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
  • F21V19/00—Fastening of light sources or lamp holders
  • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
  • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
  • F21V19/0035—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
• • 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
  • F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V7/00—Reflectors for light sources
  • F21V7/0066—Reflectors for light sources specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
  • H05B45/40—Details of LED load circuits
  • H05B45/42—Antiparallel configurations
• • 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
  • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
  • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
• • 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
  • F21W2131/30—Lighting for domestic or personal use
• • 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
  • F21Y2113/00—Combination of light sources
  • F21Y2113/10—Combination of light sources of different colours
  • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
• • 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]
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C15/00—Details
  • F24C15/20—Removing cooking fumes
  • F24C15/2064—Removing cooking fumes illumination for cooking hood

Definitions

• the present invention relates to a lighting device, namely designed for use in extractor hoods for extracting cooking fumes.
• Hoods equipped with lighting devices are commonly designed for use both in homes and in restaurants, canteens, public spaces or more.
• Countless types of lighting devices for extractor hoods such as spotlights, are known in the art. Examples of known spotlights are disclosed in DE102016122388, US2019338899 and CN210153660.
• a known spotlight typically comprises a hollow enclosure having a bottom.
• Lighting means usually LEDs, are placed on the bottom of the enclosure.
• the LEDs are soldered to a printed circuit board which is then fixed to the bottom of the enclosure.
• the LEDs are powered by electric cables which have a first end soldered to the support and a second end connected to a connector which, in use, is connected to the mains through the power supply of the hood on which it is installed.
• a concave reflector is fixed inside the enclosure.
• the reflector has an opening, close to the bottom of the enclosure.
• the LEDs are located at the opening, in such positions relative to the reflector as to cause the emitted light to be concentrated toward the desired area.
• DEI 02016122388 discloses a spotlight adapted to be fixed to a wall by means of the interaction between an enclosure of the spotlight and the wall itself.
• this spotlight comprises a hollow enclosure having a bottom opening.
• the printed circuit board, with the LEDs soldered thereupon, is entirely held inside the enclosure by the action of the magnetic force between the wall and the enclosure.
• the DEI 02016122388 enclosure has multiple openings located on the side walls of the enclosure and configured to allow the passage of the power cables welded to the printed circuit board.
• US2019338899 discloses a spotlight in which the printed circuit board is entirely located inside the enclosure and is fixed by the interaction between the transparent cover and the enclosure itself. In particular, the transparent cover is fixed to the enclosure by means of screws.
• the LEDs of the spotlight disclosed in US2019338899 are powered by means of power cables soldered to the printed circuit board.
• CN210153660 discloses a spotlight having an opening located on the bottom wall of the enclosure. This opening is configured to allow the passage of the electric cables for powering the lighting means soldered to the printed circuit board.
• the first end of the cables soldered to the printed circuit board is located inside the enclosure and the second end is located outside the enclosure for connection to the mains.
• the printed circuit board as disclosed in CN210153660 is entirely located inside the enclosure and is fixed by means of the interaction between the enclosure and the reflector. More in detail, this reflector is fixed to the enclosure by means of screws.
• the technical purpose of the present invention is to provide a lighting device for extractor hoods, that can obviate the aforementioned prior art drawbacks.
• a lighting device for extractor hoods that comprises the technical features as disclosed in one or more of the accompanying claims.
• the device of the invention solves the technical problem in that it affords direct access to the support of the lighting means.
