EP2868965B1 - Lampe doté d'un découplage thermique - Google Patents

Lampe doté d'un découplage thermique Download PDF

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Publication number
EP2868965B1
EP2868965B1 EP13191183.6A EP13191183A EP2868965B1 EP 2868965 B1 EP2868965 B1 EP 2868965B1 EP 13191183 A EP13191183 A EP 13191183A EP 2868965 B1 EP2868965 B1 EP 2868965B1
Authority
EP
European Patent Office
Prior art keywords
housing
lamp
chamber
sight glass
gas
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
Application number
EP13191183.6A
Other languages
German (de)
English (en)
Other versions
EP2868965A1 (fr
Inventor
Udo Glittenberg
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.)
FH Papenmeier GmbH and Co KG
Original Assignee
FH Papenmeier GmbH and Co KG
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 FH Papenmeier GmbH and Co KG filed Critical FH Papenmeier GmbH and Co KG
Priority to EP13191183.6A priority Critical patent/EP2868965B1/fr
Publication of EP2868965A1 publication Critical patent/EP2868965A1/fr
Application granted granted Critical
Publication of EP2868965B1 publication Critical patent/EP2868965B1/fr
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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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/023—Power supplies in a casing
    • 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
    • F21V23/007—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 enclosed in a casing
    • F21V23/009—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 enclosed in a casing the casing being inside the housing of the lighting device
    • 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
    • F21V29/15—Thermal insulation
    • 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
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • 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
    • 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
    • F21V29/673—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for intake
    • 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
    • F21V29/677—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for discharging
    • 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
    • F21V29/767—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 directions perpendicular to the light emitting axis
    • 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 invention relates to a suitable for use in potentially explosive environments sight glass for illuminating containers, boilers, pipelines and the like.
  • the light source of a sight glass lamp is arranged in a lamp chamber, so that it is protected from dust, water and other adverse external influences.
  • the waste heat of the light source can therefore not be released by radiation and convection directly to the outside environment, but must be dissipated through the housing of the sight glass.
  • a housing electronics located in the housing, by or via which the light source is supplied with electrical energy must not be overheated.
  • the connection electronics can contain temperature-sensitive components, for example a capacitor which must or must be kept below the temperature of a hot spot resulting from the lighting operation in the luminaire housing.
  • the light source in particular an LED, must likewise not be heated above defined temperatures.
  • Sight glass lights as the invention relates in particular, are used for example in the EP 0 378 734 B1 and the DE 93 10 049 U1 disclosed.
  • the luminaire housing of the sight glass lamps known therefrom are subdivided by means of a dividing wall into a luminaire chamber for the light source and an electronics or electrical chamber for the connection electronics or electrics.
  • the US 2011/0068687 A1 relates to a bulb-shaped lamp for screwing into a lamp with a known socket for light bulbs.
  • the luminaire housing through which the entire waste heat is dissipated, represents a factor limiting the luminous intensity of the light source, so that so far only light sources with correspondingly low power can be used.
  • the known luminaire housing would have to be increased. However, practice limits this.
  • the invention is based on a sight glass lamp (hereinafter referred to as light) comprising a lamp housing with a lamp chamber, arranged in the lamp chamber light source, a terminal housing with a pressure-resistant electronic chamber and arranged in the electronics chamber supply electronics for supplying the light source with electrical energy ,
  • the luminaire chamber has a translucent, preferably transparent chamber wall, through which the light source illuminates to the outside.
  • the translucent chamber wall may in particular be a glass wall, as is known from the prior art for sightglass luminaires.
  • the waste heat generated during operation of the light source is dissipated via the lamp housing, that is transmitted from the light source to the lamp housing and dissipated by this by radiation and convection to the outside environment.
  • the luminaire housing forms a free outer surface of the luminaire. It protects the captured components, in particular the light source and the supply electronics, and is preferably such. in its dimensions and / or its geometry and / or its material, that it can deliver the entire waste heat of the lamp by heat radiation and / or convection to a heat sink, preferably the outer environment of the lamp. If it is arranged on a structure, such as a sight glass or directly on a container or pipe, which is cooler than the luminous housing, at least a portion of the heat can also be delivered via heat conduction to the structure in question, for example via a direct contact of the luminaire housing and Structure or via a fastening device, such as a holder, which has the lamp housing or the structure for the lamp housing.
  • the structure such as a sight glass
  • the luminaire housing is a metal housing.
  • it is molded from a single metal material.
  • metal materials for example, made of several housing parts that differ in material from each other.
  • Preferred metal materials are aluminum, aluminum alloys, iron and iron alloys.
