DE102019104038B3 - Heat sink with inserted surface elements for LED lights - Google Patents

Abstract

The invention relates to an LED lamp body (0) for an LED lamp, the LED lamp body (0) comprising: - at least one LED mounting plate (1) with an upper cooling surface (1a) and a lower mounting surface (1b) for Attachment of the LEDs (LED lighting means) and with a first edge (17a) and a second edge (17b) opposite the first edge (17a); and- (i) at least one comb-shaped connecting element (4), the at least one comb-shaped connecting element (4) having a planar side which rests on the side surface (1a) of the at least one LED mounting plate (1) facing away from the LEDs, or ( ii) the at least one LED mounting plate (1) and the at least one comb-shaped connecting element (4) form an integral workpiece, the comb-shaped side of the at least one comb-shaped connecting element being arranged on the side of the at least one LED mounting plate (1) facing away from the LEDs is, the at least one comb-shaped connecting element (4) having first grooves (5) on its side facing away from its planar side or the side corresponding to the side of the at least one LED mounting plate facing away from the LEDs, the first edge (17a) in the Is formed substantially parallel to the first grooves (5) of the at least one comb-shaped connecting element (4); and- at least one cooling fin lamella (7), the at least one cooling fin lamella (7) having a lower edge (8) and an upper edge (9), the lower edge (8) being designed to be of one of the first grooves (5 ) of the at least one comb-shaped connecting element (4) to be received, and - a cooling rib hold-down means (16) which is designed to rest on or cut into the upper edge (9) of the at least one cooling rib lamella (7) and at the first lateral edge ( 17a) or the lower mounting surface (1b) for attaching the LEDs can be fixed.

Description

The present invention relates to a lamp body, in particular for LED lamps, for applications in lamps for outdoor areas (parking lot, airport, sports field), halls (sports, industry, events, train stations), cranes, greenhouses and / or large public buildings.

There are generally heat sinks that consist of an aluminum plate with grooves into which standing cooling fins are pressed and especially glued. This creates particularly large ratios of cooling fin height and surface area to the cooling fin spacing (narrow and high fins, small spacing). For technical reasons, something like this can no longer be produced by extrusion or extrusion. As a rule, these heat sinks are cooled with a fan, since the narrow spacing of the cooling fins hinders natural convection too much.

Otherwise, in the prior art, extruded aluminum profiles are used to cool LED lights. As a rule, the profiles have cooling fin structures and a surface for the LED assembly. All structures are implemented in one component. This ensures a very good heat distribution in the luminaire body, but the access to cooling air into the cooling rib structures is restricted, especially with convection cooling.

It is an object of the present invention to provide an efficient LED luminaire which has a high cooling capacity with the lowest possible luminaire weight, the device being designed for natural convection cooling and the cooling capacity being variable.

• - mindestens eine LED-Montageplatte mit einer oberen Kühlfläche und einer unteren Montagefläche zur Anbringung von LED-Leuchtmitteln sowie mit einer ersten Kante und eine der ersten Kante gegenüberliegende zweite Kante; und
• - (i) mindestens ein kammförmiges Verbindungselement, wobei das mindestens eine kammförmige Verbindungselement eine planare Seite hat, die auf der den LED-Leuchtmittel abgewandten Seitenfläche der mindestens einen LED-Montageplatte aufliegt, oder (ii) die mindestens eine LED Montageplatte und das mindestens eine kammförmige Verbindungselement ein integrales Werkstück bilden, wobei die kammförmige Seite des mindestens einen Verbindungselementes auf der den LED-Leuchtmitteln abgewandten Seite der mindestens einen LED Montageplatte angeordnet ist, wobei das mindestens eine kammförmige Verbindungselement auf seiner von seiner planaren Seite abgewandten Seite oder der Seite, die der LED-Leuchtmitteln abgewandten Seite der mindestens einen LED-Montageplatte entspricht, erste Nuten aufweist, wobei die erste Kante im Wesentlichen parallel zu den ersten Nuten des mindestens einen kammförmigen Verbindungselementes ausgebildet ist; und

• - mindestens eine Kühlrippenlamelle, wobei die mindestens eine Kühlrippenlamelle eine untere Kante und eine obere Kante aufweist, wobei die untere Kante dazu ausgebildet ist, von einer der ersten Nuten des mindestens einen kammförmigen Verbindungselements aufgenommen zu werden, und
• - ein Kühlrippenniederhaltemittel, das dazu ausgebildet ist, auf der oberen Kante der mindestens einen Kühlrippenlamelle aufzuliegen oder einzuschneiden und an der seitlichen ersten Kante oder der unteren Montagefläche zur Anbringung der LED-Leuchtmitteln abgekürzt als LEDs bezeichnet, festlegbar ist.

The object of the present invention is achieved by an LED lamp body for an LED lamp, the LED lamp body comprising:

• - At least one LED mounting plate with an upper cooling surface and a lower mounting surface for attaching LED lighting means and with a first edge and a second edge opposite the first edge; and
• - (i) At least one comb-shaped connecting element, the at least one comb-shaped connecting element having a planar side which rests on the side face of the at least one LED mounting plate facing away from the LED lighting means, or (ii) the at least one LED mounting plate and the at least one Comb-shaped connecting element form an integral workpiece, the comb-shaped side of the at least one connecting element being arranged on the side of the at least one LED mounting plate facing away from the LED lighting means, the at least one comb-shaped connecting element on its side facing away from its planar side or the side that corresponding to the side of the at least one LED mounting plate facing away from the LED lighting means, has first grooves, the first edge being formed essentially parallel to the first grooves of the at least one comb-shaped connecting element; and

• - At least one cooling rib lamella, the at least one cooling rib lamella having a lower edge and an upper edge, the lower edge being designed to be received by one of the first grooves of the at least one comb-shaped connecting element, and
• - A cooling rib hold-down means which is designed to rest or cut into the upper edge of the at least one cooling rib lamella and which is abbreviated to LEDs for attaching the LED lighting means, can be fixed on the first lateral edge or the lower mounting surface.

