CENTRIFUGAL FAN MODULE AND ELECTRONIC DEVICE USING THE CENTRIFUGAL FAN MODULE

• US 20150016061A1
• Filed: 06/30/2014
• Published: 01/15/2015
• Est. Priority Date: 07/09/2013
• Status: Active Grant

• Current Assignee: ASUSTek Computer, Inc.
• Original Assignee: ASUSTek Computer, Inc.
• Inventors: WANG, Cheng-Yu
• Granted Patent: US 9,341,195 B2
• Time in Patent Office: Days
• US Class Current: 361/697
• CPC Class Codes: F04D 17/16 for displacing without appreciable compression
• CPC Class Codes: F04D 29/4226 Fan casings
• CPC Class Codes: F04D 29/582 specially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/703 specially for fans, e.g. fan guards
• CPC Class Codes: G06F 1/203 for portable computers, e.g. for laptops

Abstract

A centrifugal fan module comprising a fan housing and an impeller is provided. The fan housing includes an air inlet and a sidewall. The sidewall is pivotally disposed in the fan housing to rotate in the rotational direction relative to the fan housing. A tongue portion is formed between the sidewall and the impeller, a pressurized region is formed from the tongue portion along the rotational direction to the air outlet, the pressurized region includes a strong airflow region and the dust-discharging hole is in the strong airflow region.

Claims

1. A centrifugal fan module, comprising:

a fan housing including an air outlet and a sidewall, wherein the sidewall includes a dust-discharging hole; and

an impeller pivotally disposed in the fan housing to rotate along a rotational direction relative to the fan housing,

wherein a tongue portion is formed between the sidewall and the impeller, a pressurized region is formed from the tongue portion along the rotational direction to the air outlet, the pressurized region includes a strong airflow region, and the dust-discharging hole is in the strong airflow region.

2. The centrifugal fan module according to claim 1, wherein the strong airflow region is an area between a position that the tongue portion rotated by 180 degrees along the rotation direction and the position that the tongue portion further rotated by a predetermined angle θ

.

3. The centrifugal fan module according to claim 2, wherein the predetermined angle θ

is 40 to 50 degrees.

4. The centrifugal fan module according to claim 1, wherein the sidewall includes a first wall portion and a second wall portion, the tongue portion is between the first wall portion and the impeller, the dust-discharging hole is between the first wall portion and the second wall portion.

5. The centrifugal fan module according to claim 1, herein the centrifugal fan nodule further includes a dust-discharging flow channel, the dust-discharging flow channel is outside the fan housing and connected with the dust-discharging hole.

6. The centrifugal fan module according to claim 5, wherein the centrifugal fan module further includes an air guiding structure, the air guiding structure is outside the fan housing and connected with the sidewall, and the dust-discharging flow channel is formed between the air guiding structure and the sidewall.

7. An electronic device, comprising:

a host casing including an upper casing and a lower casing, that formed an accommodation space, the lower casing includes a plurality of exhaust holes; and

a centrifugal fan module, comprising;

a fan housing including an air outlet and a sidewall, wherein the sidewall includes a dust-discharging hole; and

an impeller pivotally disposed in the fan housing to rotate along a rotational direction relative to the fan housing, wherein a tongue portion is formed between the sidewall and the impeller, a pressurized region is formed from the tongue portion along the rotational direction to the air outlet, the pressurized region includes a strong airflow region, and the dust-discharging hole is in the strong airflow region; and

a heat dissipating fin module disposed between the exhaust holes and the and the air outlet.

8. The electronic device according to claim 7, wherein the sidewall includes a first wall portion and a second wall portion, the tongue portion is between the first wall portion and the impeller, and the dust-discharging hole is between the first wall portion and the second wall portion.

9. The electronic device according to claim 7, wherein the centrifugal fan module further includes a dust-discharging flow channel, the dust-discharging flow channel is outside the fan housing and connected with the dust-discharging hole.

10. The electronic device according, to claim 9, wherein the centrifugal fan module further includes an air guiding structure, the air guiding structure is outside the fan housing and connected with the sidewall, and the dust-discharging flow channel is formed between the air guiding structure and the sidewall.