DE102014000582A1 - Light emitting device - Google Patents

Abstract

In a light emitting device (1), in particular ceiling or wall light, with at least one lighting unit (3), in particular an LED unit, the device (1) is at least in two parts, wherein between the at least two parts (2, 4) a gap (11) is provided and the lighting unit (3) is arranged in the first part (4), this first part (4) for dissipating the heat emitted by the lighting unit (3) comprising a number of air flow-around ribs (10), and / or pins or pins (100).

Description

The invention relates to a light-emitting device, in particular ceiling or wall light, with at least one light and heat emitting lighting unit, in particular an LED unit.

Ceiling lights and wall lights as light emitting devices are known in the art. These usually include a base plate with which they are attached to a room ceiling or space wall, and a dome part which is attached to the base plate. As light emitting elements incandescent lamps, halogen lamps, but also light emitting diodes (LED) can be used. Since the light-emitting elements always radiate heat during operation, the ceiling and wall lights become warm or even hot during operation. The more the light and heat emitting lighting unit heats up, the shorter is its service life. It is therefore desirable here to provide a way to increase the life of the lighting unit.

The present invention is therefore based on the object, a light-emitting device, in particular ceiling or wall light, with at least one lighting unit, in particular an LED unit to provide, in which the life of the lighting unit over the prior art can be significantly increased.

The object is achieved for a light emitting device according to the preamble of claim 1, characterized in that the device is formed at least in two parts, wherein between the at least two parts, a gap provided and the lighting unit is arranged in the first part, said first part for discharging the heat radiated by the lighting unit comprises a number of air flow around ribs and / or pins or pins. Further developments of the invention are defined in the dependent claims.

As a result, a light-emitting device, in particular ceiling or wall light, created in which an at least two-part design is provided. Between the at least two parts, a gap is left through which air can pass. Further, a number of air flow around ribs and / or pins and / or pins is provided. Through this, a heat dissipation by convection from the interior of the light-emitting device to the outside is possible. The heat radiated by the illumination unit emitting light and heat during operation can be dissipated to the outside by the air flowing around the ribs or pins or pins from the interior of the light emitting or emitting device, ie away from the at least one heat emitting illumination unit that thereby a cooling of this can be achieved. The air flow around ribs and / or pins advantageously surround the illumination unit on all sides, so that in all directions a heat dissipation from the light-emitting device to the outside, ie in their environment, is possible. An air passage can be made through the gap provided, wherein the air flow around ribs or pins or pins in the air space generated by leaving the gap between the first and the second part of the light-emitting device protrude or are arranged in this. In the present case, ribs are understood as meaning all types of cantilevered elements which have not only a height but also a clear longitudinal extent transverse to the vertical extent. They may be straight or arbitrarily curved and / or bent and / or formed one or more angled multiple times.

In addition to the heat and light emitting lighting unit receiving the first part, a second part is provided, which may be formed as a base part and mounted under the ceiling or on the wall of a room. The light and heat emitting lighting unit receiving first part may advantageously be hinged and / or releasably connected to the base part or be. By providing an articulated connection between the first and the second part of the light-emitting device, it is possible, for example, to swap the comprehensive this first part of the ceiling or wall or the second part or base part to replace the lighting unit, replace the lighting unit and the this comprehensive first part below again - in the attachment of the light-emitting device in the form of a ceiling light up or in the form of a wall light up or down - zoom on the second or base part zoom. A further connection of the first and second part of the light-emitting device is not required if the joint provides a position fixation in the pivoted-up state of the first part to the second part. However, a fixation of the first part to the second part of the light-emitting device may be provided. The fixation can be carried out in particular via a latching device or another type of fixing device.

The gap between the base part and the light and heat emitting lighting unit comprising part may for example be 10-15 mm. Such a gap width is sufficient to supply a sufficient amount of air to the interior of the light emitting device let in and achieve the desired heat dissipation.

The ribs or pins or pins may be made of metal, in particular die-cast aluminum. Furthermore, these can be mounted on a cooling plate or connected to this to allow even better heat dissipation.