The device is advantageously designed for natural convection cooling. Compared to the state of the art, the introduction of heat is taken over by connecting elements with smaller dimensions. In return, the access to cooling air is improved.

It is generally the case that when using highly thermally conductive aluminum alloys of the 6000 series or copper for the construction of LED housings, the cooling surface and the free air convection are the limiting factors for the cooling performance and not the heat transfer into the cooling fins. Due to the three-part construction of the LED luminaire body, consisting of a) base plate / mounting plate for LED, b) free-standing cooling fins / cooling plates and c) a connecting element for heat transfer between the LED mounting plate and the cooling plates, the LED luminaire body becomes an efficient heat sink that is optimally designed for natural convection cooling.

Heat sinks with vertical fins on a horizontal LED mounting plate have poorer cooling properties than with a vertical arrangement of the LED mounting plate and cooling fins, since the natural convection in the gaps between the cooling fins is hindered. Forced air flow (ventilator / blower) is sometimes necessary in order to dissipate the heat from the surfaces of the cooling ribs, particularly when the cooling fins are close together and high. These limitations omitted when the LED mounting plate is omitted, because cool air can then approach the cooling fins from below and rise between the cooling fins through a convection flow and dissipate the heat. When the LED mounting plate is separated from the cooling fins, a heat-conducting connection must be created between the LED mounting plate and the cooling fins in order to transfer the heat from the LED mounting plate to the cooling fins. According to the invention, this is done by comb-like connecting elements which are fastened to the LED mounting plate with a flat, ground surface, in particular screwed, and on the other hand accommodate the cooling fins with heat-conducting surface contact between the comb-like structures.

The ability to vary the cooling capacity is guaranteed by the modular linkage and any combination of the construction elements of the LED luminaire body. Different dimensions of the lamp and the cooling surfaces can be achieved in this way. The adaptation consists in the fact that the components only have to be cut to different lengths during production from extruded profiles or have to be combined with one another in different proportions (e.g. fewer cooling fins with otherwise the same equipment, if less cooling surface is required, or fewer connecting elements at high ambient temperatures of the luminaire if only a little heat has to be transferred, but the cooling surface has to be very large).

A luminaire made of simple components and scalable in its external dimensions is provided. On the one hand, several separate luminaire modules can be combined in one luminaire; on the other hand, the dimensions of the individual modules and, independently of this, also the cooling capacity can be adapted to a large extent continuously.

The cooling capacity is adjusted continuously by lengthening or shortening the cooling fins in the longitudinal direction via the LED mounting plate and / or in small steps by increasing or reducing the connecting elements in the transverse direction via the LED mounting plate, so that additional cooling fins can be inserted. This enables the cooling capacity to be adjusted independently of the LED mounting surface. The process can produce exceptionally large heat-dissipating cooling surfaces. Due to the increased cooling capacity, the LEDs can be kept at a lower operating temperature. This increases the efficiency of the LED (defined as the luminous flux per electrical power used).

Due to the flexibility in the positioning and quantity and size of the LED mounting plates with different LED illuminants, scaling and flexible adaptability of the installed light output (the luminous flux) is guaranteed.

An essential feature of the construction is that a yoke-like structure is arranged above the cooling fins and opposite the connecting elements, with which the cooling fins and also the connecting elements are fixed in relation to the base plate and through which the entire cooler structure is pressed onto the base plate in a thermally conductive manner.

As a result, a permanent mechanical connection between the structural elements of the lamp body is not required. The plug-in system thus provides an LED light as a modular system with exchangeable and reusable components.

According to one embodiment it is provided that the cooling fin hold-down means is a wire spring or in several parts and comprises a spring element with a hold-down element which form the cooling-fin hold-down means.

One possibility of permanently fixing the cooling fins in the grooves / receptacles of the connecting elements in a thermally conductive manner is to use a wire clip or wire spring with a spring characteristic (e.g. with spiral spring elements). The wire clip or wire spring preferably has a convex pretension, so that the central cooling ribs are contacted first when the clip is attached and then the other cooling ribs are contacted during the final fixation. In any case, a resilient and flexible fixation of the cooling ribs in the connecting element is necessary so that small manufacturing tolerances can be compensated, which lead to the cooling ribs sticking to different depths in the grooves / receptacles of the connecting element.

According to one embodiment, the spring element has a first arcuate recess at its first end and a second arcuate recess at its second end, the first arcuate recess being designed to connect with a third groove pressed into the edge of the at least one LED mounting plate .

The yoke is preferably placed on top of the cooling ribs with one or two cutting edges, a comb or a spring construction and the whole is then pressed against the lower comb or the base plate with spring force or with screws. A hinge or folding function is necessary, but can also be implemented.

As a result, a flexible, hinge-like mechanical connection between the spring element and the at least one LED mounting plate can be implemented in an advantageous manner by simple tilting.

