LED exterior and street lamps
An LED exterior and street lamp (luminaire) is provided with an LED operating chamber and a functional chamber each hermetically sealed and interconnected to each other in a thermally-isolated manner at their narrow end faces, the chambers being surrounded by a cooling surface which can be replaced externally on the housing of the chambers and can be adapted in terms of surface area.
1. An LED exterior or street luminaire configured for direct connection to an exterior pole or a home or building connection cable, comprising
a hermetically sealed first housing configured to form an operating space for an LED module assembly, the LED module assembly being received in the first housing,
a hermetically sealed second housing configured to form a functional space for functional devices, the functional devices being received in the second housing and comprising AC power operating devices and AC power connecting terminals,
wherein
the two housings are mechanically connected to one another at an end wall of the first housing, the end wall being of sufficiently smaller area than lateral walls of the first housing so as to thermally substantially decouple the operating space from the functional space,
respective outwardly extending flanges are formed around a periphery or at least on opposed lateral walls of the housings adjacent lower extremities of the walls of the housings, and
a planar web of heat conductive material forming a cooling surface of predetermined area rests on the flanges and is detachably connected to and in thermal communication with the lateral walls or the lateral walls and end walls of the housings by way of tabs and is configured to be interchangeable with other like constructed cooling surfaces.
2. The LED luminaire according to claim 1 , wherein an end portion of the second housing overlies an end portion of a roof of the first housing and the second housing is provided with downwardly extending webs which engage the end portion of the roof of the first housing thereby to provide a space between the end portion of the second housing and the end portion of the roof of the first housing which the end portion of the second housing overlies which space further thermally substantially decouples the operating space from the functional space.
3. The LED luminaire according to claim 2 , further comprising insulating material in the space.
4. The LED luminaire according to claim 1 , wherein the first and second housings each have a respective roof, the roof of the second housing is higher than the roof of the first housing, the functional space defined by the second housing partially overlies the operating space defined by the first housing and at a portion of the second housing overlying the first housing the second housing is fastened to the first housing by screws extending into the operating space and oriented perpendicularly to a length of the functional space.
5. The LED luminaire according to claim 1 , further comprising a first sealed cable feedthrough for an AC power supply line, the first sealed cable feedthrough communicating between the operating space and the functional space and comprising a first pressure equalization valve.
6. The LED luminaire according to claim 5 , further comprising a second sealed cable feedthrough for an AC power supply line, the second sealed cable feedthrough communicating between the ambient and the functional space and comprising a second pressure equalization valve.
7. The LED luminaire according to claim 6 , wherein the first and second pressure equalization valves are so configured that the effective volumetric flow rate per unit time through the second pressure equalization valve is greater than that of the first pressure equalization valve.
8. The LED luminaire according to claim 1 , wherein the lateral walls and the end walls of the housings flare outwardly at a predetermined angle so that width and length of each of the housings is greater at a bottom thereof than at a roof thereof and the tabs are bendable and are preformed with an angle of inclination sufficiently smaller than the angle at which the walls of the housings flare outwardly so that when the planar web of heat conductive material is assembled with the housings, the tabs bend to conform to the angle at which the walls flare outwardly so as to press firmly against surfaces of the walls of the housings in a planar manner.
9. The LED luminaire according to claim 8 , wherein surface areas of the lateral walls of the housings are in engagement with the tabs.
10. The LED luminaire according to claim 8 , wherein surfaces of at least three mutually adjoining walls of the first housing are in engagement with the tabs.
11. The LED luminaire according to claim 1 , wherein the first housing comprises, at a bottom thereof, a hermetically sealed cover configured for passing therethrough of illumination from the LED module, wherein the cover is detachable from the rest of the first housing.