The lighting unit receiving the first part may as well as the second part, the base part, consist of a plastic, wherein the lighting unit receiving part further advantageously a light passage enabling cover, in particular dome-shaped cover comprises. The cover is for example translucent or transparent, z. B. opaque.

The at least one lighting unit can be arranged on the cooling plate on which the ribs or pins or pins are arranged, or on a further cooling plate. In particular, the at least one lighting unit is arranged on the underside of the cooling plate, while the ribs or pins or pins are arranged on its upper side. Furthermore, the at least one lighting unit may comprise light emitting diodes arranged on at least one printed circuit board. These can be arranged with the interposition of a thermal compound on this or glued there.

For contacting the at least one lighting unit, the second part, the base part, may be provided with at least one element enabling a connection, such as, for example, B. a receiving base, in the contacting elements of the lighting unit can intervene as soon as the lighting unit (s) comprehensive first part is folded onto the base part. Contacting the at least one lighting unit takes place automatically or by itself, without the need for further action to be taken. In the region of the base part, a wiring or prewiring can be provided, by which the connection enabling element is connected to the electrical power supply or can be.

To provide watertightness, seals may be provided. As a result, it is possible for electronic components and sections of the light-emitting device that can be supplied or supplied with electric power to be accommodated in a housing part which can or is sealed against ingress of water. Otherwise, water could penetrate between the first and second parts due to leaving the gap between the first and second parts. Such sealing of components to be protected against moisture or moisture of the light-emitting device may be effected, for example, by engaging the housing part in a groove provided in the second part, the base part, or by intermeshing the housing part with a counter-profile of the housing part, which on the second part is provided, or by gripping the outside of the housing part by a counter-profile on the second part of the light-emitting device. In the groove or in or on the mating profile, at least one seal can be arranged, which is the part of the light emitting device to be protected, ie the components of the light emitting device which are to be protected inside the housing part, against the ingress of moisture or moisture or water seals in the interior of the housing part.

Accordingly, when the first part comprising the at least one lighting unit and the second or base part lie on top of one another, a protective seal is achieved for the components to be protected. The air flow around ribs and / or pins or pins can be exposed to the action of moisture and moisture, so that they are arranged surrounding the housing part on the first part of the light-emitting device. By circulating with air they dry comparatively quickly even when exposed to moisture or moisture or water.

The light-emitting device can be designed as a light emitting device automatically switching on and off, ie as one that can be switched on and off by a reporting unit, in particular a high-frequency signaling unit that receives the movement of persons and, accordingly, the at least one illumination unit turns on and off. Such a reporting unit can be accommodated in particular centrally or centrally in the interior of the dome-shaped cover covering the at least one lighting unit of the first part of the light-emitting device which surrounds the at least one lighting unit, adjacent to the at least one lighting unit. For adjusting the follow-up time, the range and other adjustable properties of the automatic light-emitting device, such as a ceiling or wall light, at least one potentiometer can be provided. This can be arranged in the first part which can be folded down from the base part and which comprises at least one lighting unit. Accordingly, in order to set the potentiometer, the first part comprising it is folded away from the second or base part of the light-emitting unit, the potentiometer is adjusted and the part comprising same and the at least one lighting unit is returned to the base part pivoted or folded and possibly connected with this or fixed to this.

Furthermore, it proves to be advantageous to use a remote control device for adjusting in particular such a potentiometer and / or adjusting other features of the light-emitting device, as well as for dimming the light-emitting device or its illumination unit (s), and / or to and turn off individual lighting units. Particularly advantageous here proves to be an infrared remote control device. Furthermore, by providing a plurality of light-emitting devices in a room, in particular a corridor, switching on and off of the light-emitting devices controlled by the remote control device can be provided via such. Further, programming of the light emitting devices may be provided to programmably turn on and off. It is likewise possible to design the light-emitting devices and provide them with transmitting and receiving units such that they can communicate with one another and emit a signal to the other light-emitting devices upon detection of a movement in the region of one of the light-emitting devices, so that these also be switched on or off depending on the program. A transmission of signals can be between the individual light emitting devices z. B. by radio.