According to one embodiment it is provided that the cooling rib hold-down means has a bolt and / or a rivet, the bolt and / or the rivet being designed to be received by the second arcuate recess of the spring element, the hold-down element being designed to have at least one To hold the cooling fin lamella at its upper edge in one of the first grooves of the comb-shaped connecting element.

In a preferred embodiment, the cooling rib hold-down means comprises a hold-down element, which in turn is laterally or in the direction of the center of the hold-down element by wire springs, spring elements, screws or other mechanical fixings, which are in particular attached symmetrically on the hold-down element and the mounting plate and / or on the connecting element, around the cooling fins to connect thermally conductive with the connecting element.

In an alternative, the bolt can be rotatably mounted in the second arcuate recess of the spring element, so that a simple swivel joint is realized around which the hold-down element can be rotated at one end. After the hold-down element has been turned up around this swivel joint, e.g. Cooling fin fins are removed from the grooves of the connecting element and replaced.

According to one embodiment, the at least one comb-shaped connecting element has a second web at at least one of its ends, the second web being designed to be received by one of the at least two opposing first and / or second edges of the LED mounting plate.

Slipping of the comb-shaped connecting element against the LED mounting plate is prevented, so that the respective connecting element does not have to be screwed to the LED mounting surface, but only has to be pressed against the LED mounting plate by the hold-down element. The individual components of the LED luminaire body can thus be exchanged.

According to one embodiment it is provided that the hold-down element has at least one cutting edge parallel to its longitudinal axis on the lower edge of the hold-down element.

A hold-down element with one or more cutting edges is attached opposite the connecting element so that the cutting edge comes to rest on the upper edge of the cooling rib lamellae. The cutting edge and the connecting element are pressed against one another by one or more screws and preferably by springs or resilient clips. The cutting edge works its way into the thin upper edges of the cooling fins. As a result, all cooling fins are pressed down into the grooves / receptacles of the connecting element. The cutting edge compensates for any slight differences in height between the cooling fins because it first works its way into the higher ribs, but then also makes contact with the lower ribs. The penetration of the cutting edge can occur during assembly e.g. be supported by a hydraulic system.

According to one embodiment, the spring element comprises at least one leaf spring, at least one wire spring and / or at least one spiral spring.

As a result, a close heat-conducting contact of the heat-conducting components is supported in an advantageous manner by means of bracing.

Grooves or channel-shaped structures to which the clips and tongues can be attached are also pressed in during the production of the base plate as an extruded profile and during the production of the connecting elements. This saves mechanical work steps that are otherwise required for fastening (drilling holes, attaching hooks, etc.).

Two connecting elements clamp the cooling fins from two sides, one of the elements is used to connect to the LED mounting plate. The two connecting elements are basically identical with a comb-like toothing. The element that is not connected to the LED mounting plate can have a lower (lighter) construction (e.g. as a plastic injection-molded profile) with otherwise the same geometry.

Fasteners that are required for structural, non-heat-conducting tasks can be made of plastic. These connecting elements have the same comb structure as the heat-conducting connecting elements.

According to one embodiment, the at least one comb-shaped connecting element and the at least one cooling fin lamella comprise at least one thermally conductive copper alloy and / or an aluminum alloy and / or a thermally conductive ceramic such as silicon carbide or aluminum nitride, in particular at least one aluminum alloy from the 1000 series and / or the 6000 series.

As a result, the comb-shaped connecting element and the at least one cooling rib lamella are made of a highly thermally conductive material that is optimized for heat dissipation.

According to one embodiment it is provided that the at least one comb-shaped connecting element can be produced by an extrusion process with subsequent sawing to the required length.

Other processes (e.g. CNC milling, punching, forging, extrusion, casting) are also possible, but are likely to be less economical.

The connecting elements have a rectangular or square cross-section with a width of 8-50 mm, preferably 15-25 mm, and a height of 5-25 mm, preferably 10-15 mm. (The width corresponds to the cut length of the extrusion profile).

The distance between the connecting elements for heat dissipation above the LED mounting plate is 30-200 mm, preferably 50-70 mm. Any spacing outside the LED mounting plate is possible. The length of the connecting elements is 10-260 mm, preferably 60-130 mm. With a length of 10 mm, only one cooling fin can be attached.

In an alternative embodiment, the total height of the connecting elements is 5 - 70 mm, preferably 10-40 mm, of which 5-25 mm, preferably 6-15 mm are allotted to a web, measured from the base to the deepest point of the comb-like toothing. The height of the toothing above the web (or the depth of the grooves) is 2 - 30 mm, preferably 8 - 25 mm.

The connecting elements can be produced by various methods, for example as an extruded aluminum profile (preferred) as an extruded aluminum profile, as an aluminum injection-molded profile, by forging or punching or as a plastic injection-molded profile or as a milled part made from various materials. The components of the luminaire can also be made from thermally conductive and - in the case of components that do not serve to conduct heat - also from non-thermally conductive plastics.
The connecting elements can be attached to all positions of the luminaire (on the side, on the top). The attachment is preferably carried out in such a way that the cooling fins are vertical in the final installation position of the lamp. The connecting elements can take the form of a rectangular frame or can be attached on one side.

When using ceramics and thermally conductive plastics, corresponding manufacturing processes are used.