  • Outer walls of the lamp housing advantageously have a thickness of at least 3 mm. Preferably, this also applies to inner walls of the lamp housing, such as one or more partitions, which subdivide or subdivide the lamp housing into two or more separate chambers.
  • the light source can consist of only a single, correspondingly high-intensity light-emitting diode, but preferably several light-emitting diodes (LEDs) together form the light source.
  • the light-emitting diodes can in particular be arranged to form an LED array or LED field.
  • the LEDs are arranged in advantageous embodiments on a carrier board, wherein the carrier board is advantageously made sufficiently large and made of a thermally highly conductive material in order to dissipate the waste heat of the LEDs sufficiently quickly.
  • a carrier board can in particular be thermally conductively connected at its rear side with a housing structure of the lamp housing in order to deliver the waste heat advantageously over a large area to the lamp housing.
  • the electrical power consumption of the light source can be due to the invention easily 20 watts and more, for example, 20 to 50 watts.
  • the light source can at its rear, such as at the back of said carrier board, quite up to 100 ° C and also heat it, while the supply electronics is preferably heated to at most 70 ° C.
  • the pressure-resistant electronic chamber At least a predominant part is arranged in the lamp housing, that is surrounded by one or more outer walls of the lamp housing.
  • the electronics chamber is wholly, i. with their entire volume, arranged in the luminaire housing.
  • the term "electronics" is understood in a broad sense.
  • one or more or all or all components of the supply electronics can each be an electronic element in the strict sense or, instead, in each case be a purely electrical element. The invention thus does not distinguish between electrical and electronic.
  • the term "electronic chamber” is synonymous with the electrical chamber and electronic and electrical chamber.
  • the sight glass lamp for thermal decoupling of terminal housing and lamp housing comprises an insulation which surrounds at least a major part of the electronics chamber.
  • the surface of the connection housing surrounded by the insulation has no direct heat-conducting contact with the luminaire housing, since this surface has contact only with the insulation, and in this sense is thermally decoupled from the luminaire housing, which dissipates waste heat from the light source. It is advantageous if heat-conducting contact of the luminaire housing and connection housing is reduced to a minimum, for example contact via an internal supply line for the electrical energy and / or the transmission of signals and / or contact required for mounting the connection housing via one or more attachment structures. The corresponding contact areas can not of course be in contact with the insulation according to the invention.
  • the terminal housing is despite its at least partial arrangement in the lamp housing an independent housing, a housing in the housing.
  • the walls of the light housing heated by the light source do not conduct or radiate as in The prior art, the waste heat directly into the electronics chamber, but are thermally isolated or isolated from the insulation to the inside of the electronics chamber.
  • the insulation may in principle be formed of an insulating solid or even of an insulating liquid, it is preferred embodiments when a gas, suitably air, forms the insulation or at least a major part of the insulation.
  • the insulating gas can be taken from a gas reservoir associated with the lighting chamber.
  • the gas reservoir can be formed, in particular, by the external environment of the luminaire housing, that is to say by the ambient air in most applications.
  • the lamp is designed so that directly the ambient air can form the insulating gas.
  • a gas which is more inflammable than air such as carbon dioxide
  • the heavier than air flammable gas can be provided by means of the gas reservoir, such as a gas cylinder and directed to the luminaire housing, so that it keeps the air or any other type of gas from the environment of the luminaire housing from the luminaire housing or in a reduced degree to the luminaire housing permeate.
  • the flame retardant gas can thus serve not only as an insulating gas in the luminaire housing, but also as an outer shield.
  • the luminaire housing and the connection housing are designed in shape and size such that a free insulating space remains between the luminaire housing and the connection housing around the electronics chamber, which can be filled with an insulating gas or through which gas flows for thermal separation of the connection housing and luminaire housing , wherein the variant of the flow through preference is given, since with the gas flow heat can be discharged from the insulating space.
  • This may be a forced convection flow, by arranging a fan in the insulating space or at a suitable other location in the luminaire housing, which fan generates the convection flow or supports a natural convection flow.
  • the fan can also be supplied with electrical energy, for example, by or via the supply electronics.
  • the fan drive must either be specially encapsulated or cause a reduction in the degree of explosion safety.
  • an insulating gas can also be held in the insulating space, preferably under a slight overpressure relative to the external environment, and, if necessary, be conveyed from an associated gas reservoir.
  • the gas in question can be conveyed in a closed circuit from an associated gas reservoir and back into the gas reservoir.
  • the gas is air from the immediate external environment of the sight glass, so that the environment is used as a gas reservoir.
  • an air flow through the insulating space due to natural convection due to temperature differences in and / or over an extension of the lamp housing adjusts.
  • the convection flow is preferably assisted by gravity; it can also be significantly generated by gravity.