• the power connector can be formed directly on the support, and no additional electrical wiring is needed.
• Figure 1 is a front perspective view of a lighting device for extractor hoods of the present invention
• Figure 2 is a rear perspective view of the lighting device of Figure 1 ;
• Figure 3 is a sectional perspective view of the lighting device of Figures 1 and
• Figure 4 is a partially sectional bottom perspective view of the lighting device of Figures 1 and 2;
• Figures 4a and 4b schematically respectively show a socket and a connector of the device of Figures 1 and 2;
• Figure 5 is a schematic view of an embodiment of a power supply circuit of the device of Figures 1 and 2;
• FIG 6 is a schematic view of an alternative embodiment of the socket of Figure 4a.
• numeral 1 designates a lighting device for extractor hoods according to the present invention.
• the device 1 is adapted to be inserted in a lower region of a hood (not shown), to be able to illuminate an underlying cooktop (also not shown).
• the device 1 comprises an enclosure 2.
• the enclosure 2 is hollow and has a preferably axially symmetric, namely prismatic, more preferably substantially cylindrical shape. Therefore, the enclosure 2 has a central axis “A”. In use, the light beam produced by the device 1 is directed substantially along the central axis “A”.
• the enclosure 2 has a side wall 2a, which surrounds the central axis “A”. At a first end of the side wall 2a, the enclosure 2 also has a bottom wall 2b. Preferably, the bottom wall 2b is substantially flat. This bottom wall is arranged transverse, namely perpendicular to the central axis “A”. In use, the bottom wall 2b is hidden from view.
• the enclosure 2 has a recess 10 proximate to the bottom wall 2b.
• Such recess 10 is defined by at least one outer wall 12, which is continuous with the bottom wall 2b and the side wall 2a.
• the outer wall 12 has at least one first portion 12a transverse, namely perpendicular to the bottom wall 2b.
• the outer wall 12 also has a second portion 12b, which is arranged substantially parallel to the bottom wall 2b.
• the device 1 has at least one spring 5 arranged along the outer perimeter of the enclosure 2.
• the spring 5 is made of one piece with the side wall 2a of the enclosure 2, in particular by conveniently forming a portion of the side wall 2a itself.
• the device 1 may comprise a plurality of identical springs 5.
• Lighting means 3 are arranged inside the enclosure 2, in particular proximate to the bottom wall 2b.
• Power supply means 13 are associated with the lighting means 3. Further details about the lighting means 3 and the power supply means 13 will be provided hereinbelow.
• the device 1 comprises a concave reflector 4.
• Such reflector 4 is fixed inside the enclosure 2, and has an at least partially reflecting inner surface 7.
• the reflector 4 may have a parabolic, conical, hemispherical or any other shape, depending on how the light beam will be directed or focused.
• the reflector 4 has an opening 6 proximate to the bottom wall 2b of the enclosure 2.
• the lighting means 3 are located at the opening 6, so as to emit light toward the inner surface 7.
• a flange 4a extends outwards, i.e. away from the opening 6.
• the flange 4a is arranged transverse, namely perpendicular to the central axis “A”.
• the flange 4a of the reflector 4 and the bottom wall 2b of the enclosure 2 are substantially parallel.
• the flange 4a may be visible to the user or hidden by other elements of the hood.
• a cover element 8 which is preferably substantially flat and at least partly transparent, is arranged to close the enclosure 2 at the flange 4a of the reflector 4.
• the cover element 8 contacts the reflector 4 and is placed opposite to the opening 6.
• This cover element 8 locks the reflector 4 inside the enclosure 2 with known methods, for example by means of interference.
• the device 1 comprises a support 9, arranged between the reflector 4 and the enclosure 2, with the lighting means 3 fixed thereto.
• This support 9 is particularly arranged on the bottom wall 2b of the enclosure 2.
• the support 9 is fixed to the enclosure 2 by means of interference between the support 9, the reflector 4 and the enclosure 2.
• the support 9 is locked between the reflector 4 and the casing 2 without requiring special fixation devices such as screws or rivets, and without any treatments such as soldering or bonding.
• the support 9 comprises a board 23.
• This board 23 is namely defined by a printed circuit board.
• the board 23 at least partially contacts the bottom wall 2b of the enclosure 2 and is pressed against the bottom wall 2b by the reflector 4.