The connecting elements can be made in one piece or in several pieces. In the multi-part design, several narrower connecting elements are arranged side by side. In the borderline case, the connecting element carries only one cooling rib or a single cooling rib has individual connecting elements at defined intervals. Several of these combined cooling elements are then placed in parallel on the back of the LED mounting plate and pressed onto the mounting plate in a thermally conductive manner using the techniques described elsewhere.

According to one embodiment, the at least one cooling rib lamella comprises an extruded profile or sheet metal and, in the case of a ceramic, a sheet-like surface element, with the pressing direction of the extruded profile being parallel or perpendicular to the comb structure of the at least one comb-shaped connecting element.

Correspondingly, changes in thickness or profiling of the cooling fin lamellae in the finished luminaire can take place in two different spatial directions.

The cooling fins can have a flat, sheet-like cross section or the cross section is profiled. The cooling ribs, the pressing direction of which is parallel to the pressing direction of the connecting elements, preferably have a wedge-shaped fit to the connecting elements. The slope of the wedge is 1: 5 to 1:25. Outside the wedge-shaped fit, the cooling fins can have smooth or corrugated surfaces.

In this way, sheet metal or sheet-like extruded profiles can be bundled into a lamellar structure with a high surface area as a cooling element for LED lights.

The cooling fins can protrude laterally over the LED mounting plate to enlarge the cooling surface. This is done in the longitudinal direction by installing longer cooling fins in the connecting elements (preferred) and / or in the transverse direction by protruding the connecting elements with inserted cooling fins beyond the surface of the LED mounting plate. Conversely, the cooling surface can also be reduced according to the same principles if less cooling is required.

According to one embodiment it is provided that the at least one cooling fin lamella has an axis that runs from the lower edge to the upper edge, the angle between the axis of the at least one cooling fin lamella in the inserted state and the LED mounting surface is 90 to 45 degrees or, as an alternative, the angle can be 90 to 70 degrees.

This arrangement is recommended if the main direction of radiation of the LED is not perpendicular to the LED mounting plate.

Preferred cooling fin fins form a rectangle in the area. Alternatively, they can also be designed as another polygon and / or a semicircle.

The at least one cooling rib lamella can also be a surface element of any shape.

According to one embodiment, it is provided that the at least one comb-shaped connecting element is dimensioned so that the temperature difference between the LED mounting plate and the at least one cooling fin lamella during operation of the LED light ( 7th ) 1 to 4 degrees Celsius, preferably below 2.5 degrees Celsius.

Example calculation: With a rib spacing of 10 mm and a width of the connecting element of 15 mm, the cross-section of the heat-transferring structure for the cooling rib is 10 x 15 mm = 1.5 square centimeters. With a height of the connecting element of 13 mm to the lower edge of the cooling rib, this cross-section enables the transfer of a heat quantity of 5 watts with a temperature gradient of 2 degrees Celsius.

According to one embodiment, the thickness of the at least one cooling fin lamella is 1 to 5 mm, preferably 2 to 3 mm, the thickness of the at least one cooling fin lamella decreasing as the distance from the at least one comb-shaped connecting element increases.

The geometry of the at least one cooling fin lamella thus follows the requirements for effective heat dissipation.

According to one embodiment it is provided that the shape of the first groove of the at least one comb-shaped connecting element ( 4th ) is wedge-shaped, in particular with a pitch ratio of 1: 5 to 1:25, the at least one cooling fin lamella having a corresponding, precisely fitting wedge shape on its lower edge.

As a result, a connection between the connecting element and the cooling rib can be realized in an advantageous manner only by simply inserting the surface element of the cooling rib lamella into the corresponding groove of the comb-shaped connecting element.

If the extrusion tolerance for both the cooling rib and the groove of the connecting element is plus / minus 50 µm (i.e. 100 µm together) and a pitch of 1: 5 has been selected for both components, the setting depth of the rib can be increased by plus / minus 0.5 mm fluctuate.

The bottom of the groove or the lower edge of the cooling rib are preferably round or have rounded edges.

According to one embodiment, the contact areas between the at least one comb-shaped connecting element and the at least one cooling fin lamella comprise 1 to 5 times the area of the contact area between the comb-shaped connecting element and the LED mounting plate, preferably 2 to 3 times the area.

This information applies both to the construction as a whole and to each individual cooling fin and the associated portion of the connecting element. As a result, the contact areas between the heat-dissipating components are advantageously maximized.

According to one embodiment it is provided that the at least one LED mounting plate comprises aluminum alloys and / or copper alloys, in particular the thickness of the at least one LED mounting plate being 5 to 15 mm, preferably 6 to 12 mm, the shape of the at least one LED -Mounting plate is rectangular, square, round, oval or any free shape.

Because the LED mounting plate comprises aluminum alloys and / or copper alloys, the LED mounting plate is highly thermally conductive and can contribute to the removal of heat. The LED mounting plate can merge with the comb-shaped connecting element to form an integral part. The LED mounting plate is very thin, so that weight can be saved. The cross section of the LED mounting plate can have any shape, so there are no limits to the design options for LED lights.

The LED mounting plate is preferably manufactured as an extruded profile, which is then sawn off to the appropriate length.

The connecting elements and the LED mounting plate can have mechanical structures (e.g. bars and grooves) with which they can be positioned against one another and secured against displacement. This is particularly advantageous if a connection is chosen by clips and springs and not by screws.