  • the light can, as already mentioned, be a sight glass. As such, it may be disposed on a sight glass of a container or piping or the like. It can be an integral part of a sight glass such as a sight glass designed as a porthole or a flow-through sight glass. It can also be releasably attached to a sight glass by means of a fastening device.
  • the invention also relates to a sight glass as such, prior to arrangement on a sight glass or container or a pipe or the like. The invention is not limited to sight glass lamps.
  • the luminaire may be a vehicle or luminaire vehicle luminaire for other equipment used or suitable for use in potentially explosive atmospheres, such as forklifts in dusty or gaseous environments, or refueling vehicles and equipment.
  • the lamp can also be a flashlight, such as to illuminate barrels.
  • the luminaire must only be suitable for use in potentially explosive areas and the light source and supply electronics must be sufficiently securely encapsulated for use in such areas.
  • FIG. 1 shows a sight glass lamp of a first embodiment in a longitudinal section.
  • the sight glass lamp comprises a lamp housing 1 with a closed lamp chamber 2 and a receiving space 3.
  • a light source 9 is arranged, the light is emitted through a translucent chamber wall 6 in the outer environment of the sight glass lamp.
  • the light of the light source 9 is bundled by means of a reflector 10 arranged in the luminaire chamber 2 in the direction of the translucent chamber wall 6.
  • the chamber wall 6 is preferably transparent. It can be designed as known from sight glass lights.
  • the chamber wall 6 is disposed on a front side of the sight glass lamp.
  • the chamber wall 6 sits the chamber wall 6 in a housing cover 7 which is fixed to a housing main part of the lamp housing 1 by means of fasteners, such as screw, so that the cover 7 with the arranged in or on the lid 7 chamber wall 6, the lamp chamber. 2 tightly closes at its front.
  • the luminaire housing 1 expediently surrounds the luminaire chamber 2 so that it is dustproof and watertight, so that the light source 9 is protected against damaging influences from the external environment.
  • a partition 5 of the lamp housing 1 separates the lamp chamber 2 within the lamp housing 1 from the receiving space 3.
  • the partition 5 closes the lamp chamber 2 as preferred, but only by way of example of the translucent chamber wall 6 axially opposite back.
  • the partition 5 is part of the housing main part of the lamp housing. It can, as in the exemplary embodiment, be formed in one piece with peripheral walls of the housing main part or else with one around a central longitudinal axis L the sight glass surrounding peripheral wall and be sufficiently tightly joined for the completion of the lamp chamber 2.
  • a circumferential wall 4 of the housing main part which extends from the partition wall 5 toward the rear end of the sight glass lamp, surrounds the receiving space 3 on the circumference. In longitudinal section, the housing main part has an H-shape. This favors a simple and therefore cost-effective production and compact design and ease of manual handling of the sight glass, but is only an optional feature of the sight glass.
  • a connection housing 11 is arranged, which encloses and encapsulates an electronics chamber 12.
  • a supply electronics for supplying the light source 9 is arranged with electrical energy.
  • the invention includes, for example, a power supply that includes only electrical and no electronic components in the strict sense.
  • the terminal housing 11 forms a housing in the lamp housing 1.
  • the terminal housing 11 on the other hand also includes the receiving space 3 and thus the lamp housing 1 at its rear side.
  • the receiving space 3 could instead also be closed by means of a separate cover housing 11 or other housing part and the terminal housing 11 disposed in the receiving space 3 and on the light housing 1, for example on such a cover cover, supported.
  • connection housing 11 with its connection housing region surrounding the electronics chamber 12, protrudes axially into the receiving space 3 from the rear side.
  • the connection housing 11 has a projecting on its outer circumference, around the longitudinal axis L encircling flange 15, with which it is attached to the lamp housing 4.
  • the flange 15 faces with an underside of a rear end face of the peripheral wall 4 and is pressed by means of fastening elements 17 with a certain compressive force in the direction of the end face of the peripheral wall 4.
  • connection housing 11 comprises a front wall 13 facing the partition wall 5, one of which projects upwards in the direction of the rear side Circumferential wall 14, the aforementioned flange 15, which projects at the rear end of the peripheral wall 14 to the outside, and a rear wall 16, which is formed in the embodiment of a lid, which closes the electronics chamber 12 at its rear side tight.
  • the connection housing 11 closes the electronics chamber 12 advantageously water and dustproof.
  • the connection housing 11 can seal the electronics chamber 12 in a manner comparable to the luminaire chamber 2.
  • the encapsulation of the chambers 2 and 12 is advantageously designed so that the sight glass lamp can be used in a potentially explosive environment in continuous operation.