The light-emitting device may, for example, have a similar performance as conventional radiators, for example 22 watts. This corresponds to about 2000 to 2400 lumens, so that a very good cooling makes sense and can be done by a heat dissipation via convection by the number of air flow around ribs or pins or pins.

The at least one lighting unit can also be made dimmable, in particular a slow switching on and off are provided by this. Furthermore, it is possible to leave them permanently switched on with a very low brightness and to provide an increase in brightness only when detecting a movement in the detection area of the light-emitting device.

By allowing for heat dissipation via convection by providing the number of air flow around ribs or pins or pins, the life of such a light-emitting device, in particular a ceiling or wall light, compared to conventional light-emitting devices or ceiling or wall lights before all those that are provided with LEDs, be significantly increased, for example, be over five years.

For further explanation of the invention embodiments of this will be described in more detail below with reference to the drawings. These show in:

1 a side cross-sectional view through a light-emitting device according to the invention,

2 a perspective top view of the light emitting device according to 1 , in a partially sectioned view and in a plan view of the lighting units comprising part,

3a to 8th respectively. 3b and 9a to 11 perspective views of the individual assembly steps of a light-emitting device according to the invention, wherein

3a a perspective view of the mounting of a base part (first assembly step) in the light-emitting device according to 1 .

3b a perspective view of the mounting of a base part in a second embodiment of a light-emitting device according to the invention (alternative first assembly step),

4 a perspective view of the mounting of a plastic ring on the base part according to 3a (second assembly step),

5 a perspective view of a part according to the invention comprising the lighting units and air einströmbare part,

6 a perspective view of the assembly of the lighting units comprising part of the base part according to 3a (third assembly step),

7 a perspective view of the folded up on the base part, the lighting units comprising part, wherein the base part and the lighting unit comprising parts are fixed to each other by screws (fourth assembly step),

8th a side view of the fully assembled light emitting device,

9a and 9b perspective views of the assembly of the lighting unit comprising part of the base part according to 3b (alternative second assembly step),

10 a perspective view of the folded up on the base part, the lighting units comprising part, wherein the parts are fixed by screws to each other (alternative third assembly step), and

11 a perspective view of a plastic ring, according to the light-emitting device in the assembled state 10 is applied (alternative fourth assembly step) shows.

1 shows a cross-sectional view of a light-emitting device 1 in the form of a ceiling light. However, this could also be a wall lamp. It comprises a base part 2 and a lighting units 3 in the form of LEDs comprehensive lighting part 4 , The two parts 2 and 4 are together over a joint 5 or hinge articulated. This is better the 6 and 9a . 9b to take each a perspective view of the assembly steps 2 and 3 during assembly of the light emitting device 1 demonstrate. Here, each of the lighting units 3 comprehensive lighting part 4 from the base part 2 folded down at an angle α. By an arrow 6 is in 6 respectively. 9b the folding or pivoting indicated in particular by about 90 °.

The base part 2 can, as in 1 indicated by screws 7 with the ceiling 8th or the wall of a room. How better the 3a and 3b can be taken, are at the light emitting device shown there 1 four screws 7 used for attaching the respective base part 2 on the ceiling 8th - or when wall mounting a wall - are used. Like that 3a and 3b can also be taken, is the base part 2 formed substantially flat and includes, inter alia, a connection socket 9 for connecting the lighting units 3 to a power supply. The latter is in 3a . 3b however, not to be seen, nor the connection of the terminal socket 9 to such a power supply. The base part 2 can be pre-wired accordingly, after folding or swiveling up the lighting units 3 comprehensive lighting part 4 on the base part 2 and intervening on the lighting units 3 provided contacting elements in the connection socket 9 directly a contact and thus a power connection of the lighting units 3 to enable.

