Light fitting

Abstract

The invention discloses a light fitting which comprises an outer cover, an inner shell seat, a fan, a radiator and a light-emitting element, wherein the outer cover is provided with a first accommodating chamber and a first opening; the inner shell seat is provided with a second accommodating chamber and a second opening, and is additionally provided with a through hole; the through hole is communicated with the first accommodating chamber and the second accommodating chamber; the inner shell seat is arranged in the first accommodating chamber; the second opening and the first opening are opposite; an interval is formed between the outer cover and the inner shell seat so as to form an air flow passage; the fan is adjacent to the through hole; the fan is provided with two air flow circulation sides; the two air flow circulation sides are used for inhaling and blowing out air flow, so that the air flow passes the through hole; and one side of the bottom plate of the radiator faces the fan, and the other side of the bottom plate of the radiator is provided with the light-emitting element. According to the invention, preferable air flow circulation and heat dissipation efficiency can be provided so as to avoid the influences on the service life and luminous efficacy of the light fitting.

Description

technical field [0001] The present invention relates to a lamp, especially a lamp embedded in the ceiling to provide indoor or outdoor lighting. Background technique [0002] The existing embedded lamp structure, as shown in Taiwan Patent Publication No. M359644 "Lamp Heat Dissipation Device", includes a base plate, an annular heat sink, a fan and a shell cover. The substrate has two surfaces, one of which is provided with several light-emitting elements, and the other surface can be combined with the annular cooling seat, and several air holes pass through between the two surfaces of the substrate, and the fan is installed on the annular cooling seat , the shell cover is arranged on the outside of the annular heat sink and the fan and combined with the base plate, so that the surface of the base plate with the light-emitting element faces outward. Since the case cover is provided with several ventilation slots, when the fan is running, the airflow can be driven to enter th...

AI Technical Summary

Problems solved by technology

However, the space above the ceiling and the concrete floor slab of the building itself is generally closed, this space is not easy to circulate with outside air, and other items (such as pipes, lines or heat insulation materials) may be placed in this space , thus affecting its air circulation effect and heat dissipation performance

[0004] As mentioned in the previous paragraph, due to the poor heat dissipation efficiency of the existing structure, it is easy to cause the heat accumulation problem of the annular heat sink, resulting in that the heat generated by each light-emitting element cannot be smoothly removed, so that each light-emitting element and its chip are in a long time. High temperature environment affects its service life

Moreover, when the chip of each light-emitting element is overheated, it will cause light decay, which will affect the luminous efficacy of each light-emitting element.

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