Low-temperature LED (light emitting diode) lighting device

Abstract

The invention provides a low-temperature LED (light emitting diode) lighting device. The low-temperature LED lighting device comprises a main body case, a lamp socket arranged on the reduced end of the main body case, a substrate arranged at the opening on the enlarged end of the main body case, a plurality of LED beads, a transparent cover sheathed outside the substrate, and a drive circuit arranged on the substrate, wherein a columnar protruding part is arranged at the opening on the reduced end of the main body case, and a via-hole is formed in the axial direction of the main body case; matching threads are respectively arranged on the inner wall of the lamp socket and on the outer wall of the protruding part to realize fixed connection between the lamp socket and the protruding part; the lamp socket is connected with an external outlet through a thread formed on the outer wall of the lamp socket; and the joint between the lamp socket and the protruding part is not fixed with an adhesive so as to keep a seam for ventilation at the joint. By adopting the plurality of LED beads to substitute for a halogen lamp, the low-temperature LED lighting device provided by the invention can realize lighting in a low temperature environment, and can prolong the service life and reduce the power cost of the lighting device while reaching the brightness of the halogen lamp.

Description

technical field [0001] The invention relates to an illuminating device for illuminating in a low-temperature environment, in particular to a light-emitting diode illuminating device in a low-temperature environment. Background technique [0002] In the past, tungsten filaments were used in incandescent bulbs, and the bulbs were filled with inert gas to prevent the loss of the filaments, which was designed to prolong the service life. In the halogen lamp, the tungsten filament evaporates to produce tungsten atoms, and the evaporated tungsten atoms combine with the halogen atoms near the wall of the glass tube to form tungsten halide, and then the halogen atoms of the tungsten halide are separated from the tungsten atoms, and the tungsten atoms are regenerated Returning to the filament, due to this series of halogen cycles, the loss of the filament is prevented and the purpose of long life is achieved. [0003] However, in a halogen lamp, if the above-mentioned halogen cycle ...

AI Technical Summary

Problems solved by technology

Near the central part of the LED lamp, because it is surrounded by a large number of other LED lamp beads, the heat energy emitted from the central part of the LED lamp bead is not easy to circulate, resulting in the temperature of the LED lamp bead and its substrate near the central part and other Part of the problem is that the temperature is too high

In this way, if once the LED lamp of the prior art is used in such a low-temperature environment as inside a refrigerated warehouse, it is easier to cool down because the LED lamp beads near the periphery are close to the outside air, and the LED lamp beads near the periphery and the LED lamp beads near the center are relatively easy to cool. The temperature difference of the LED will become quite large, which will make it difficult to control the current and voltage of the LED, resulting in problems of unstable light emission and life of the LED.

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