Heat dissipating module having auxiliary fan

Patent metadata

Field	Value
Publication number	US-11304331-B1
Application number	US-202017060064-A
Country	US
Kind code	B1
Filing date	Sep 30, 2020
Priority date	Sep 30, 2020
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A heat dissipating module includes a heat dissipating assembly, a centrifugal fan, an airflow guiding hood and an auxiliary fan. The heat dissipating assembly includes a heat dissipating board and fins disposed thereon. Heat dissipating channels are formed between the fins. The centrifugal fan is disposed at a side of the heat dissipating channels. The airflow guiding hood covers the heat dissipating assembly and the centrifugal fan and is provided with a first airflow opening over the centrifugal fan, a second airflow opening over the fins and a third airflow opening at another side of the heat dissipating channels. The auxiliary fan is disposed between the fins and the second airflow opening.

First claim

What is claimed is:

1. A heat dissipating module comprising:
a heat dissipating assembly, comprising a heat dissipating board and fins disposed thereon, and heat dissipating channels being formed between the fins, wherein the fins are formed with a recess portion downward from a top thereof;
a centrifugal fan disposed at a side of the heat dissipating channels, wherein an inside of the recess portion has an L-shaped inner wall adjacent to the centrifugal fan;
an airflow guiding hood, covering the heat dissipating assembly and the centrifugal fan, and provided with a first airflow opening over the centrifugal fan, a second airflow opening over the fins and a third airflow opening at another side of the heat dissipating channels;
an auxiliary fan disposed between the fins and the second airflow opening, wherein the auxiliary fan is received in the recess portion, and the auxiliary fan is a down-blowing axial fan; and
a partition disposed between the auxiliary fan and the fins and attached on the L-shaped inner wall.

2. The heat dissipating module of claim 1 , wherein two ends of each heat dissipating channel have a first passing opening and a second passing opening, each first passing opening is arranged correspondingly to the centrifugal fan, and each second passing opening is arranged correspondingly to the third airflow opening.

3. The heat dissipating module of claim 2 , wherein the auxiliary fan is aslant arranged relative to the heat dissipating board in a manner gradually increasing height from the first passing openings to the second passing openings.

4. The heat dissipating module of claim 3 , wherein the recess portion has a slant bottom which gradually increases height from the first passing openings to the second passing openings, and the auxiliary fan is fixed on the slant bottom.

5. The heat dissipating module of claim 1 , wherein the heat dissipating board is a thermos-conductive block or a vapor chamber.

6. The heat dissipating module of claim 1 , further comprising a bottom plate, wherein the heat dissipating board and the centrifugal fan are mounted on the bottom plate, the bottom plate is formed with an aperture exposing the heat dissipating board, the airflow guiding hood covers and is fixed to the bottom plate, and the airflow guiding hood is extended with an airflow blocking plate abutting against the bottom plate and disposed at a side of the centrifugal fan, which is located apart from the heat dissipating assembly.

Assignees

• Taiwan Microloops Corp

Inventors

• Lin Chun-Hung

Classifications

• H05K7/20154 Primary

  Heat dissipaters coupled to components · CPC title

• G06F1/20 Primary

  Cooling means · CPC title

• H05K7/20409

  Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing · CPC title

• H05K7/20145

  Means for directing air flow, e.g. ducts, deflectors, plenum or guides · CPC title

• H05K7/2029

  using a liquid coolant with phase change in electronic enclosures (in cabinets of standardized dimensions H05K7/20536; in server cabinets H05K7/20709; in vehicle electronic casings H05K7/20845; in power control electronics H05K7/2089; in displays H05K7/20954) · CPC title