  • This insulating space comprises a front insulation space 3a, the axially between the partition 5 of the lamp housing 1 and the front wall 13 of the terminal housing 11 free remains, and the electronics chamber 12 surrounding its circumference mission personnel 3b, which remains free radially between the peripheral wall 4 of the lamp housing 1 and the peripheral wall 14 of the terminal housing 11 as a 360 ° continuously circulating annular space.
  • the front-side insulating space 3a and the peripheral insulating space 3b together form a coherent insulating space 3a, 3b.
  • the supply electronics are electrically connected to the light source 9 via a supply line 20.
  • the supply line 20 extends through one of the housing walls of the terminal housing 11, as preferably through the front wall 13, and the partition wall 5 to the light source 9.
  • the supply line 20 is held by connection structures 21 and 22.
  • the connection structure 21 further serves to seal the lamp chamber 2 and is connected for this purpose tightly with the partition wall 5.
  • the connection structure 22 seals the connection housing 11 in the region of the supply line 20. Due to the preferred arrangement, but only by way of example, of the arrangement of the connection structures 21 and 22 in FIG Partition wall 5 and the front wall 13, the supply line 20 extends exclusively through the front insulation space 3a.
  • the supply line 20 extends as a flying line through the insulating space 3a, 3b.
  • the associated with the energy supply heat conduction between the lamp housing 1 and terminal housing 11 can be kept low thereby.
  • the insulating space 3a, 3b is filled with air.
  • the resulting air cushion around the electronics chamber 12 provides the desirable thermal decoupling from the lamp housing 1, via which the waste heat of the light source 9 is dissipated.
  • a plurality of openings are provided, which connect the insulating space 3a, 3b with the outside environment of the sight glass lamp and ensure that form a convective flow in the insulating space 3a, 3b and waste heat can be dissipated by convection ,
  • the peripheral wall 4 penetrate in the region of the front-side insulating space 3a first openings 23, which are distributed around the longitudinal axis L distributed in the circumferential direction spaced from each other.
  • Second openings 24 are formed in the region of the rear end of the personnelsisolierraums 3b between the rear end face of the peripheral wall 4 and the axially facing opposite flange 15 of the terminal housing 11.
  • the flange 15 is axially supported on the peripheral wall 4 via spacers 18.
  • the spacers 18 may be sleeve members surrounding the fasteners 17 so as to leave said gap between the peripheral wall 4 and the flange 15 which is interrupted only by the fasteners 17 and spacers 18.
  • the fastening elements 17 and spacers 18 can advantageously be made of a thermally insulating material. A production of metal is also possible. Due to the small contact surfaces - there is virtually only selective contact - the heat conduction can be kept low even in such embodiments.
  • the flange 15 extending openings extending, which may replace the second openings 24 or may be provided in addition to these.
  • the spacers 18 of the embodiment can be replaced, in particular in embodiments in which such openings pass through the flange 15, by an annular sealing structure, which rotates about the longitudinal axis L, wherein such a sealing structure would advantageously also be made of a thermal insulating material.
  • cooling structures 8 for example in the form of cooling fins are arranged on the outer periphery of the lamp housing.
  • the surface-enlarging cooling structures 8 are formed on the main lamp housing 1.
  • circumferential cooling fins may be milled.
  • the cooling structures 8 are more pronounced, in the example milled deeper into the material than in the region of the peripheral wall of the lamp chamber 2 in order to increase the cooling effect.
  • the light source 9 is an LED chip with a plurality of light emitting diodes, which are arranged on a disc-shaped carrier board. Such LED chips are commercial goods.
  • the light source 9 is arranged on the partition wall 5, wherein the planar carrier board is connected with its rear good heat conducting with the partition wall 5, so that the waste heat of the light emitting diodes already distributed over a comparatively large area can be introduced into the partition 5.
  • the introduced waste heat is initially distributed in the partition 5, which, as in the example advantageously compared to other wall structures of the lamp housing 1 massively, ie in comparatively large wall thickness, can be performed.
  • the heat is distributed in the on the partition wall 5 to the front and back protruding peripheral walls, from which they are radiated over a large area and also dissipated via convection.
  • the cooling structures 8 already ensure increased radiation in the region of the heat generator, the light source 9.
  • a convection flow which ensures that the waste heat of the light source 9 can not heat the power electronics located in the electronics chamber 12 to unacceptably high temperatures. Since the temperature in the region of the partition wall 5 is higher than at the rear end of the receiving space 4, a convection flow is created. Air can accordingly flow from the partition wall 5 near, front-side isolation space 3a toward the rear end, with cooler air flows from the outside environment through the first openings 23 and the heated air at the remote from the partition 5, the rear end by the second Openings 24 or mentioned, optional openings in the flange 15 exits. An axial convection flow from the first openings 23 toward the rear end of the insulating space 3a, 3b or in the reverse direction can be enhanced by an inclined arrangement of the sight glass lamp or the longitudinal axis L, by gravity.
