LED lamp

Abstract

The invention discloses an LED lamp. The LED lamp comprises an LED lamp bead, a lampshade, a heat conduction apparatus for fixing the LED lamp bead and a radiator, wherein the heat conduction apparatus is provided with an air flue; the radiator comprises an electromagnet, a spring leaf, an armature, a fan blade with a flapping wing structure, a one-way flow auxiliary ring and a magnetic-control switch, wherein the electromagnet, the magnetic-control switch and a power supply form a circuit; one end of the armature is connected with the spring leaf, and the other end of the armature is connected with the fan blade with the flapping wing structure; the fan blade with the flapping wing structure is provided with a plurality of pores; and one end, close to the armature, of the one-way flow auxiliary ring is fixed to the fan blade with the flapping wing structure. After the power supply is switched on, the electromagnet attracts the armature to drive the fan blade with the flapping wing structure to move downwards, so that a seam capable of allowing air to pass through is formed between the fan blade with the flapping wing structure and the one-way flow auxiliary ring; a permanent magnet magnetic sheet on the fan blade with the flapping wing structure is in contact with the magnetic control switch, so that the circuit is switched off; under the action of the spring leaf, the armature drives the fan blade with the flapping wing structure to return, so that the circuit is switched on; and the processes are repeated. The LED lamp actively realizes one-way flow of air, so that the heat dissipation effect is achieved.

Description

technical field [0001] The invention relates to an LED lamp, in particular to an LED lamp with a cooling device. Background technique [0002] With the wide application of LEDs, more and more attention has been paid to the problem of LED heat dissipation. The quality of LED heat dissipation performance will directly affect the life of LED products. Therefore, it is imperative to solve the problem of LED heat dissipation. [0003] From the perspective of thermodynamics, the essence of LED heat dissipation is the heat exchange between the LED lamp bead and the air. The heat conduction is the medium for moving the heat out of the lamp bead. The surface of the thermal conductor then exchanges with the air by means of natural convection and radiation. Under the condition of natural convection, the heat taken away by air flow Q=Cp.M.(T2-T1), the specific heat of Cp air, the flow rate of M air, the outlet temperature of T2, and the inlet temperature of T1. It can be seen from th...

AI Technical Summary

Problems solved by technology

In order to achieve a better heat dissipation effect, an electric fan is generally used to fan the air to increase the air flow, but the electric fan needs to consume a lot of power; at the same time, the service life of the wind-driven machinery is short

Images