Furthermore, the invention relates to an LED lamp comprising a lamp body, the LED lamp further comprising at least one LED lamp and at least one electrical line, at least one power supply unit and / or a power supply connection, the lamp or the lamp being made of a sheet metal or a plastic cover, the light output of the LED lamps being greater than 10,000 Im, and the LED lamp being cooled only by natural convection, and the cooling output being greater than 50 watts, the LED lamp being an industrial lamp, Railway light, hall light, parking lot light or airport light.

The construction is suitable for creating a so-called light bar. Separate LED mounting plates are only connected to one another by the cooling fins. This is done either through the entirety of the cooling fins or only through individual cooling fins. In this design, the luminaire body is very narrow (for example 100 mm) and at the same time very long (for example 1500 mm). The electrical wiring is adapted to the design, i.e. One control device is used per light strip module and the light strip modules are electrically connected to one another in such a way that the power supply for the control devices is fed through the modules. The cooling capacity is extremely high, so that LEDs can be operated at low temperatures and therefore with a higher degree of efficiency. This design is particularly suitable for greenhouses or so-called "horticulture", where light is used for the production process and therefore there is a direct relationship to the production costs.

Further details, features and advantages of the invention emerge from the drawings and from the following description of preferred embodiments with reference to the drawings. The drawings merely illustrate exemplary embodiments of the invention, which do not restrict the essential inventive concept.

Figure list

• 1 shows an LED lamp body 0 comprising an LED mounting plate 1 , at least one comb-shaped connecting element 4th , at least one cooling fin 7th and a cooling fin hold-down means 16 .
• 2 shows the cooling fin hold-down means 16 comprising a hold-down element 12th and a spring element 10 , especially a leaf spring 10 , wherein the hold-down element 12th a cutting edge 15th includes.
• 3 shows a hold-down element 12th comprising two cutting edges 15th .
• 4th shows a wire spring 10 as cooling fin hold-down means 16 .
• 5a, b and c each show a lamp body 0 with another connecting element 19th on the top edge 9 of the at least one cooling fin lamella 7th .
• 6 represents a connection group a consisting of the hold-down element 12th and the connecting element 4th .
• 7a and 7b show a performance form with cooling fins that are inclined at an angle of 45 degrees.

Embodiments of the invention

1 shows an LED lamp body 0 comprising an LED mounting plate 1 , at least one comb-shaped connecting element 4th , at least one cooling fin 7th and a cooling fin hold-down means 16 .

The at least one connecting element 4th is one-piece, two-piece (as shown) or multi-piece. The at least one connecting element 4th has a planar side that it faces on the LED mounting plate 1 rests, on the side facing away from the LEDs 1a .

On the side face 1b the LEDs are mounted (not shown). The at least one connecting element 4th has a second web on its planar side 23 and a third bridge 24 on what it is with first edges 17a and / or second edges 17b the at least one LED mounting plate 1 is tilted and forms a non-slip connection, so that the at least one connecting element 4th not on the LED mounting plate 1 Has to be screwed, but only has to be pressed on in order to be stable with its planar side on the LED mounting plate 1 to lie on.

The at least one connecting element 4th has first grooves on its side facing away from the planar side 5 and first bars 2 on. In at least one of the first grooves 5 at least one cooling fin lamella is a perfect fit 7th with its lower edge 8th applicable. The bottom of the first grooves 5 or the lower edge 8th the cooling fins 7th are preferably rounded.

A cooling fin fin 7th is only in one of the first grooves 5 inserted or pushed in. The at least one cooling fin lamella is held firmly by the direction of the LED mounting plate 1 aligned pressure of a cooling fin hold-down means 16 , which in Figure is a hold-down element 12th and a spring element 10 includes. The spring element 10 is essentially parallel to the at least one cooling fin lamella 7th arranged, the longitudinal axis being parallel to the axis leading from the lower edge 8th to the top edge 9 of the at least one cooling fin lamella 7th runs. The hold-down element 12th is arranged with its longitudinal axis parallel to the LED mounting surface, the longitudinal axis of the hold-down element 12th substantially perpendicular to the longitudinal axis of the spring element 10 stands.

The hold-down element 12th has a cutting edge 15th parallel to its longitudinal axis on the lower edge of the hold-down element 12th on. With this edge 15th presses the hold-down element 12th against the top edges 9 of the at least one cooling fin lamella 7th and fixes the respective cooling fin lamella 7th in the first slot 5 of the comb-shaped connecting element 4th . At the same time, the comb-shaped connecting element 4th against the side face 1a the LED mounting plate 1 pressed and also fixed.

The spring element 10 , in this case a leaf spring 10 , points to its first, the LED mounting plate 1 facing end a first arcuate recess 11 and on its second, from the LED mounting plate 1 remote end a second arcuate recess 3 on. The first arched indentation 11 is designed to have one of the laterally pressed-in third grooves 14th the LED mounting plate 1 enter into a reversible mechanical connection.

The hold-down element 12th points to his the spring element 10 facing end a bolt 13th on which of the second arcuate recess 3 of the spring element 10 is recorded. The bolt 13th can in the second arcuate recess 3 of the spring element 10 be rotatably mounted. The hold-down element 12th could around the bolt 13th be turned around. However, the bolt serves to fix the hold-down element and to prevent the hold-down element from tilting. The cooling fin hold-down means 16 can thus by rotating the hold-down element 12th around the bolt 13th are opened around so that the at least one cooling fin fin 7th from one of the first grooves 5 of the comb-shaped connecting element 4th can be removed and / or replaced.

