DE202014100998U1 - LED light and LED lights battery - Google Patents

Abstract

LED light (1) with - an extruded profile (2) running in the longitudinal direction (10) as the housing of the light (1) with - a groove (3) which runs in the longitudinal direction (10) and is open to the outside and in which several LEDs (4 ) are arranged one behind the other in the longitudinal direction (10), - cooling fins (5) running in the longitudinal direction (10) on at least part of the remaining outer surfaces (6) of the profile (2), - at least one opening on both sides in the longitudinal direction (10) Flow channel (7) for cooling air and - a fan (8) in or in front of the flow channel (7).

Description

I. Field of application

The invention relates to an LED light

II. Technical background

LED lights are becoming increasingly popular, firstly because of the long life of the light-emitting diodes (LEDs) used therein, and secondly because of the compact design of the corresponding lights, which is possible because of the very small LEDs.

A typical disadvantage of conventional lights with other bulbs is that the known bulbs such as light bulb, neon lamp, xenon bulbs etc. generally emit light in all directions uniformly and for a directed light emission, a complex design of the reflector was necessary, but then again led to uneven light levels in the respective impact area of the light, so no more uniform illumination caused.

Thus, for example, the achievement of a very elongated, approximately linear, illumination surface is difficult to achieve, and in particular with uniform light density per area hardly.

In addition, it is essential for certain lighting situations that everywhere the incident light quantity per area is the same size, for example in commercial applications such as test equipment, such as crash test systems for the automotive industry and the like.

Another disadvantage of lights with conventional bulbs is that they not only bulky build, but also have a relatively high weight in relation to the desired performance.

The seal against moisture is problematic.

III. Presentation of the invention

a) Technical task

It is therefore an object of the invention to provide a compact and easy and inexpensive to produce LED lamp, and a lamp battery using these lights.

b) Solution of the task

This object is solved by the features of claims 1 and 17. Advantageous embodiments will be apparent from the dependent claims.

Due to the structure of the lamp essentially only - except the LEDs and their electrical wiring - an extruded profile and possibly a fan in the minimum equipment, LED lights according to the invention can be made extremely simple and yet with variable length and light intensity:
To vary the light intensity, the power and / or the distance and / or the number of LEDs are selected as desired, and to change the length of the LED light only the quasi endless available extruded profile must be cut to the desired length.

Preferably, as LEDs so-called COB (Chip On Board) LEDs are used, which are already available at a very low price with high performance and have a very low height, and therefore can be easily mounted on the correspondingly wide groove bottom, particularly easy by simple sticking with a heat-resistant, thermally conductive adhesive.

The wiring of the LEDs, for example, by a along the groove extending in the longitudinal direction of the wire or two wires that can be led out of the groove on the front side, so that not even cross-drilling or other processing of the extruded profile are needed.

As a rule, this LED light - depending on its place of use and purpose - still be completed by a few other components:
Thus, in each case an end cover arranged on the end face of the extruded profile, preferably screwed, which should also cover the end face of the groove, in which the LEDs are located, with.

This end cap can also be used to fix the LED light to the environment by the end cap have corresponding fastening devices, be it a cranked projection or a pivot axis to the LED light relative to a housing or a bracket about its longitudinal direction to fix.

Due to the fact that in such an LED light on a relatively compact lamp of about 30 cm in length and a cross-sectional profile of 12 × 6 cm quite electrical power of several 100 watts are consumed, one of which is not Insignificant part is converted into heat, a large amount of heat must be dissipated by the compact luminaire housing, namely the extruded profile.

For this purpose, it is very advantageous that can be incorporated by the design as an extruded profile on all longitudinal outer sides of the profile already in the production of cooling fins, and even in the interior of the flow channel inwardly directed cooling fins.

If the heat removal by convection alone at these cooling fins is not sufficient, the fan is provided, which promotes air through the longitudinal flow channel, the heat decreases and dissipates from the inner peripheral surfaces of the flow channel. The fan may be used for this purpose in one of the two front ends of the flow channel or be mounted on the outside of the end cover and bolted together with this on the extruded profile.

This design is particularly preferable when in the inner cross-section of the flow channel inwardly projecting cooling fins are, as in the arrangement of the fan in the flow channel over a certain longitudinal region otherwise these cooling fins. would have to be removed consuming by milling.

The ventilation duct is preferably a completely enclosed by the extruded profile cross-section, preferably with a round cross-section, as this ensures an optimally large removal of heat from the extruded profile.

Although a flow channel with a cross-section which is slightly open at least to one side is easier to produce as an extruded profile, its heat dissipation is reduced.