  • FIG. 2 shows the sight glass of the first embodiment in a front view of the arranged in the lid 7 translucent chamber wall 6. Also visible is a laterally arranged on the lamp housing 1 holder 26, with which the sight glass light can be attached to a container to be monitored. Typically, sight glass fittings are arranged on the containers to be monitored, which are adapted for attachment of the sight glass, so that can be illuminated by means of the sight glass light through a sight glass of the valve into the container interior.
  • the invention allows light sources 9 to be used with a higher light output than hitherto possible, yet to deliver their waste heat without additional measures solely through the luminaire housing 1 to the external environment.
  • FIG. 3 shows the sight glass of the first embodiment in a cross section through the front-side insulating space 3a.
  • FIG. 4 a sight glass lamp of a second embodiment is shown.
  • the lamp housing 1 is the same as in the first embodiment.
  • FIG. 4 shows a 90 ° to FIG. 1 tilted longitudinal section plane. Is compared to the first embodiment only the terminal housing 11 modified, but only in a manner not affecting the thermal decoupling manner.
  • the electronic chamber 12 is completed by a back cover 16 formed as a mounting lid, closes in the second embodiment, a non-detachable, since integrally formed rear wall 16, the electronics chamber 12 at the rear end.
  • an additional chamber 30 is formed, which is closed at its rear by means of a mounted housing cover 31.
  • the external terminal 19 is arranged on the housing cover 31.
  • the internal supply line 20 is correspondingly connected to the port 19 through an opening 31 passing through the rear wall 16 and through the additional chamber 30.
  • the supply line 20 is held in the region of the rear wall 16 by a connection structure arranged in the opening 31, which is comparable to the connection structures 21 and 22, wherein this connection structure (not illustrated) also simultaneously ensures a tight closure of the electronics chamber 12. Due to the additional chamber 30 and in particular the thereby enabling internal encapsulation of the electronics chamber 12, the user gains certain freedom with regard to the choice and the arrangement of the external terminal 19, furthermore, the explosion safety can be increased.
  • FIG. 5 shows the sight glass of the second embodiment in a rear view, ie in the direction of the back cover 31 and the flange 15 of the connection housing 11.
  • Recognizable are a plurality of rear openings 25 which are arranged distributed about the central longitudinal axis L and pass through the flange 15 in the axial direction , Such openings have been pointed out in the context of the first embodiment as an option.
  • the openings 25 may be provided in addition to the second openings 24 arranged on the circumference or instead, as has also been pointed out in the first exemplary embodiment.
  • a final difference from the first embodiment is that the front wall 13 of the terminal housing 11 is formed as a mounted housing cover.
  • the sight glass lamp of the second embodiment corresponds to that of the first, so that the local statements also apply with respect to the second embodiment.
  • FIGS. 6 and 7 a sight glass lamp of a third embodiment is shown, which is also derived from the first embodiment. It differs from the first exemplary embodiment on the one hand in that the cooling structures are enlarged to the outside and are therefore provided with the reference numeral 38 for the purpose of distinction. Their arrangement with respect to the lighting chamber 2 and the partition wall 5 are unchanged, only the radiating surface is increased. Another difference is that the rear wall 16 of the terminal housing 11 is formed in one piece with the peripheral wall 14 and instead the front wall 13 is formed as a mounted lid. Apart from the differences explained, the sight glass lamp corresponds to that of the first embodiment, so that reference may be made to the statements there.
  • the light source 9 is assigned in each case a reflector, which may be formed and arranged in particular as in the first embodiment.
  • the reflector 10 in the first embodiment and in principle in other embodiments omitted.
  • the luminaire housing 1 could directly form a reflector with its circumferential inner surface surrounding the luminaire chamber 2 or a part of this peripheral inner surface.
  • a reflector arranged in the luminaire chamber 2 specifically for the light source 9 is given preference, since such a shape and surface properties better, at least easier, can be optimized in terms of its reflector function as the luminaire housing 1 in the region of said peripheral inner surface.
  • FIG. 8 shows in a longitudinal section a sight glass lamp of a fourth embodiment.
  • the terminal housing 11 is mounted in the region of its front wall 13 by means of a connection and mounting structure 35 in the lamp housing 1.
  • the internal supply line 20 extends through the connection and mounting structure 35, thus does not extend as in the previous embodiments flying through the insulating space 3a.
  • the terminal housing 11 is centered in the receiving space 3 only by a plurality, for example three centering elements 29 and supported on the lamp housing 1.
