Dual fan with increased air flow

Patent metadata

Field	Value
Publication number	US-12385495-B2
Application number	US-202418420314-A
Country	US
Kind code	B2
Filing date	Jan 23, 2024
Priority date	Jan 23, 2024
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A dual fan system includes a first fan that produces a first airflow, and a second fan that produces a second airflow. An air duct includes first and second nozzles, and first and second channels. The first channel directs the first airflow into an area between the first and second nozzles. The second channel directs the second airflow into the area between the first and second nozzles. The first and second airflows combine in the second nozzle to create an output airflow.

First claim

What is claimed is:

1. A dual fan system comprising:
a first fan to produce a first airflow;
a second fan to produce a second airflow;
an air duct in physical communication with both the first and second fans, the air duct including:
first and second nozzles;
a first channel in physical communication with an outlet of the first fan, wherein the first channel directs the first airflow into an area between the first and second nozzles;
a second channel in physical communication with an outlet of the second fan, wherein the second channel directs the second airflow into the area between the first and second nozzles, wherein the first and second airflows combine in the second nozzle to create an output airflow.

2. The dual fan system of claim 1 , further comprising:
a first sloped section extending away from the exit of the first channel; and
a second sloped section extending away from the exit of the second channel, wherein the first and second sloped section direct the output airflow out of the dual fan system.

3. The dual fan system of claim 2 , wherein the first sloped section includes a first opening at a neck of the second nozzle and the second sloped section includes a second opening at the neck of the second nozzle, wherein the first and second openings expose the first and second airflows to ambient air.

4. The dual fan system of claim 3 , wherein a low-pressure region near the first opening pulls a third airflow into the air duct, and a second low pressure region near the second opening pulls a fourth airflow in the air duct.

5. The dual fan system of claim 4 , wherein an addition of the third and fourth airflows increases an amount of airflow in the output airflow and decreases a pressure level of the output airflow.

6. The dual fan system of claim 1 , further comprising a heat sink in physical communication with the air duct.

7. The dual fan system of claim 1 , wherein a gap is located between the first and second fans, wherein the first and second airflows pull a third airflow from the gap into the air duct via the first nozzle.

8. The dual fan system of claim 7 , wherein an addition of the third airflow increases an amount of airflow in the output airflow and decreases a pressure level of the output airflow.

9. The dual fan system of claim 1 , wherein a neck of the second nozzle is at a same location as an exit of the first nozzle.

10. A dual fan system comprising:
a first fan to produce a first airflow;
a second fan to produce a second airflow;
an air duct in physical communication with the first and second fans, the air duct including:
first and second nozzles;
a first channel in physical communication with an outlet of the first fan, wherein the first channel directs the first airflow into an area between the first and second nozzles;
a second channel in physical communication with an outlet of the second fan, wherein the second channel directs the second airflow into the area between the first and second nozzles, wherein a gap is located between the first and second fans, wherein the first and second airflows pull a third airflow from the gap into the air duct via the first nozzle, wherein the first, second, and third airflows combine in the second nozzle to create an output airflow; and

a heat sink in physical communication with the air duct.

11. The dual fan system of claim 10 , further comprising:
a first sloped section extending away from the exit of the first channel; and
a second sloped section extending away from the exit of the second channel, wherein the first and second sloped section direct the output airflow out of the dual fan system.

12. The dual fan system of claim 11 , wherein the first sloped section includes a first opening at a neck of the second nozzle and the second sloped section includes a second opening at the neck of the second nozzle, wherein the first and second openings expose the first and second airflows to ambient air.

13. The dual fan system of claim 12 , wherein a low-pressure region near the first opening pulls a fourth airflow into the air duct, and a second low pressure region near the second opening pulls a fifth airflow in the air duct.

14. The dual fan system of claim 13 , wherein an addition of the fourth and fifth airflows increases an amount of airflow in the output airflow and decreases a pressure level of the output airflow.

15. The dual fan system of claim 10 , wherein an addition of the third airflow increases an amount of airflow in the output airflow and decreases a pressure level of the output airflow.

16. The dual fan system of claim 10 , wherein a neck of the second nozzle is at a same location as an exit of the first nozzle.

17. An information handling system comprising:
a processor; and
a dual fan system in physical communication with the processor, the dual fan system including:
a first fan to produce a first airflow;
a second fan to produce a second airflow;
an air duct in physical communication with both the first and second fans, the air duct including:
first and second nozzles;
a first channel in physical communication with an outlet of the first fan, wherein the first channel directs the first airflow into an area between the first and second nozzles;
a second channel in physical communication with an outlet of the second fan, wherein the second channel directs the second airflow into the area between the first and second nozzles, wherein the first and second airflows combine in the second nozzle to create an output airflow; and

a heat sink in physical communication with the air duct and with the processor.

18. The information handling system of claim 17 , wherein the dual fan system further includes:
a first sloped section extending away from the exit of the first channel; and
a second sloped section extending away from the exit of the second channel, wherein the first and second sloped section direct the output airflow out of the dual fan system.

19. The information handling system of claim 18 , wherein the first sloped section includes a first opening at a neck of the second nozzle and the second sloped section includes a second opening at the neck of the second nozzle, wherein the first and second openings expose the first and second airflows to ambient air.

20. The information handling system of claim 19 , wherein a low-pressure region near the first opening pulls a third airflow into the air duct, and a second low pressure region near the second opening pulls a fourth airflow in the air duct.

Assignees

• Dell Products Lp

Inventors

• He Qinghong
• Mccartt Susan
• Miller Kelly
• North Travis

Classifications

• F04D19/002

  Axial flow fans · CPC title

• F04D29/522

  especially adapted for elastic fluid pumps · CPC title

• F04D25/166 Primary

  using fans · CPC title