The base part 2 further comprises a hinge bushing 50 respectively. 150 into which a joint part 51 respectively. 151 of the joint 5 or hinge part can engage, wherein the hinge part 51 on the lighting part 4 is attached, in particular the 5 . 6 . 9a . 9b can be seen. The hinge part 51 respectively. 151 is end approximately U-shaped, possibly with end projecting portions, as in the 9a . 9b hinted, and can with this end 52 respectively. 152 in the joint socket 50 respectively. 150 intervene and hold yourself articulated. The joint bushes 50 and 150 according to the embodiments of the 3a and 3b differ in that the in 3a shown joint socket 50 clearly on the outside 24 of the base part 2 protrudes to the less strong at the top of the lighting part 4 protruding joint part 51 while the in 3b shown joint socket 150 less strong on the outside 24 of the base part 2 protruding, the hinge part 151 however, strong at the top of the lighting part 4 protrudes, like the 9a and 9b can be seen. Of course, other variants of joints can 5 or hinges for hinged connection of base part 2 and lighting part 4 be provided.

The lighting units 3 comprehensive lighting part 4 also has a number of air flow around ribs 10 on. These are especially good 5 refer to. The air flow around ribs 10 serve by convection heat, on the part of the lighting units 3 when operating as waste heat arises from the interior of the light emitting device 1 or the ceiling or wall light dissipate. To make this possible remains after the finished assembly of base 2 and the lighting units 3 comprehensive lighting part 4 A gap 11 between these two parts 2 and 4 how very good the 1 and 7 and 8th can be seen. Through this gap 11 can air into the interior of the light emitting device 1 get into there due to the distance between the two parts 2 and 4 formed airspace 12 in which the ribs 10 are arranged. Around this the air can flow around and hereby the lighting units / LEDs 3 radiate radiated heat and from the interior of the light emitting device 1 transport to the outside.

The air flow around ribs 10 are on the top 115 a cooling plate 15 arranged as the cross-sectional view in 1 can be removed. They are also adjacent in rows and partially offset from one another. Partially, they extend straight in their longitudinal direction and partially have an angled shape, such as 5 can be removed. The ribs each have a vertical extent h and a longitudinal extent l, wherein the longitudinal extent 1 usually larger than the height extension h. However, this can be different with small short ribs. In cross-section are the ribs 10 mostly narrow, as well 5 can be taken, with a different width may have, especially in the foot area 101 in that they are arranged on the cooling plate, they can be made wider than in the opposite head region 102 , Ribs 10 have a comparatively large area due to their shape. As a result, a large cooling surface is created, which can be flowed around by air, so that a particularly good heat dissipation is possible.

Like that 9a and 9b can be removed instead of or in addition to ribs 10 Pins or pins 100 provided and on the heat sink 15 be arranged. These are arranged like a brush in rows and form in the in this 9a . 9b shown embodiment, a whole field of pins or pins. The pins or pins 100 are also on the top 115 of the cooling plate 15 arranged.

Again 2 can be taken, are the LEDs 3 in segments 13 arranged. According to 2 are six segments 13 provided, each with ten LEDs 3 include. The LEDs 3 are on boards 14 arranged and glued on this over a thermal compound. The area with the LEDs 3 is provided is substantially flat, as well 2 and the cross-sectional view of the light-emitting device 1 in 1 can be taken very well. The LEDs 3 are with their boards 14 on the bottom 116 of the cooling plate 15 arranged.

In the center of the lighting units or LEDs 3 comprehensive lighting part 4 are electronic components and in particular a reporting unit 16 which may be an RF detector detecting movements in the room. To be able to record these, the coverage area of the reporting unit is 16 directed towards the room. To protect both the lighting units or LEDs 3 as well as the reporting unit 16 includes the lighting part 4 a dome-shaped cover 17 , This can consist of a plastic, as well as the base part 2 , The dome-shaped cover 17 can be translucent, in particular opaque, formed, so that although a light passage is possible, but neither the LEDs 3 still the reporting unit 16 or other components of the light emitting device 1 through the dome-shaped cover 17 can be recognized through.

To prevent water from entering the interior of the light emitting unit 1 To avoid, in particular, the electronic components 19 the light emitting device 1 in a boxy reception 20 added. The boxy reception 20 can be in a circumferential groove 21 in the base part 2 that in the 3a . 3b . 4 . 6 . 9a and 9b is implied, intervene. In the circumferential groove 21 is a seal 22 arranged, which allows a watertight seal, thus a waterproof recording of the electronic components 19 inside the light emitting device 1 ,

After mounting the base part 2 on the ceiling 8th or a room wall, as in 4 indicated, first a plastic ring 23 on the base part 2 attached, z. B. by at least one screw 25 , The plastic ring 23 on the one hand serves the outer cover and on the other hand also decorative purposes, for example, can also be specially designed in color and / or its shape.