  • the mounting flange 15 of the previous embodiments is omitted.
  • the front-side insulating space 3a is penetrated by the connecting and fastening structure 35 projecting as preferred, but only by way of example centrally from the front wall 13 of the connection housing 11 in the direction of the front side. In this area creates a certain thermal bridges. In contrast, the thermal bridges over the comparatively slender centering elements 29 are negligible.
  • it may be formed from an insulating material or provided with an insulating outer layer.
  • a distributed large opening 27 is obtained, which rotates in the embodiment over 360 °, the longitudinal axis L without interruption.
  • FIG. 9 shows the sight glass of the fourth embodiment in a rear view, in the through the rear opening 27 and the insulating space 3a, 3b through the partition wall 5 can be seen.
  • the sight glass of the fourth embodiment corresponds to that of the first embodiment, so that reference may be made to the statements there.
  • FIG. 10 shows in a longitudinal section a sight glass lamp of a fifth embodiment, which is derived from the fourth embodiment and this particular with respect to the assembly, ie with respect to the connection and mounting structure 35 and the centering elements 29 corresponds. It is modified only in the region of the peripheral wall 4 with respect to the fourth embodiment. The modification is that the inner peripheral surface 34 of the peripheral wall 4 is increased in order to introduce more heat into the air flow, which flows through the insulating space 3a, 3b.
  • FIG. 11 shows the sight glass of the fifth embodiment in a rear view.
  • the circumferential surface 34 is corrugated in the circumferential direction about the longitudinal axis L, so that the peripheral wall 4 on the inside has axially extending wave crests and wave troughs.
  • FIGS. 12 and 13 show a sight glass lamp of a sixth embodiment in isometric view and in a rear view.
  • the luminaire housing 1 has as preferred, but only by way of example, over its entire length a circular-cylindrical cross-section, as is otherwise the case with the other exemplary embodiments. This results, inter alia, a compact design and also a simple production, but such a design is not mandatory.
  • the sixth embodiment is also derived from the fourth embodiment, so that reference may be made to the statements there and, moreover, to the comments on the first embodiment.
  • a flow guiding structure 36 is arranged in the peripheral insulating space 3b, which divides the insulating space 3b into axially extending flow channels.
  • the Strömungsleit Nursing 36 is exemplified as a corrugated structure and contacted with wave crests, the peripheral wall 4 of the lamp housing 1 and wave troughs the peripheral wall 14 of the connection housing 11.
  • the Strömungsleit Fabric 37 may also extend axially into the front insulation space 3a, ultimately up against the partition wall 5.
  • FIGS. 12 and 13 are not designated, reference is made to the other embodiments, since the sixth embodiment does not differ in this regard from the other embodiments.
  • FIGS. 14 and 15 show a sight glass of a seventh embodiment in a cross section through the front-side insulating space 3a and in a side view.
  • a fan wheel 37 is arranged in the insulating space 3a in order to assist the convection flow through the insulating space 3a, 3b or to ensure that a convection flow in the axial direction is established regardless of the inclination of the sight glass lamp, in particular also in the case of horizontal alignment.
  • the fan drive can in the insulating space 3a or for example in the electronics chamber 12 or instead in the auxiliary chamber 30 of the second embodiment ( FIG. 4 ) and be encapsulated in this way.

Claims (15)

  1. Lampe pour verre-regard destinée à être utilisée dans des zones présentant un risque d'explosion, la lampe incluant :
    (a) un boîtier de lampe (1) avec une chambre de lampe (2) comportant une paroi de chambre translucide (6),
    (b) une source de lumière (9), de préférence un dispositif à diodes électroluminescentes, agencée dans la chambre de lampe (2), dont la chaleur émise est évacuée par le boîtier de lampe (1),
    (c) un boîtier de raccordement (11) avec une chambre électronique résistante à la pression (12) dont au moins une majeure partie est agencée dans le boîtier de lampe (1),
    (d) une électronique d'alimentation agencée dans la chambre électronique (12) pour alimenter la source de lumière (9) en énergie électrique,
    (e) et une isolation (3, 14, 24) pour un découplage thermique du boîtier de raccordement (11) et du boîtier de lampe (1),
    (f) dans laquelle l'isolation (3, 14, 24) entoure au moins une majeure partie de la chambre électronique (12).
  2. Lampe pour verre-regard selon la revendication précédente, caractérisée en ce qu'un gaz, de préférence de l'air, forme au moins une partie de l'isolation.
  3. Lampe pour verre-regard selon l'une des revendications précédentes, caractérisée en ce qu'un espace isolant libre (3a, 3b) subsiste autour de la chambre électronique (12) entre le boîtier de lampe (1) et le boîtier de raccordement (11), lequel espace isolant peut être rempli de gaz pour une séparation thermique du boîtier de raccordement (11) et du boîtier de lampe (1) ou peut être traversé par du gaz.
