, provided with a housing, in which a light source is located and possibly a compartment in which a power supply and control unit is located.
  • the light source is suitable to generate a beam of light intended, for example, to illuminate an internal or external environment, or to provide an alarm signal associated with a malfunction of machinery inside a production plant.
  • Lighting apparatuses are known in which the containing body is made of metal material and, in addition to the mechanical function of accommodating the various electronic/mechanical components that make up the apparatus, it also performs a function of thermal dissipation of the heat generated by the light source and by the power supply and control unit.
  • the containing body is made in two or more pieces and of polymeric material.
  • the heat dissipation function is performed by a dissipation support of the light source made of metal material and mounted in correspondence with the housing.
  • the category of such apparatuses includes, for example, spotlights, projectors, illuminated fixtures and ceiling lights.
  • LED light sources are used, the main advantage of which lies above all in the long duration which, in addition to being advantageous in economic terms, brings with it the need for a lower number of maintenance interventions.
  • the light source is hermetically insulated from the external atmosphere, for example, it is completely covered, and then sealed, by means of a layer of transparent polymeric resin.
  • a first disadvantage of known explosion-proof lighting apparatuses whose components in contact with the external atmosphere are made of metal material is that it is not possible to install them in chemically aggressive environments against the metal material itself.
  • the polymeric resin is subject to degradation due to aging and, since it cannot be replaced, as time passes, it reduces the luminous efficiency of the apparatus.
  • a first purpose of the present invention is to provide an explosion-proof lighting apparatus that is suitable to be installed even in environments that are chemically aggressive toward metal materials exposed to the external environment.
  • Another purpose of the present invention is to not alter the light emission and the color rendering index of the light source.
  • Another purpose is that the luminous efficiency of the apparatus is high and constant throughout its entire usable life.
  • Another purpose is to perfect a method to produce a lighting apparatus that is simple, repeatable in series, efficient, rapid and with low implementation costs, which allows easier assembly operations, and which allows to obtain a long duration of the apparatus itself.
  • a final purpose of the present invention is to provide a lighting apparatus which, even by increasing its performance in terms of luminous efficiency and duration over time, has production costs that are no higher, or possibly lower, than those of the apparatuses belonging to the state of the art.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a lighting apparatus indicated hereafter as apparatus, which comprises a containing body, provided with two open ends, a dissipator support, which divides the containing body into a housing and a compartment, a light source attached to the dissipator support in correspondence with the housing, and two closing elements, both configured to close the open ends of the containing body.
  • the containing body is made in a single body and of polymeric material.
  • the housing and the compartment are hermetically sealed, with respect to the external environment, by means of the closing elements which are attached in correspondence with the open ends of the containing body.
  • the closing elements are made of polymeric material.
  • the housing and the compartment are hermetically sealed, with respect to the external environment, by means of the interposition of sealing elements made of a material with sealing properties between the open ends of the containing body and the closing elements.
  • the containing body comprises a containing portion and a diffusion portion, the latter being made of a transparent and/or translucent polymeric material.
  • the containing portion comprises inside it at least two upper protuberances and at least two lower protuberances.
  • Each upper protuberance faces the corresponding lower protuberance, so as to create a first cavity between them.
  • the first cavities are configured to accommodate and maintain in position the dissipator support.
  • the dissipator support comprises at least two first protuberances configured to be inserted inside the first cavities.
  • a sheet of glass is positioned in the housing, attached to the dissipator support, defining with the latter a chamber separated from the external environment, in which the light source is disposed.
  • the chamber is hermetically sealed by means of the sealing elements and sealing material applied along the entire periphery of the sheet of glass.
  • the dissipator support comprises two second protuberances configured to support the sheet of glass and to delimit the chamber.
  • Each second protuberance delimits a second cavity configured to position and possibly additionally prevent the displacement of the sealing material.
  • the dissipator support is configured to rest on the at least two upper protuberances and comprises at least one end portion configured to attach the dissipator support to the containing body by means of attachment means of the closing elements.
  • the present invention also concerns a method to produce a lighting apparatus which comprises the following steps:
  • the method to produce the lighting apparatus can also include the steps of:
  • the present apparatus 10 comprises a containing body 11 provided with two open ends, a dissipator support 22, at least one light source 16 and two closing elements 17, 18.
