Exhaust blending for piezoelectric cooling systems

Patent metadata

Field	Value
Publication number	US-12274020-B2
Application number	US-202318217481-A
Country	US
Kind code	B2
Filing date	Jun 30, 2023
Priority date	Mar 2, 2021
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

A system including a cooling element and an egress passageway is described. The cooling element is configured to provide a stream of hot air having been heated by a heat from a heat-generating structure. The hot air passes through the egress passageway toward an egress. The egress passageway includes at least one inlet through which cool air is drawn to be mixed with the hot air.

First claim

What is claimed is:

1. A system, comprising:
a cooling cell including a cooling element configured to undergo vibrational motion to draw air into an entrance of the cooling cell and provide a stream of hot air from the cooling cell, the stream of hot air being heated by a heat from a heat-generating structure, the stream of hot air having a first temperature after exiting the cooling cell; and
an egress passageway through which the stream of hot air passes toward an egress, the stream of hot air developing a first pressure in the egress passageway such that cool air is drawn into the egress passageway through at least one inlet, the cool air mixing with the hot air such that a mixture of the hot air and the cool air outside the egress has a second temperature less than the first temperature, wherein the cooling element and the at least one inlet of the egress passageway are configured such that the cooling element drives the hot air at a first flow rate and the cool air has a second flow rate greater than the first flow rate.

2. The system of claim 1 , wherein the second temperature is at least ten degrees Celsius less than the first temperature.

3. The system of claim 1 , wherein the first pressure is generated by a speed of the hot air passing through the egress passageway.

4. The system of claim 1 , wherein the cool air is entrained through the at least one inlet from an ambient environment external to a device including the cooling cell.

5. The system of claim 1 , wherein the cool air passes at least one additional component between the at least one inlet and the egress.

6. The system of claim 1 , wherein the second temperature does not exceed sixty degrees Celsius for the first temperature being at least seventy degrees Celsius.

7. The system of claim 1 , wherein the second temperature does not exceed fifty-five degrees Celsius.

8. The system of claim 1 , wherein the cooling element and the egress passageway are integrated into a computing device selected from a notebook computer, a laptop computer, and a smartphone.

9. The system of claim 1 , wherein the cooling cell has a height of not more than two millimeters.

10. A system, comprising:
an active cooling system including a plurality of active cooling cells and a heat spreader in thermal communication with a heat-generating structure, each of the plurality of active cooling cells including a cooling element, wherein the cooling element undergoes vibrational motion when actuated to draw air into the plurality of active cooling cells through at least one entrance for the plurality of active cooling cells, the air being heated by heat from the heat-generating structure, forming a stream of hot air exiting the active cooling system, the stream of hot air having a first temperature after exiting the active cooling system; and
an egress passageway through which the stream of hot air passes toward at least one egress, the stream of hot air developing a first pressure in the egress passageway such that cool air is drawn into the egress passageway through at least one inlet, the cool air mixing with the hot air such that a mixture of the hot air and the cool air outside the at least one egress has a second temperature less than the first temperature, wherein the cooling element and the at least one inlet of the egress passageway are configured such that the cooling element drives the hot air at a first flow rate and the cool air has a second flow rate greater than the first flow rate.

11. The system of claim 10 , wherein the second temperature is at least ten degrees Celsius less than the first temperature.

12. The system of claim 10 , wherein the first pressure is generated by a speed of the hot air passing through the egress passageway.

13. The system of claim 10 , wherein the cool air is entrained through the at least one inlet from an ambient environment external to a device including the active cooling cell.

14. The system of claim 10 , wherein the cool air passes at least one additional component between the at least one inlet and the egress.

15. The system of claim 10 , wherein the second temperature does not exceed sixty degrees Celsius for the first temperature being at least seventy degrees Celsius.

16. The system of claim 10 , wherein the second temperature does not exceed fifty-five degrees Celsius.

17. A method, comprising:
driving a cooling element of a cooling cell to induce a vibrational motion at a frequency, the vibrational motion drawing air into an entrance of the cooling cell and providing a stream of hot air from the cooling cell, the stream of hot air being heated by a heat from a heat-generating structure, the stream of hot air having a first temperature after exiting the cooling cell;
wherein the stream of hot air passes through an egress passageway toward an egress, the stream of hot air developing a first pressure in the egress passageway such that cool air is drawn into the egress passageway through at least one inlet, the cool air mixing with the hot air such that a mixture of the hot air and the cool air outside the egress has a second temperature less than the first temperature, wherein the cooling element and the at least one inlet of the egress passageway are configured such that the cooling element drives the hot air at a first flow rate and the cool air has a second flow rate greater than the first flow rate.

18. The method of claim 17 , wherein the second temperature is at least ten degrees Celsius less than the first temperature.

Assignees

• Frore Systems Inc

Inventors

• Sathyamurthy Prabhu
• Ganti Suryaprakash
• Madhavapeddy Seshagiri Rao
• Ahmed Lumaya
• Halakatti Shekhar

Classifications

• H10W40/43

  by flowing gases, e.g. forced air cooling · CPC title

• H05K7/20172 Primary

  Fan mounting or fan specifications · CPC title

• G06F1/203

  for portable computers, e.g. for laptops · CPC title

• H05K7/20145 Primary

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

• H01L23/467

  Electricity · mapped topic