  4. Lampe pour verre-regard selon la revendication précédente, caractérisée en ce que la source de lumière (9) est électriquement reliée à l'électronique d'alimentation au moyen d'un fil d'alimentation (20) interne par rapport au boîtier de lampe (1) et le fil d'alimentation interne (20) s'étend à travers l'espace isolant (3a, 3b), de préférence sous la forme d'un fil volant.
  5. Lampe pour verre-regard selon l'une des deux revendications qui précèdent immédiatement, caractérisée en ce que l'espace isolant (3a, 3b) est relié à un réservoir de gaz, de préférence l'environnement extérieur du boîtier de lampe (1), par l'intermédiaire d'ouvertures (23, 24, 25 ; 23, 27 ; 23, 28), de telle sorte que du gaz dans l'espace isolant (3a, 3b) peut s'écouler à partir du réservoir de gaz à travers au moins une des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) et à partir de l'espace isolant (3a, 3b) à travers au moins une autre des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28).
  6. Lampe pour verre-regard selon la revendication précédente et présentant au moins l'une des caractéristiques (i) à (iv) qui suivent immédiatement :
    (i) au moins une des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) traverse le boîtier de lampe (1),
    (ii) un espace (24) résiduel entre le boîtier de lampe (1) et le boîtier de raccordement (11) forme au moins l'une des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28),
    (iii) au moins une majeure partie de la chambre électronique (12) est agencée dans un espace de réception (3) du boîtier de lampe (1), et au moins une des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) traverse une paroi circonférentielle (4) du boîtier de lampe (1) entourant l'espace de réception (3),
    (iv) au moins une majeure partie de la chambre électronique (12) est agencée dans un espace de réception (3) du boîtier de lampe (1), et au moins une des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) traverse une paroi frontale (15, 16) fermant l'espace de réception (3).
  7. Lampe pour verre-regard selon l'une des deux revendications qui précèdent immédiatement et présentant au moins une des caractéristiques (i) et (ii) qui suivent immédiatement :
    (i) les ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) sont éloignées les unes des autres et agencées les unes par rapport aux autres de sorte que le gaz s'écoule à travers l'espace isolant (3a, 3b) en raison de la chaleur émise par la source de lumière (9) et de la pesanteur et évacue la chaleur par convection naturelle,
    (ii) dans le boîtier de lampe (1), de préférence dans l'espace isolant (3a, 3b) spécifié dans au moins une des autres revendications, est agencée une roue à aubes (37) pouvant être entraînée par un moteur, au moyen de laquelle le gaz peut être transporté à travers le boîtier de lampe (1), de préférence à travers l'espace isolant (3a, 3b), soit sans soit en plus d'une convection naturelle selon la caractéristique (i) qui précède.
  8. Lampe pour verre-regard selon l'une des trois revendications qui précèdent immédiatement et présentant au moins une des caractéristiques (i) et (ii) qui suivent immédiatement :
    (i) au moins une première des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) est plus proche de la source de lumière (9) qu'au moins une seconde des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28),
    (ii) au moins une des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) débouche à proximité d'une première extrémité de la chambre électronique (12) et au moins une autre des ouvertures (23, 24, 25 ; 23, 27 ; 23, 28) débouche dans l'espace isolant (3a, 3b) à proximité d'une seconde extrémité de la chambre électronique (12) éloignée de la première extrémité.
  9. Lampe pour verre-regard selon l'une des revendications précédentes, caractérisée en ce qu'une paroi de séparation (5) dans le boîtier de lampe (1) sépare la chambre de lampe (2) du boîtier de raccordement (11), une paroi (13) du boîtier de raccordement (11) fait face à la paroi de séparation (5) et entre la paroi de séparation (5) et la paroi de boîtier de raccordement (13) opposée subsiste un espace isolant libre (3a) qui peut être rempli de gaz pour une séparation thermique du boîtier de raccordement (11) et du boîtier de lampe (1) ou qui peut être traversé par du gaz.
  10. Lampe pour verre-regard selon l'une des revendications précédentes, caractérisée en ce qu'une paroi circonférentielle (4) du boîtier de lampe (1) entoure le boîtier de raccordement (11) et un espace isolant circonférentiel libre (3b) subsiste dans la zone de la chambre électronique (12) située entre le boîtier de raccordement (11) et la paroi circonférentielle (4), lequel espace isolant est rempli de gaz pour une séparation thermique du boîtier de raccordement (11) et du boîtier de lampe (1) ou peut être traversé par du gaz.