The outwardly open side of the groove, in which the LEDs are located, is usually covered by a translucent cover, usually made of acrylic glass, on the one hand to protect the LEDs from mechanical damage and moisture, on the other hand by a frosted design of the Cover the desired light scattering can be effected and / or a corresponding light color can be generated by a colored cover.

The covers are preferably simply inserted in longitudinal guides formed in the extruded profile, and can be positively secured therein by the end covers projecting beyond the end face of the covers.

Both end cover and cover can be tight against water or moisture, depending on the desired level of tightness, so the purpose of the lamp.

The attachment of the end cover can be done in a simple manner by the screwing of the end cover by means of screws in the open end side of correspondingly formed Schraubnuten, which are also formed extending in the extruded profile in the longitudinal direction.

A particularly simple production of such screw grooves in the production of an extruded profile is possible in that the screw grooves are not completely enclosed by the extruded profile grooves, but to the outside of which are open grooves, for example, the distances between the cooling fins can also be used as screw grooves before especially when they have a restriction to the groove bottom spaced.

Preferably, the LED light also includes a temperature sensor that measures the temperature of the extruded profile. As a result, it is possible for a corresponding controller to switch the fan on and off depending on the measured temperature, and possibly even to control its speed, so that the fan does not have to run permanently.

The usually required for an LED lamp ballast can be present together with the extruded profile in a surrounding housing or, for example, the U-shaped bracket for the extruded profile, but also be mounted offside.

In order to ensure a corresponding light guide, has the groove in which the LEDs are inclined, preferably concave curved flanks.

Since the shape of these flanks should be different depending on the purpose, replaceable flank inserts can be used, which can be inserted or inserted before applying the cover in the groove and, for example, can be made of a sheet metal channel profiles, which only at the positions of the LED recesses have.

As a rule, the extruded profile and thus the lamp will be straight in the longitudinal direction.

For certain applications, namely, if you want to achieve a very long, narrow light area, such as street lights, it may be useful that the front of the LED light, in which is the groove with the LEDs is curved in the side view or angled.

This can be achieved even with the use of an extruded profile in a very simple manner that instead of a one-piece extruded profile of the main body of the LED lamp consists of several longitudinally adjoining pieces of the same extruded profile, but not in alignment, but at an angle to each other , so mitred cut.

If the ends of the LED luminaire thus produced nevertheless have mutually parallel end faces, such an angled LED light can also be attached very easily via corresponding pivot pins about its longitudinal axis in a housing.

From several of the described or otherwise produced elongated LED lights can be easily made an LED lights battery by several of the elongated LED lights are arranged in parallel side by side.

By these individual LED lights are each separately pivotable about their longitudinal direction in the overall housing and can be achieved by means of such a lighting battery in a simple manner by adjusting the tilt angle of the individual LED lights can be achieved that a situation to be lit, For example, a crash station for car crash tests, can be illuminated in the desired manner, for example, by everywhere in the area to be illuminated, the approximately same light density is achieved.

For this purpose, the individual LED lights are preferably dimmable independently and therefore also have separate ballasts. The ballasts can all be placed together in a housing remote from the LED lights battery, for example in a 19 "housing.

The overall housing is preferably an open housing of the type of, for example, a retaining bracket to improve the heat dissipation of the lights. If, on the other hand, a box-shaped overall housing is desired as the overall housing, this preferably consists of perforated metal sheets.

c) embodiments

Embodiments according to the invention are described in more detail below by way of example. Show it:

1a : an LED light without end cover,

1b a side view angled LED light,

2 : the extruded profile in front view,

3a : a LED lights battery viewed in the longitudinal direction of each LED lights,

3b : the LED lights battery in the top view on the front and

4 : an operational situation of such a LED luminaire battery.

1a shows a perspective view of an LED lamp according to the invention 1 , but in a relatively short embodiment: As the body serves the extruded profile 2 as it is in 2 is shown in detail in its cross section and is available almost endlessly.

How best by the 2 it can be seen, is the cross section of the extruded profile 2 approximately rectangular and has on its one outer side, usually a narrow side, an outwardly open groove 3 in which later the multiple LEDs 4 longitudinal 10 spaced one behind the other and wired.

Others, preferably all others, outsides of the extruded profile 2 are with cooling fins 5 occupied, which serve the LEDs produced by the and in the extruded profile 2 - Which is usually made of aluminum - dissipate heat introduced.

Since this alone is often insufficient on the outer cooling fins, the extruded profile has in its interior a likewise extending in the longitudinal direction flow channel 7 through which cooling air in the longitudinal direction along the extruded profile 2 can flow, usually transported by one only in the 3a shown, in front or in the front of this flow channel 7 arranged electric fan 8th ,

To also in the flow channel 7 the heat transfer from the extruded profile 2 to optimize the flow of cooling air, protrude from the inner circumference of the flow channel 7 which has a circular cross-section here, cooling fins 5 ' inside.

