| 摘要 |
An LED light bulb includes a bulb housing, at least two heat sinks, an LED chip connected on each of the heat sinks, a circuit board driving the LED chip to work, a bulb base, and a bulb cap. The inner sides of the heat sinks encircle into an air cavity. Each heat sink has a first opening. The bulb base has a second opening. The first opening is exposed in the second opening to communicate with the air cavity. The top end of the bulb housing has a third opening to communicate with the air cavity. The air cavity forms up-and-down circulating convection air via the three openings. |
| 主权项 |
1. An LED light bulb, comprising
a bulb housing, at least two heat sinks, each of which discretely situated neighboring to each other on a same circumference, an LED chip, vertically oriented to be parallel to a flow of air in an air cavity, a circuit board powering the LED chip, a bulb base, and a bulb cap, an upper part thereof being connected to the bulb base, the circuit board being installed in the bulb base, a bottom of the bulb housing being connected with an upper part of the bulb base, each of the heat sinks comprising an upper part and a lower part, a bent connecting portion curving outwards to form a step integrally connected between the upper part and the lower part, the heat sinks being mounted on a circumferential portion of the bulb base around a bulb axis, the upper part being accommodated in the bulb housing, an outer side of the upper part being connected with the LED chip; the inner sides of the heat sinks encircling into the air cavity around the bulb axis, the lower part having a first opening; a side wall of the bulb base having second openings which are evenly spaced, the first opening of each heat sink communicating with the corresponding second opening; a top end of the bulb housing having a third opening; the first opening, the second openings and the third opening communicating with the air cavity for circulating up-and-down convection air. |