In one embodiment, the first grooves run 5 conical to a more tight fit of the at least one cooling fin lamella 7th in one of the first grooves 5 to achieve.

In a further embodiment, hooks on the LED mounting plate enable 1 Clamping components against the LED mounting plate 1 .

• - mindestens eine LED-Montageplatte 1, wobei die mindestens eine LED-Montageplatte 1 an ihren Rändern mindestens eine erste Kante 17a und eine zweite Kante 17b aufweist,
• - mindestens ein kammförmiges Verbindungselement 4, wobei das mindestens eine kammförmige Verbindungselement 4 mit seiner planaren Seite auf der den LEDs abgewandten Seitenfläche 1b der LED-Montageplatte 1 aufliegt, wobei das mindestens eine kammförmige Verbindungselement 4 auf seiner von seiner planaren Seite abgewandten Seite erste Nuten 5 aufweist, wobei das mindestens eine kammförmige Verbindungselement 4 an mindestens einem seiner Enden einen zweiten Steg 23 aufweist, wobei der zweite Steg 23 dazu ausgebildet ist, von der ersten Kante 17a der LED-Montageplatte 1 aufgenommen zu werden, wobei das mindestens eine kammförmige Verbindungselement 4 an seinem anderen Ende einen dritten Steg 24 aufweist, wobei der dritte Steg 24 dazu ausgebildet ist, von der zweiten Kante 17b der LED-Montageplatte 1 aufgenommen zu werden;
• - mindestens eine Kühlrippenlamelle 7, wobei die mindestens eine Kühlrippenlamelle 7 eine untere Kante 8 und eine obere Kante 9 aufweist, wobei die untere Kante 8 dazu ausgebildet ist, von einer der ersten Nuten 5 des kammfömigen Verbindungselements 4 aufgenommen zu werden,

• - mindestens ein Federelement 10, wobei das mindestens eine Federelement 10 eine erste bogenförmige Vertiefung 11 und eine zweite bogenförmige Vertiefung 3 aufweist, wobei die erste bogenförmige Vertiefung 11 dazu ausgebildet ist, mit einer dritten Nut 14 der LED-Montageplatte 1 eine Verbindung einzugehen,
• - ein Niederhalterelement 12, wobei das Niederhalterelement 12 einen Bolzen 13 und/oder eine Niete aufweist, wobei der Bolzen 13 und/oder die Niete dazu ausgebildet ist, von der zweiten bogenförmigen Vertiefung 3 des mindestens einen Federelements 10 aufgenommen zu werden, wobei das Niederhalterelement 12 dazu ausgebildet ist, mindestens eine Kühlrippenlamelle 7 an dessen oberer Kante 9 in einer der ersten Nuten 5 des kammförmigen Verbindungselements 4 zu halten. Vorzugsweise wird das eine Niederhalteelement 12 von zwei Federelementen 10, die gegenüberliegend auf beiden Seiten des Niederhalteelementes angeordnet werden, auf die Oberkante der Kühlrippen gepresst. Dadurch erhalten die Kühlrippen einen festen Sitz in den Nuten des Verbindungselementes 4.

In summary, the 1 represents: an LED luminaire body 0 for an LED lamp, the LED lamp body being 0 includes:

• - at least one LED mounting plate 1 , wherein the at least one LED mounting plate 1 at least one first edge at their edges 17a and a second edge 17b having,
• - At least one comb-shaped connecting element 4th , wherein the at least one comb-shaped connecting element 4th with its planar side on the side face facing away from the LEDs 1b the LED mounting plate 1 rests, wherein the at least one comb-shaped connecting element 4th on its side facing away from its planar side, first grooves 5 having, wherein the at least one comb-shaped connecting element 4th a second web at at least one of its ends 23 having, the second web 23 is designed for this purpose from the first edge 17a the LED mounting plate 1 to be received, wherein the at least one comb-shaped connecting element 4th at its other end a third bridge 24 having, the third web 24 is designed for this purpose from the second edge 17b the LED mounting plate 1 to be accepted;
• - At least one cooling fin lamella 7th , wherein the at least one cooling fin fin 7th a lower edge 8th and an upper edge 9 having, the lower edge 8th is designed to be one of the first grooves 5 of the comb-shaped connecting element 4th to be accepted

• - At least one spring element 10 , wherein the at least one spring element 10 a first arcuate recess 11 and a second arcuate recess 3 having the first arcuate recess 11 is designed to have a third groove 14th the LED mounting plate 1 to establish a connection
• - a hold-down element 12th , wherein the hold-down element 12th a bolt 13th and / or comprises a rivet, the bolt 13th and / or the rivet is designed to be separated from the second arcuate recess 3 of the at least one spring element 10 to be added, the hold-down element 12th is designed to have at least one cooling fin lamella 7th at its upper edge 9 in one of the first grooves 5 of the comb-shaped connecting element 4th to keep. This is preferably a hold-down element 12th of two spring elements 10 that are opposite on both sides of the hold-down element are arranged, pressed onto the upper edge of the cooling fins. This gives the cooling fins a firm seat in the grooves of the connecting element 4th .