  • the closing elements 17, 18 are configured to close the open ends of the containing body 11.
  • the closing elements 17, 18 can be configured to be applied to the respective opposite ends of the containing body 11 by means of suitable attachment means 19 such as, for example, self-tapping screws.
  • the containing body 11, as well as the closing elements 17, 18, can be made of polymeric material.
  • the polymeric material can be selected from polycarbonate, polyester resin, epoxy resin, polyester resin reinforced with glass fibers, or suchlike, or combinations thereof.
  • the apparatus 10 can be used in all environments that are chemically aggressive toward metal materials. For example, it can be used in environments where corrosive substances such as nitric acid or pentane, or suchlike, are present.
  • the containing body 11 is made in a single body.
  • the containing body 11 can have horizontal sections, according to a horizontal plane Y, having at least two parallel opposite sides, for example in the shape of a parallelogram, rectangular, square or trapezoidal.
  • the containing body 11 also has a transverse section, according to a plane perpendicular to the horizontal plane Y, closed and empty inside, for example, shaped almost as an O, rectangular or square.
  • the containing body 11 is made by means of molding, extrusion or coextrusion, preferably by means of coextrusion, while the closing elements 17, 18 are made by means of molding.
  • the containing body 11 comprises a containing portion 11a and a diffusion portion 11b which are made in a single body, each made of polymeric material.
  • the diffusion portion 11b is disposed in the lower part of the containing body 11 facing the light source 16.
  • the diffusion portion 11b is configured to suitably diffuse the beam of light generated by the light source 16.
  • the diffusion portion 11b can eliminate the risk of glare and therefore considerably increase visual comfort.
  • the diffusion portion 11b is made of a transparent and/or translucent polymeric material such as, for example, polycarbonate ( figs. 3, 3a , 4 and 4a ).
  • the containing portion 11a can be made of an opaque polymeric material such as a polyester or epoxy resin, or a transparent and/or translucent material, such as polycarbonate.
  • the containing portion 11a and the diffusion portion 11b are each made of a transparent and/or translucent polymeric material, possibly of the same transparent and/or translucent polymeric material.
  • the external surface of the containing portion 11a and of the diffusion portion 11b can be smooth or rough to the touch, for example, it can be provided with grooves parallel to a longitudinal axis X of the apparatus 10.
  • the light source 16 can be any device whatsoever capable of converting the electrical power supplied by a power supply and control unit 14 into a beam of light such as, for example, incandescent, halogen, discharge, LED lights or suchlike.
  • the containing body 11 can be configured to accommodate the dissipator support 22 on which, in correspondence with a rest surface 22a thereof facing the diffusion portion 11b, the light source 16 is attached.
  • the rest portion 22a is parallel to the horizontal plane Y and extends along the longitudinal axis X of the apparatus 10.
  • the dissipator support 22 is configured to optimally disperse the heat generated by the light source 16.
  • the dissipator support 22 can be made of metal material, for example steel, aluminum or copper, preferably of aluminum alloy.
  • Metal materials in fact, have the advantage of having a good thermal conductivity, being able to dissipate the heat produced, for example, by the light source 16.
  • the aluminum alloy is also a light and corrosion resistant material.
  • the dissipator support 22 can be made by means of molding, die casting or extrusion, preferably by means of extrusion.
  • the containing portion 11a of the containing body 11 can comprise inside it at least two upper protuberances 27a and at least two lower protuberances 27b.
  • Each upper protuberance 27a faces the corresponding lower protuberance 27b, in such a way as to create a first cavity 27 between them.
  • the first cavity 27 has a development parallel to the longitudinal axis X of the containing body 11.
  • the first cavity 27 is also configured to accommodate and maintain in position the dissipator support 22.
  • the dissipator support 22 comprises at least two first protuberances 23.
  • the first protuberances 23 are configured to be inserted inside the respective first cavities 27.
  • the first protuberances 23 are configured to rest on the at least two upper protuberances 27a.
  • the dissipator support 22 can comprise at least one end portion 32 configured to attach the dissipator support 22 to the containing body 11 by means of attachment means 19 of the closing elements 17, 18.
  • the dissipator support 22 once mounted inside the containing body 11, divides the latter into a housing 12 and a compartment 31 which are disposed, respectively, in the upper part and in the lower part of the containing body 11.
  • the housing 12 can be configured to accommodate the light source 16 inside it.
  • the dissipator support 22 is configured to position a dissipator element 16a of the light source 16 in contact with the rest surface 22a, capable of dissipating the heat produced by the light source 16.
  • sealing elements 21 are applied between the open ends of the containing body 11 and the closing elements 17, 18, the sealing elements 21 being made of a material with sealing properties and being configured to insulate the light source 16 from the external environment.
  • an apparatus 10 which can be used in all environments which have a risk of explosion that is, at most, low (zone 2 according to ATEX regulations).