In the third assembly step, the lighting part 4 with his joint part 51 with its approximately U-shaped end 52 in the joint socket 50 of the base part 2 be hung. As 6 and 7 can be removed, below the lighting part 4 to the base part 2 pivoted and pivoted on this example, and / or fixed, as by the screws shown 18 , The locking can already be done by contacting pins of the lighting units 3 in the connection socket 9 or openings provided therein, so that the lighting units 3 be contacted about this. Also by the intervention of the box-like recording 20 in the circumferential groove 21 that with the seal 22 can be provided, a connection between the lighting part 4 and the base part 2 respectively. Furthermore, of course, a further fixing or latching device can be provided, which is an unintentional folding down of the lighting part 4 from the base part 2 prevented. Also the joint 5 itself can already provide a locked position in which the lighting part 4 to the base part 2 is pivoted on. The after the final assembly of the light emitting device 1 visible gap 11 and visible therethrough and with air flow around ribs 10 are the side view of the light emitting device 1 in 8th refer to. At least the head areas 102 the ribs 10 (please refer 5 ) are in the airspace 12 (please refer 1 ), passing through the gap 11 is supplied with air or the air from the airspace 12 through the gap 11 outward from the light emitting device 1 can step out. Ribs 10 and / or the optionally provided pins or pins 100 Accordingly, can be flowed around by air.

In a variant of the assembly steps, the plastic ring 23 not directly after mounting the base part 2 on room ceiling 8th or a room wall mounted, but only after the installation of the lighting part 4 on the base part 2 , This variant is the 9a . 9b and 10 refer to. To 10 be lighting part 4 and base part 2 by screws 18 fixed together. As in 11 shown the alternative fourth Mounting step reproduces, the plastic ring 23 on the base part 2 , circumferentially around this attached. The assembled state then corresponds to the in 8th and in the lateral cross-sectional view according to 1 shown.

As 11 can still be seen, is the plastic ring 23 a slotted ring, so that it is not closed, but designed to be open to better around the dome-shaped cover 17 to be arranged around. Of course, in principle, a closed ring can be provided, as in 4 is shown.

For changing the follow-up time of the light-emitting device 1 or the range of the message unit 16 it is possible to provide a potentiometer or other adjustment. This or this can also be in the field of electronic components 19 or the reporting unit 16 centrally inside the light emitting device 1 are arranged, advantageously accessible after folding the lighting part 4 from the base part 2 ,

Furthermore, a remote control device, in particular an infrared remote control device, for setting such a potentiometer or other setting means for changing the follow-up time when switching on and off of the lighting units / LEDs 3 and for the response of the reporting unit 16 be provided.

Are multiple light emitting devices 1 For example, arranged in a hallway of a building, each, or at least a portion of the light-emitting devices 1 a communication unit for communicating with the other light emitting devices 1 include. For example, a transmission by radio, thus a radio transmitter and a radio receiver at or in the light emitting devices 1 be provided to the light-emitting devices tuned to each other on and off. It is particularly advantageous to program the switch-on and switch-off capability of the individual light-emitting devices 1 provided so that they can be selectively switched on and off according to the predetermined program sequence and possibly adjusted in terms of their brightness and their response successively.

In particular, a device for dimming, that is to say for the stepwise or continuous raising and lowering of the brightness of the emitted light can be provided. It is also possible to radiate only a small amount of light permanently.

In addition to the embodiments of light-emitting devices described above and shown in the figures, in particular ceiling or wall lights, as well as any combination of the features and variants mentioned can still numerous others are formed, which are each formed at least in two parts. In this case, a gap is provided between the individual parts, in which a number of air-flowable ribs and / or optionally pins or pins is arranged for heat dissipation of the heat emitted by light-emitting illumination units heat.