Basically, the cooling fins are in the grooves of the connecting elements and cannot tilt. In order for the thermal connection to work properly, the cooling fins must be pressed into the grooves. This is done by the hold-down element, such as an overhead comb, a spring construction or, thirdly, by the cutting edges. The aim is to press all ribs down, even if they are at different heights due to tolerances. The cutting edge is best suited for this. Regardless of this, each of the three hold-down elements must be pressed down as fastening elements on both sides in order to fulfill its function. For the sake of clarity, only one spring has been drawn. But with a one-sided clamping, the construct would not work because there is no contact pressure. If there is only one cutting edge on one side, the yoke as a hold-down element does not have sufficient stability and is wobbly to the right and left. The cross bolt stabilizes this. The construction with 2 cutting edges stands securely on the cooling fins. However, the specific contact pressure is also halved.

2 shows the cooling fin hold-down means 16 comprising a hold-down element 12th and a spring element 10 , especially a leaf spring 10 , wherein the hold-down element 12th a cutting edge 15th includes.

Opposite the connecting element 4th (not shown) becomes a hold-down element 12th with a cutting edge 15th attached so that the cutting edge is on the top edge 9 a cooling fin fin 7th comes to rest. The cutting edge 15th is due to the tension of the lateral leaf spring in the upper edge 9 of the at least one cooling fin lamella 7th pressed. The cutting edge works its way 15th into the thin upper edges 9 of the cooling fins 7th a. This will remove all cooling fin fins 7th down into the first grooves / recordings 5 of the comb-shaped connecting element 4th pressed. The cutting edge 15th compensates for any slight differences in height between the cooling fins 7th because it first works its way into the higher ribs, but then also contacts the lower ribs. The penetration of the cutting edge 15th can be supported during assembly e.g. by a hydraulic system.

A pressed-in bolt 13th at one end of the hold-down element 12th is the attachment point for a leaf spring 10 or other spring. This also prevents the hold-down element from tipping over to the side 12th prevented.

3 shows a hold-down element 12th comprising two cutting edges 15th for fixing the cooling fin fins 7th . The hold-down element 12th has two along the longitudinal axis of the hold-down element 12th parallel cutting edges 15th on. The overall function of the two cutting edges 15th is like a cutting edge 15th . From two cutting edges the hold-down element is safe from tilting. The bolt of the single-edged design can be omitted and the hold-down element is pressed onto the cooling fins by two leaf springs or alternatively by two helical springs. For fastening the spring element 10 a different construction is required. Instead of a bolt, a fourth groove is pressed into one end 18th which is for engagement with the second arcuate recess 3 of the spring element 10 suitable is.

4th shows a wire spring 10 as cooling fin hold-down means 16 . The curve above is supposed to be the preload of the wire spring 10 represent.

A wire spring 10 replaces the hold-down element 12th and the spring element 10 , especially the leaf spring 10 , and performs the same function: the wire spring 10 pushes through your bias with its middle part 23 on the respective upper edge 9 the respective cooling fin lamella 7th and presses them into the respective first groove 5 of the comb-shaped connecting element 4th .

In the longitudinal legs 24 the wire spring 10 additional spring elements (e.g. a spiral) can be installed to increase the pressure on the cooling fins.

5a, b and c each show a lamp body 0 with another comb-shaped connecting element 19th on the top edge 9 of the at least one cooling fin lamella 7th .

The further comb-shaped connecting element 19th sits with its fifth grooves 20th on the top edge 9 of the at least one cooling fin lamella 7th on ( 5b) so that a tight fit of the at least one cooling fin lamella 7th given is ( 5c ). The further comb-shaped connecting element is attached 19th in one embodiment by means of a screw connection 21a on a base plate above in the LED luminaire body 0 . In a further embodiment, the further comb-shaped connecting element has 19th a laterally pressed sixth groove at at least one of its ends 22a on, by means of which a fastening of the further comb-shaped connecting element 19th takes place by means of a clamp and / or a tensioning screw or a spring.

In one embodiment, the comb-shaped connecting element also has 4th a screw connection 21b by means of which it is firmly attached to the LED mounting plate 1 is firmly screwed. In one embodiment, the comb-shaped connecting element 4th a laterally pressed sixth groove 22b on, by means of which a fastening of the comb-shaped connecting element 4th by means of a clamp and / or a tensioning screw or a spring on the further comb-shaped connecting element 19th he follows.

In both embodiments, the further comb-shaped connecting element takes over 19th a hold-down function: the cooling fins 7th are through the further comb-shaped connecting element in the first grooves 5 of the comb-shaped connecting element pressed ( 5c ), especially if a spring element 10 between the at least one laterally pressed sixth groove 22a further comb-shaped connecting element 19th and the at least one laterally pressed sixth groove 22b of the comb-shaped connecting element 4th is clamped.

6 represents a connection group a consisting of the hold-down element 12th and the connecting element 4th . Both elements are pressed together to form the cooling fin fins 7th to fix thermally conductive. There is also a liaison group b shown, comprising the connecting element 4th and the mounting plate 1 . Both components are pressed together to conduct heat.

Screws and spring elements (leaf springs and spiral springs) are possible as “pressing” elements (not shown). The "pressing" elements can be used in any combination over any distance. For example “spring element a and spring element b” or “screw c” or “screw a and spring element c”.

Both spring elements and screws are either located between the cooling fins or outside the cooling fins and, furthermore, screws and spring elements are always symmetrically distributed, that is, they are arranged either in the middle or in pairs at the same distance from the center. Compression can take place by connecting the components of connecting group a and / or b and also by combining the components of a and b.

7a and 7b show a performance form with cooling fins that are inclined at an angle of 45 degrees. The inclination is determined by the orientation of the grooves in the connecting elements 4th given.