  • the apparatus 10 can also be used in environments with a lower risk than the low one, for example in environments in which there is no risk of explosion.
  • the dissipator support 22 can be configured to position a sheet of glass 24 in such a way that it is distanced from or, possibly, in contact with, the light source 16.
  • sealing material 25 and possible sealing elements 21 are applied along the entire periphery of the sheet of glass 24.
  • the apparatus 10 can be used, at most, in environments with an intermediate risk of explosion (zone 1 according to ATEX regulations).
  • the sealing material 25 can be a synthetic elastomer used to make packings (for example, silicone).
  • the dissipator support 22 is equipped with two second protuberances 30 which extend outward and along its entire length.
  • Each second protuberance 30 comprises a lower surface 30a configured to support the sheet of glass 24.
  • These second protuberances 30 are also configured to obtain, during the assembly step, the centering of the light source 16 by means of the possible dissipator element 16a.
  • the lower surface 30a faces toward the external side.
  • the second protuberances 30 can also be configured to delimit the chamber 26.
  • each second protuberance 30 is disposed in such a way as to delimit a second cavity 28, placed laterally with respect to the rest zone of the light source 16. This second cavity 28 extends without a break in continuity between the two open ends of the containing body 11.
  • the dissipator support 22 comprises at least two third protuberances 33 disposed on the same side and outside the second protuberances 30, in such a way as to delimit the second cavity 28.
  • the second cavity 28 is configured to position and possibly additionally prevent the displacement of the sealing material 25.
  • a wall 28a of each second cavity 28 which cooperates with the sealing material 25 has an inclination angle ⁇ , with respect to the vertical, facing toward the inside of the second cavity 28.
  • This solution has the advantage of preventing the sealing material 25, which fills each second cavity 28, from being displaced, for example, following impacts or due to aging. In this way, the sheet of glass 24, once positioned, remains fixed in any condition whatsoever.
  • each third protuberance 33 can comprise at least one holding mean 34 which protrudes outward, laterally with respect to the second cavity 28.
  • the at least one holding mean 34 acts as a striker to correctly position and center the sheet of glass 24 during the assembly steps, delimiting the chamber 26 in which the light source 16 is disposed.
  • the sheet of glass 24 is not subject to alteration of transparency characteristics with aging, throughout the entire operating life of the apparatus 10.
  • the dissipator support 22 can always comprise at least two second protuberances 30 and at least two third protuberances 33 which delimit the two second cavities 28.
  • two possible variants of the apparatus 10 can be provided with the same dissipator support 22 (without sheet of glass 24 and without sealing material 25; with sheet of glass 24 and with sealing material 25).
  • the dissipator support does not comprise any second 30 and third 33 protuberance whatsoever.
  • the containing body 11 acts as a casing for the other elements that make up the apparatus 10, and constitutes the bearing structure of the latter.
  • the compartment 31 of the containing body 11 can be configured to accommodate at least one support element 13.
  • the support element 13 is configured in such a way as to accommodate and attach on it the power supply and control unit 14, which comprises electronic elements configured to power and control the light source 16.
  • the at least one support element 13 can be made, in a single body, during the production of the containing body 11 or of the dissipator support 22, for example by means of extrusion.
  • This solution has the advantage of eliminating any mechanical work with stock removal and reducing assembly times for the production of the apparatus 10.
  • the containing body 11 can comprise, facing inward, first coupling elements 29.
  • the dissipator support 22 can comprise, on the opposite side of the rest surface 22a, second coupling elements 35.
  • the first 29 and second 35 coupling elements are configured to mount the support element 13 of the power supply and control unit 14, without the aid of additional attachment elements.
  • one of the closing elements 17 comprises a hole 36 concentric, or not, with the longitudinal axis X, while the other closing element 18 is blind.
  • the hole 36 is configured to accommodate a watertight cable gland element 20.
  • the cable gland element 20 is configured to allow the passage of the electrical cables that connect to the power supply and control unit 14.
  • the closing elements 17, 18 are the same and both comprise a hole 36.
  • the cable gland element 20 is mounted on one of the closing elements 17, while a watertight cap is mounted on the other closing element 18, making it blind.
  • the closing elements 17, 18 can be made of a material with sealing properties, thus simultaneously achieving both the functions of the closing elements 17, 18 and of the sealing elements 21.
  • a method to produce a lighting apparatus 10 comprises the steps of:
  • the mounting of the dissipator support 22 can occur without the aid of attachment elements, such as screws, bolts and suchlike, by inserting it, for example sliding or by applying pressure, in correspondence with two first cavities 27 made in the containing body 11 which are parallel to the longitudinal axis X.
  • the method to produce the apparatus 10, according to the present invention can possibly also include the steps of:

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Electric Motors In General (AREA)
  • Inorganic Insulating Materials (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP21206586.6A 2020-11-05 2021-11-05 Beleuchtungsvorrichtung und zugehöriges herstellungsverfahren Pending EP3995734A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000026443A IT202000026443A1 (it) 2020-11-05 2020-11-05 Apparato di illuminazione e relativo procedimento di realizzazione

Publications (1)

Publication Number Publication Date
EP3995734A1 true EP3995734A1 (de) 2022-05-11

Family

ID=74347528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21206586.6A Pending EP3995734A1 (de) 2020-11-05 2021-11-05 Beleuchtungsvorrichtung und zugehöriges herstellungsverfahren

Country Status (2)

Country Link
EP (1) EP3995734A1 (de)
IT (1) IT202000026443A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101091307B1 (ko) * 2010-06-08 2011-12-07 심상규 진공 구조를 갖는 ｌｅｄ 형광등
EP2522901A1 (de) * 2011-05-13 2012-11-14 Toshiba Lighting & Technology Corporation Leuchte
KR101475888B1 (ko) * 2014-04-21 2014-12-23 주식회사 삼진엘앤디 Led 조명 장치
US20160369950A1 (en) * 2015-06-19 2016-12-22 Jason Arlen Yeager Tube-style light bulb having light emitting diodes
US20170023221A1 (en) * 2014-01-23 2017-01-26 Nualight Limited An illumination system
FR3080433A1 (fr) * 2018-04-19 2019-10-25 Socobati Tube d'eclairage a led

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101091307B1 (ko) * 2010-06-08 2011-12-07 심상규 진공 구조를 갖는 ｌｅｄ 형광등
EP2522901A1 (de) * 2011-05-13 2012-11-14 Toshiba Lighting & Technology Corporation Leuchte
US20170023221A1 (en) * 2014-01-23 2017-01-26 Nualight Limited An illumination system
KR101475888B1 (ko) * 2014-04-21 2014-12-23 주식회사 삼진엘앤디 Led 조명 장치
US20160369950A1 (en) * 2015-06-19 2016-12-22 Jason Arlen Yeager Tube-style light bulb having light emitting diodes
FR3080433A1 (fr) * 2018-04-19 2019-10-25 Socobati Tube d'eclairage a led

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