The groove 3 can - as in the left image area - an obliquely rising edge to the outside 3a own or as in the right part of the image a perpendicular to the open outside extending edge 3b ,

The sloping flank 3a It is used to control the light coming from the LED at the bottom of the groove 4 is emitted to radiate at a relatively wide angle, since the flanks 3a , b quasi serve as a reflector and specify the shape of the emitted light cone.

In order to be able to vary this shape more easily, as shown in the right-hand half of the figure, it is possible to make a large-surface-shaped groove 3 , for example, with the vertical flanks 3b , a flank insert 18 be used, the z. B. consists of sheet metal and can also be mirrored on its front, and has such a defined curvature on its front that the desired beam angle, ie lighting cone is achieved.

Such a flank insert 18 preferably extends over the entire width of the groove 3 and is with its lateral edges in corresponding cuts 17 the groove 3 longitudinal 10 simply inserted and has at the positions where the LEDs 4 are present, recesses. The same cuts 17 and / or an unillustrated additional incision may be used to provide a cover 9 as they are in 1a already drawn over the open side of the groove 3 to place to protect the LEDs 4 ,

2 also shows around the flow channel 7 around a total of four screw channels distributed 19 in the form of completely enclosed with respect to the cross section, in the longitudinal direction 10 running passages that are dimensioned to be a later on the end face of the extruded profile 2 attached end cover 13 by means of z. B. self-tapping screws in these screw channels 19 can be screwed into it.

Preferably, the screw channels 19 however, outwardly open, undercut grooves, as between two adjacent cooling fins 5 can be formed, as in the middle of the bottom 2 represented, since this can be easier to produce in an extruded profile.

1b shows in the side view, so primarily transverse to the longitudinal direction 10 , an LED light 1 that differ from that of 1a differs in that it is double-angled in the side view.

This can be done despite using the same extruded profile 2 be achieved in a simple manner that in this case a central portion and two lateral sections of the extruded profile are each mitred and assembled and thus give a double-angled in the side view contour with a double angled front surface in which the groove with the LEDs located.

As a result, the direction of emission of the LEDs of this lamp 1 not the same in all places, but different in the three sections.

As a result, a particularly long, narrow illuminated area can be achieved, for example when used as a street lamp a long piece of a narrow foot or bike path with only one LED light 1 be illuminated.

In 1b are also on the front sides of the extruded profiles 2 existing body applied end cover 13 to recognize, by means of which the main body about a pivot axis 10 ' in the longitudinal direction 10 runs, opposite the free ends of a U-shaped retaining bracket 15 is pivotable, the one from the extruded profiles 2 existing body of the LED light 1 wearing.

In the connecting leg of the U-shaped retaining bracket 15 is also required for the LED lamp usually required electrical ballast 12 arranged.

Furthermore, in this case has the extruded profile 2 , preferably in this case the middle extruded profile 2 , via a temperature sensor 16 which controls the measured temperature 14 reports, depending on the in 1b invisible fan 8th controls, so on and off and possibly changed in its speed, and thereby the through the flow channel 7 the amount of air delivered varies for the purpose of cooling.

The 3a and b show one of a plurality of parallel, in particular inventive LED lights 1 manufactured luminaire battery 20 where the individual LED lights 1 in a case-shaped in this case, open at the front, the overall housing 11 are arranged.

The side by side parallel LED lights 1 are each separately - as in 3b visible - around a pivot axis 10 ' in the longitudinal direction 10 the individual LED lights 1 runs, in the overall housing 11 swiveling and preferably separately dimmable, therefore preferably also equipped with separate ballasts.

4 shows a typical application of such a lamp battery 20 :
If this lights battery 20 For example, the illustrated cuboid with the outer surfaces 21a , b is to illuminate, and - which is often the case with technical lighting - it is desired that on these two surfaces 21a , b everywhere about the same light density is present, although in the course of the surfaces, their distance from the lamp battery 20 changes, this can be done with the illustrated lighting battery 20 be achieved in a very simple manner by the individual LED lights 1 be pivoted so that the desired illumination and light density per unit area is achieved by partial or complete superimposition of the light cone.

For this purpose, the lights must 1 be positioned with their longitudinal direction only transversely to the decreasing distance.