LIST OF REFERENCE NUMBERS

1

Light emitting device / ceiling or wall light

2

base

3

Lighting unit / LED

4

lighting part

5

joint

6

arrow

7

screw

8th

ceiling

9

connection base

10

Air-flowable rib

11

gap

12

airspace

13

segment

14

circuit board

15

heatsink

16

reporting unit

17

domed cover

18

screw

19

electronic components

20

boxy reception

21

circumferential groove

22

poetry

23

Plastic ring

24

outside

25

screw

50

joint bush

51

joint part

52

T-shaped end

100

Air flowable pins / pins

101

footer

102

head area

115

Top of 15

116

Bottom of 15

150

joint bush

151

joint part

152

The End

α

angle

H

height extension

l

longitudinal extension

Claims (10)

Light emitting device ( 1 ), in particular ceiling or wall luminaire, with at least one lighting unit ( 3 ), in particular an LED unit, characterized in that the device ( 1 ) is formed at least in two parts, wherein between the at least two parts ( 2 . 4 ) A gap ( 11 ) and the lighting unit ( 3 ) in the first part ( 4 ), this first part ( 4 ) for discharging the from the illumination unit ( 3 ) radiated heat a number of air flow around ribs ( 10 ) and / or pins or pins ( 100 ). Light emitting device ( 1 ) according to claim 1, characterized in that the air flow around ribs ( 10 ), Pins or pins ( 100 ) in which leaving the gap ( 11 ) between the first ( 4 ) and the second part ( 2 ) of the light emitting device ( 1 ) generated airspace ( 12 protrude or are arranged in this. Light emitting device ( 1 ) according to claim 1 or 2, characterized in that the air flow around ribs ( 10 ), Pins or pins ( 100 ) the lighting unit ( 3 ) surrounding, in particular surrounding on all sides, are arranged. Light emitting device ( 1 ) according to one of the preceding claims, characterized in that the second part ( 2 ) as a base part of the light-emitting device ( 1 ) and under the ceiling ( 8th ) or on the wall of a room can be mounted. Light emitting device ( 1 ) according to claim 4, characterized in that the lighting unit ( 3 ) first part ( 4 ) articulated ( 5 ) and / or releasably connectable or connected to the base part. Light emitting device ( 1 ) according to one of the preceding claims, characterized in that the air flow around ribs ( 10 ), Pins or pins ( 100 ) consist of metal, in particular die-cast aluminum. Light emitting device ( 1 ) according to one of the preceding claims, characterized in that the air flow around ribs ( 10 ), Pins or pins ( 100 ) on a cooling plate ( 15 ) are mounted or connected to this. Light emitting device ( 1 ) according to claim 7, characterized in that the at least one lighting unit ( 3 ) on the cooling plate ( 15 ), on which the ribs ( 10 ), Pins or pins ( 100 ) are arranged, or is arranged on a further cooling plate, in particular the at least one lighting unit ( 3 ) on the bottom ( 116 ) and the ribs ( 10 ), Pins or pins ( 100 ) on the top ( 115 ) of the cooling plate ( 15 ) are arranged. Light emitting device ( 1 ) according to one of the preceding claims, characterized in that for contacting the at least one lighting unit ( 3 ) the second part ( 2 ) with at least one element enabling a connection ( 9 ), in the contacting elements of the lighting unit ( 3 ) are engageable as soon as the lighting unit ( 3 ) comprehensive first part ( 4 ) to the second part ( 2 ) is worked. Light emitting device ( 1 ) according to one of the preceding claims, characterized in that a sealing of components to be protected from moisture or moisture ( 19 ) of the light emitting device ( 1 ) by engagement of the components to be protected receiving housing part ( 20 ) into one in the second part ( 2 ) groove ( 21 ) or by interlocking the components to be protected ( 19 ) receiving housing part ( 20 ) with a counter-profile of the housing part, which at the second part ( 2 ), or by gripping the components to be protected on the outside ( 19 ) receiving housing part ( 20 ) by a counter profile on the second part ( 2 ) of the light emitting device ( 1 ).

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