  11. Lampe pour verre-regard selon la revendication précédente et présentant au moins une des caractéristiques (i) et (ii) qui suivent immédiatement :
    (i) l'espace isolant circonférentiel (3) entoure entièrement le boîtier de raccordement (11) à 360° dans la zone de la chambre électronique (12),
    (ii) un gaz, de préférence de l'air, présent dans l'espace isolant circonférentiel (3) forme un coussin de gaz enveloppant entièrement sur 360° le boîtier de raccordement (11) dans la zone de la chambre électronique (12),
    (iii) l'espace isolant circonférentiel (3b) s'étend sur toute la longueur ou sur au moins une majeure partie de la longueur de la chambre électronique (12).
  12. Lampe pour verre-regard selon l'une des revendications précédentes, caractérisée en ce que le boîtier de lampe (1) comporte un espace de réception (3) qui sépare une paroi de séparation (5) de la chambre de lampe (2) et qui est ouvert à un côté opposé à la chambre de lampe (2), le boîtier de raccordement (11) est assemblé à la chambre électronique (12) sur le côté ouvert dans l'espace de réception (3) faisant saillie à partir du boîtier de lampe (1), est de préférence fixé sur le boîtier de lampe (1) avec des éléments de fixation (17) et laisse à partir de l'espace de réception (3) un espace isolant libre (3a, 3b) autour de la chambre électronique (12) qui est rempli de gaz pour une séparation thermique du boîtier de raccordement (11) et du boîtier de lampe (1) ou qui peut être traversé par du gaz.
  13. Lampe pour verre-regard selon l'une des revendications précédentes, caractérisée en ce que la source de lumière (9) inclut une DEL ou plusieurs DEL et est de préférence une puce de DEL plate.
  14. Lampe pour verre-regard selon l'une des revendications précédentes, caractérisée en ce que la source de lumière (9) inclut une DEL ou plusieurs DEL qui est ou sont agencées sur un support, de préférence une platine qui est en contact de conduction de chaleur avec une paroi de boîtier (5) du boîtier de lampe (2), de préférence la paroi de séparation (5) selon l'une des autres revendications spécifiant la paroi de séparation (5).
  15. Lampe pour verre-regard selon l'une des revendications précédentes, caractérisée en ce que le boîtier de raccordement (11) est fixé sur la paroi de séparation (5) et est supportée par celle-ci au moyen d'une structure de raccordement et de fixation (35) qui s'étend depuis le boîtier de raccordement (11) à travers l'espace isolant (3a, 3b) spécifié dans au moins une des autres revendications jusqu'à ou dans la paroi de séparation (5) spécifiée dans au moins l'une des autres revendications, et la source de lumière (9) est électriquement reliée à l'électronique d'alimentation au moyen d'un fil d'alimentation (20) interne par rapport au boîtier de lampe (1), dans laquelle le fil d'alimentation interne (20) s'étend depuis le boîtier de raccordement (11) jusqu'à la paroi de séparation (5), de préférence à l'intérieur de la structure de raccordement et de fixation (35).
EP13191183.6A 2013-10-31 2013-10-31 Lampe doté d'un découplage thermique Active EP2868965B1 (fr)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10203103B2 (en) 2016-02-08 2019-02-12 Cree, Inc. LED luminaire having enhanced thermal management
US10234127B2 (en) 2016-02-08 2019-03-19 Cree, Inc. LED luminaire having enhanced thermal management

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3982042A1 (fr) * 2020-10-12 2022-04-13 Eaton Intelligent Power Limited Assemblage et procédé de luminaire à haut rendement lumineux pour emplacement difficile et dangereux

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0378734A1 (fr) * 1989-01-20 1990-07-25 Friedrich Horst Papenmeier Lampe pour regard

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DE2816812C2 (de) 1978-04-18 1983-08-11 Erhard Rahn GmbH, 1000 Berlin Leuchtengehäuse einer Hochleistungslampe
DE9310049U1 (de) 1993-07-06 1994-11-10 Papenmeier Friedrich Horst Elektrische Schauglasleuchte
US8038329B2 (en) * 2009-02-04 2011-10-18 Panasonic Corporation Bulb-shaped lamp and lighting device
CN202132770U (zh) * 2011-07-26 2012-02-01 深圳市耐比光电科技股份有限公司 一种led防爆灯

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0378734A1 (fr) * 1989-01-20 1990-07-25 Friedrich Horst Papenmeier Lampe pour regard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10203103B2 (en) 2016-02-08 2019-02-12 Cree, Inc. LED luminaire having enhanced thermal management
US10234127B2 (en) 2016-02-08 2019-03-19 Cree, Inc. LED luminaire having enhanced thermal management

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