LIST OF REFERENCE NUMBERS

1

LED light

2

Extruded profile, profile

3

groove

3a, b

flanks

4

LED

5, 5 '

cooling fin

6

outer surface

7

flow channel

8th

Fan

9

cover

10

longitudinal direction

10 '

swivel axis

11

total housing

12

ballast

13

End covers

14

control

15

headband

16

temperature sensor

17

cuts

18

edge application

19

screw

20

LED lights battery

21a, b

area

Claims (19)

LED light ( 1 ) with - one in the longitudinal direction ( 10 ) extending extruded profile ( 2 ) as the housing of the lamp ( 1 ) with - one in the longitudinal direction ( 10 ) extending outwardly open groove ( 3 ), in which several LEDs ( 4 ) longitudinal ( 10 ) are arranged one behind the other, - in the longitudinal direction ( 10 ) extending cooling fins ( 5 ) on at least part of the remaining external surfaces ( 6 ) of the profile ( 2 ), - at least one longitudinally ( 10 ) running, frontally open on both sides flow channel ( 7 ) for cooling air and - a fan ( 8th ) in or in front of the flow channel ( 7 ). LED lamp according to claim 1, characterized in that the LEDs are so-called COB (Chip On Board) LEDs. LED light according to one of the preceding claims, characterized in that the groove ( 3 ) with the LEDs ( 4 ) from a translucent cover ( 9 ), in particular a frosted or colored cover ( 9 ), is covered, in particular waterproof and / or inserted in longitudinal guides. LED light according to one of the preceding claims, characterized in that the extruded profile ( 2 ) end of, in particular sealing, end covers ( 13 ), which in particular on the extruded profile ( 2 ) in designated Schraubnuten ( 3 ) are bolted. LED light according to one of the preceding claims, characterized in that as Schraubnuten ( 3 ) the distances between two cooling fins ( 5 ) are formed. LED light according to one of the preceding claims, characterized in that the LED light ( 1 ) a headband ( 15 ), which is in particular U-shaped and in which the extruded profile ( 2 ) about its longitudinal direction ( 10 ) is pivotable and fixable in any position. LED light according to one of the preceding claims, characterized in that the LED light ( 1 ) at least one temperature sensor ( 16 ), which determines the temperature of the extruded profile ( 2 ) measures. LED light according to one of the preceding claims, characterized in that the light ( 1 ) a controller ( 14 ), which depends on the temperature sensor ( 16 ) measured temperature the fan ( 8th ) turns on and / or off. LED light according to one of the preceding claims, characterized in that the LED light ( 1 ) a ballast ( 12 ), which in particular on the headband ( 15 ) is attached. LED light according to one of the preceding claims, characterized in that all in the longitudinal direction ( 10 ) outer surfaces ( 6 ) of the extruded profile ( 2 ) except the groove ( 3 ) with the LEDs ( 4 ) of cooling fins ( 5 ) are covered. LED light according to one of the preceding claims, characterized in that the LEDs ( 4 ) along the bottom of the groove ( 3 ), longitudinal ( 10 ) are spaced and in particular glued. LED light according to one of the preceding claims, characterized in that the groove ( 3 ) inclined, concavely curved, flanks ( 3a , b). LED light according to one of the preceding claims, characterized in that the flanks ( 3a , b) are formed by exchangeable flank inserts ( 18 ), which are secured in their position in particular form-fitting by the cover ( 9 ) and / or plugging into corresponding longitudinal ( 10 ) incisions ( 17 ) in the groove ( 3 ). LED light according to one of the preceding claims, characterized in that in the inner circumference of the flow channel ( 7 ) Cooling fins ( 5 ' ) are arranged. LED light according to one of the preceding claims, characterized in that the flow channel ( 7 ) one of the extruded profile ( 2 ) has completely enclosed, in particular circular, inner contour or the flow channel ( 7 ) one to the outside of the profile ( 2 ) is an open longitudinal groove closed by a flow cover. LED light according to one of the preceding claims, characterized in that in the side view on the longitudinal direction ( 10 ) the extruded profile ( 2 ) has a curved or one or more angled front side, in which the groove ( 3 ), and in particular from a plurality of adjoining segments in angles of the extruded profile ( 2 ) consists. LED lights battery ( 20 ) with - an overall housing ( 11 ), - several parallel juxtaposed therein, elongated LED lights ( 1 ), in particular according to one of the preceding claims, - each in its longitudinal direction ( 10 ) arranged one behind the other several LEDs ( 4 ) bear, characterized in that - the LED lights ( 1 ) in the overall housing ( 11 ) each one parallel to its longitudinal direction ( 10 ) running pivot axis ( 10 ' ) are pivotable and lockable. LED lights battery ( 20 ) according to claim 17, characterized in that the individual LED lights ( 1 ) are dimmable independently of each other and in particular via separate ballasts ( 12 ) feature. LED lights battery ( 20 ) according to claim 17 or 18, characterized in that the overall housing ( 11 ) is an open overall housing or in a box-shaped overall housing ( 11 ) consists of perforated plates.

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