List of reference symbols

0

Luminaire body

1

LED mounting plate, 1a upper mounting surface, 1b lower mounting surface

2

first bridge

3

second arcuate recess

4th

comb-shaped connecting element

5

first groove

6

second groove

7th

Cooling fin

8th

lower edge

9

upper edge

10

Spring element, leaf spring, wire spring

11

first arcuate recess

12th

Hold-down element

13th

bolt

14th

third groove

15th

Cutting edge

16

Cooling fin hold-down means

17a, b

first and second edges

18th

fourth groove

19th

another comb-shaped connecting element

20th

fifth groove

21a, 21b

Screw connection

22a, 22b

sixth groove

23

second bridge

24

third bridge

Claims (11)

LED lamp body (0) for an LED lamp, the LED lamp body (0) comprising: - at least one LED mounting plate (1) with an upper cooling surface (1a) and a lower mounting surface (1b) for attaching LED Lighting means as well as having a first edge (17a) and a second edge (17b) opposite the first edge (17a); and - (i) at least one comb-shaped connecting element (4), wherein the at least one comb-shaped connecting element (4) has a planar side on the side facing away from the LED lighting means Side surface (1a) of the at least one LED mounting plate (1) rests, or (ii) the at least one LED mounting plate (1) and the at least one comb-shaped connecting element (4) form an integral workpiece, the comb-shaped side of the at least one comb-shaped Connecting element is arranged on the side facing away from the LED lighting means of the at least one LED mounting plate (1), the at least one comb-shaped connecting element (4) on its side facing away from its planar side or the side facing away from the LED lighting means corresponds to at least one LED mounting plate, having first grooves (5), the first edge (17a) being formed essentially parallel to the first grooves (5) of the at least one comb-shaped connecting element (4); and - at least one cooling fin lamella (7), the at least one cooling fin lamella (7) having a lower edge (8) and an upper edge (9), the lower edge (8) being designed to be of one of the first grooves (5 ) of the at least one comb-shaped connecting element (4) to be received, and - a cooling rib hold-down means (16) which is designed to rest or cut into the upper edge (9) of the at least one cooling rib lamella (7) and to cut into the first lateral edge ( 17a) or the lower mounting surface (1b) for attaching the LED lamps can be fixed. LED light body (0) after Claim 1 , characterized in that the cooling fin hold-down means (16) comprises a wire spring or a spring element (10) with a hold-down element (12), which form the cooling-fin hold-down means (16), in particular is multi-part and comprises a spring element (10) with a hold-down element (12) which form the cooling fin hold-down means (16). LED light body (0) after Claim 2 , characterized in that the spring element (10) has a first arcuate recess (11) at its first end and a second arcuate recess (3) at its second end, the first arcuate recess (11) being designed to have an am At the edge of the at least one LED mounting plate (1), the third groove (14), in particular the pressed-in third groove (14), to establish a connection. LED light body (0) after one of the Claims 1 to 3 , characterized in that the cooling rib hold-down means (16) has a bolt (13) and / or a rivet, the bolt (13) and / or the rivet being designed to be separated from the second arcuate recess (3) of the spring element (10) to be received, the hold-down element (12) being designed to hold at least one cooling rib lamella (7) on its upper edge (9) in one of the first grooves (5) of the at least one comb-shaped connecting element (4). LED light body (0) after one of the Claims 1 to 4th , characterized in that the comb-shaped connecting element (4) has a second web (23) at at least one of its ends, the second web (23) being designed to be from one of the at least two opposing first and / or second edges (17a , b) the at least one LED mounting plate (1) to be added. LED light body (0) after one of the Claims 1 to 5 , characterized in that the hold-down element (12) has at least one cutting edge (14) parallel to its longitudinal axis on the lower edge (15) of the hold-down element (12). LED light body (0) after one of the Claims 1 to 6 , characterized in that the spring element (10) comprises at least one leaf spring, at least one wire spring and / or at least one spiral spring. LED light body (0) after one of the Claims 1 to 7th , characterized in that the at least one comb-shaped connecting element (4) and the at least one cooling rib lamella (7) comprise at least one thermally conductive copper alloy and / or an aluminum alloy and / or a thermally conductive ceramic such as silicon carbide or aluminum nitride, in particular at least one aluminum alloy from the 1000 series and / or the 6000 series. LED light body (0) after one of the Claims 1 to 8th , characterized in that the at least one cooling rib lamella (7) comprises an extruded profile or sheet metal and, in the case of a ceramic, a sheet-like surface element, in particular the pressing direction of the extruded profile being parallel or perpendicular to the comb structure of the comb-shaped connecting element (4). LED light body (0) after one of the Claims 1 to 9 , characterized in that the at least one cooling fin lamella (7) has an axis which runs from the lower edge (8) to the upper edge (9), the angle between the axis of the at least one cooling fin lamella (7) in the inserted state and the LED mounting surface (1) is 90 to 45 degrees. LED lamp comprising a lamp body (0) according to one of the Claims 1 to 10 , characterized in that the LED light further comprises at least one LED light source, and at least one electrical line, at least one power supply unit and / or a power supply connection, wherein the lamp or the lamp is surrounded by a sheet metal or plastic shell, the light output of the LED lamp is greater than 10,000 Im, and the LED lamp is only cooled by natural convection, and the cooling capacity is greater than 50 watts , the LED light being an industrial light, train light, hall light, parking lot light or airport light.

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