Luminaire having inner flow path

摘要

A luminaire includes a base, a light-emitting unit, and a lamp cover. The base includes a first tube part, a second tube part having an inner diameter smaller than that of the first tube part, and a joint part connected between the first and second tube parts. An inner flow path is defined by at least the first tube part, the joint part, and the second tube part in a coaxial manner. The lamp cover is fixed on the base for covering the light-emitting unit. As such, air heated by the light-emitting unit flows out of the inner flow path to thereby allow cold air to be sucked into the inner flow path.

主权项

1. A luminaire comprising:
a base including a first tube part, a second tube part, a joint part connected between said first and second tube parts, a connector, and an inner flow path defined cooperatively to extend within said first tube part, said joint part, and said second tube part in a coaxial manner between opposite first and second ends, an inner diameter of said first tube part being different from that of said second tube part, said joint part being frustoconical and being coupled to said second tube part to define a Y-shaped contour such that said inner flow path is continuously enclosed along the Y-shaped contour from said first tube part to said second tube part, said connector being disposed at said first end of said inner flow path and being formed with at least one first aperture; a light-emitting unit disposed on said outer surfaces of said second tube part and said joint part in such a manner to allow heat generated from said light-emitting unit to be transmitted onto said base and to emit light with different light emitting angles; and a lamp cover fixed on said base for covering said light-emitting unit, said lamp cover being formed with at least one second aperture; wherein, when a temperature of said base is increased as a result of the heat, heat exchange occurs between said base and air in said inner flow path to form hot air in said inner flow path, so that the hot air flows out of said luminaire through one of said first and second apertures, and cold air is sucked into said luminaire through the other one of said first and second apertures, thereby creating an inner airflow.