• the enclosure 2 has a slot 11 formed on the aforementioned outer wall 12, in particular on the first portion 12a.
• This slot 11 is namely located proximate to the bottom wall 2b of the enclosure 2.
• the support 9 fits in the slot 11, and therefore partially projects outside the enclosure 2, namely into the recess 10.
• the lighting means 3 comprise at least a first 14 and a second 15 light sources fixed to the support 9, and located at the opening 6 of the reflector 4. More in detail, the light sources 14, 15 are preferably LEDs and more preferably are arranged to emit light at distinct color temperatures.
• the power supply means 13 may comprise either a single circuit 20 for both light sources 14, 15, or two separate circuits 20.
• each circuit 20 is defined by the light source 14, 15, preferably a diode, connected in series with a resistor.
• a first terminal 21 of the socket 16 is connected to the cathode of the light source 14, 15.
• the second terminal 22 of the socket 16 is connected to the anode of the light source 14, 15.
• the socket 16 will be configured to connect the negative polarity to the first terminal 21 and the positive polarity to the second terminal 22.
• the first terminal 21 is simultaneously connected to the cathode of the first light source 14 and to the anode of the second light source 15.
• the second terminal 22 of the socket 16 is simultaneously connected to the anode of the first light source 14 and to the cathode of the second light source 15.
• the first light source 14 may be activated.
• the second light source 15 will be activated.
• power supply polarity reversal is the only requirement to be met to select the light source 14, 15 to be activated.
• the supply means 13 comprise a socket 16 formed on the support 9 and located outside the enclosure 2.
• the socket 16 is formed on the support 9 portion which projects into the recess 10.
• the socket 16 is designed to connect with a corresponding connector 17, which is separate from the device 1 and is connected to the electric power supply provided by the hood. This connection can be provided in a first or second mode.
• the power supply means 13 are configured to selectively supply power to the first light source 14 when the connector 17 is connected to the socket 16 in the first mode. Alternatively, when the connector 17 is connected to the socket 16 in the second mode, the power supply means 13 activate the second light source 15.
• the socket 16 comprises a first zone 16a and second zone 16b.
• the socket 16 is connected to the connector 17 in the first mode when the connector 17 fits on the first zone 16a.
• the socket 16 is connected to the connector 17 in the second mode when the connector 17 fits on the second zone 16b.
• the first zone 16a and the second zone 16b of the socket 16 may be either totally distinct from each other, or partially coincident.
• each zone 16a, 16b will carry the terminals 21, 22 of a respective circuit.
• both terminals 21, 22 will be exposed in both zones 16a, 16b but in reversed positions, so that the polarity of the circuit may be reversed by simply moving the connector 17 from the first zone 16a to the second zone 16b and vice versa.
• the socket 16 is not divided into zones 16a, 16b.
• the socket 16 exposes a single contact for each terminal 21, 22.
• the connector 17 may be connected to the socket 16 in two directions.
• the socket 16 is connected to the connector 17 in the first mode when the connector 17 is fitted in the first direction.
• the socket 16 is connected to the connector 17 in the second mode when the connector 17 is fitted in the second direction.
• the connection polarity of the first mode is opposite to the connection polarity of the second mode.
• the connector 17 is symmetric and may be formed, for example, as shown in Figure 4b.
• the connector 17 has a pair of positive terminals 18, which are arranged each on a respective long side and face each other, and a pair of negative terminals 19, which are arranged each on a respective long side and face each other.
• the polarity of the connection may be reversed by simply rotating the connector 17 through 180°.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72801925

Family Applications (1)

Country Status (3)

Family Cites Families (8)

• 2020
  • 2020-07-28 IT IT102020000018280A patent/IT202000018280A1/it unknown
• 2021
  • 2021-07-21 EP EP21755558.0A patent/EP4189287A1/en active Pending
  • 2021-07-21 WO PCT/IB2021/056598 patent/WO2022023889A1/en active Application Filing

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