US 2012/0075804 A1 · PORTABLE ELECTRONIC DEVICE AND THERMAL MODULE THEREOF

Abstract

A thermal module includes a centrifugal fan and a circuit board. The circuit board defines a through hole therein. The centrifugal fan includes a top plate located above the circuit board and aligned with the through hole, a first sidewall extending from a circumferential edge of the top plate toward the circuit board, a bottom plate located below the circuit board and aligned with the through hole, a second sidewall extending from a circumferential edge of the bottom plate toward the circuit board, and an impeller. The first sidewall abuts a top surface of the circuit board around the through hole. The second sidewall abuts a bottom surface of the circuit board around the through hole. The impeller is smaller than the through hole. The impeller extends through to be located in the through hole.

Claims20

Dependent claims

A thermal module comprising:

a circuit board defining a through hole;
a centrifugal fan comprising a casing and an impeller received in the casing, wherein the impeller is smaller than the through hole, and extends through to be located in the through hole, the casing comprising:
a top plate located above the circuit board and aligned with the through hole;
a first sidewall extending from a circumferential edge of the top plate toward the circuit board and abutting a top surface of the circuit board around the through hole;
a bottom plate located below the circuit board and aligned with the through hole;
a second sidewall extending from a circumferential edge of the bottom plate toward the circuit board and abutting a bottom surface of the circuit board around the through hole.

3 more elements

Dependencies are inferred from the claim text.

Portable electronic device and thermal module thereof

Life of this patent

Portable electronic device and thermal module thereof

Life of this patent

Abstract

Claims20