Mobile phone and other compute device cooling architecture

Patent metadata

Field	Value
Publication number	US-10788034-B2
Application number	US-201916369835-A
Country	US
Kind code	B2
Filing date	Mar 29, 2019
Priority date	Aug 10, 2018
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A system for cooling a mobile phone and method for using the system are described. The system includes an active piezoelectric cooling system, a controller and an interface. The active piezoelectric cooling system is configured to be disposed in a rear portion of the mobile phone distal from a front screen of the mobile phone. The controller is configured to activate the active piezoelectric cooling system in response to heat generated by heat-generating structures of the mobile phone. The interface is configured to receive power from a mobile phone power source when the active piezoelectric cooling system is activated.

First claim

What is claimed is:

1. A system for cooling a mobile phone comprising:
an active piezoelectric cooling system configured to be disposed in a rear portion of a mobile phone distal from a front screen of the mobile phone;
a controller configured to activate the active piezoelectric cooling system in response to heat generated by heat-generating structures of the mobile phone; and
an interface configured to receive power from a mobile phone power source when the active piezoelectric cooling system is activated;
wherein the active piezoelectric cooling system includes a plurality of cooling cells, the plurality of cooling cells including a plurality of piezoelectric cooling elements, each of the plurality of piezoelectric cooling elements having a first side distal from the heat-generating structures and a second side proximal to the heat-generating structures, each of the plurality of piezoelectric cooling elements being configured to direct a fluid using a vibrational motion from the first side of the cooling element to the second side such that the fluid moves in a direction that is incident on a surface for the heat-generating structure at a substantially perpendicular angle and then is deflected to move along the surface of the heat-generating structure to extract heat from the heat-generating structure.

2. The system of claim 1 , wherein the active piezoelectric cooling system is not more than five hundred microns thick.

3. The system of claim 1 , wherein the active piezoelectric cooling system cools the heat-generating structures, the heat-generating structures including at least one of a semiconductor component, a sensor, an antenna and a battery.

4. The system of claim 1 , wherein the active piezoelectric cooling system includes the plurality of cooling cells having the plurality of piezoelectric cooling elements.

5. The system of claim 4 , wherein the fluid is a liquid and wherein the plurality of piezoelectric cooling elements of the plurality of cooling cells are configured to use vibrational motion to direct the liquid toward the heat-generating structures in the mobile phone.

6. The system of claim 4 , wherein the fluid is a gas and the plurality of piezoelectric cooling elements of the plurality of cooling cells is configured to use vibrational motion to direct the gas toward the heat-generating structures in the mobile phone.

7. The system of claim 1 wherein each of the plurality of cooling cells further includes:
an orifice plate having at least one orifice therein, the orifice plate being disposed between the plurality of piezoelectric cooling element and the heat-generating structures, wherein the plurality of piezoelectric cooling element is at least fifty microns and not more than five hundred microns from the orifice plate and has a length of at least three millimeters and not more than seven millimeters and wherein the orifice plate is at least fifty microns and not more than five hundred microns from the heat generating structures.

8. A system for cooling a compute device comprising:
an active cooling system including a plurality of active cooling elements, the active cooling system being not more than five hundred microns thick;
a controller configured to selectively activate at least a portion of the active cooling elements of the active cooling system in response to heat generated by heat-generating structures of the compute device, the at least a portion of the plurality of active cooling elements directing a fluid toward the heat-generating structures; and
an interface configured to receive power from a compute device power source when the active cooling system is activated;
wherein the plurality of active cooling elements includes a plurality of piezoelectric cooling elements, each of the plurality of piezoelectric cooling elements having a first side distal from the heat generating structures and a second side proximal to the heat-generating structures, each of the plurality of piezoelectric cooling elements being configured to direct the fluid using a vibrational motion from the first side of the cooling element to the second side such that the fluid moves in a direction that is incident on a surface for the heat-generating structure at a substantially perpendicular angle and then is deflected to move along the surface of the heat-generating structure to extract heat from the heat-generating structure.

9. The system of claim 8 wherein the active cooling system further includes:
at least one orifice plate having at least one orifice therein, the at least one orifice plate being disposed between the plurality of piezoelectric cooling elements and the heat-generating structures, wherein the plurality of piezoelectric cooling elements is at least fifty microns and not more than five hundred microns from the orifice plate and has a length of at least three millimeters and not more than seven millimeters and wherein the orifice plate is at least fifty microns and not more than five hundred microns from the heat generating structures.

10. The system of claim 8 , wherein the compute device is a mobile device.

11. A method of cooling a mobile phone, comprising:
determining that heat-generating structures of the mobile phone generate heat during operation of the mobile phone; and
driving an active piezoelectric cooling system configured to be disposed in a rear portion of the mobile phone distal from a front screen of the mobile phone in response to a determination that the heat generating structures generate heat;
wherein the active piezoelectric cooling system includes a plurality of piezoelectric cooling elements, each of the plurality of piezoelectric cooling elements having a first side distal from the heat-generating structures and a second side proximal to the heat-generating structures, each of the plurality of piezoelectric cooling elements being configured to direct the fluid using a vibrational motion from the first side of the cooling element to the second side such that the fluid moves in a direction that is incident on a surface for the heat-generating structure at a substantially perpendicular angle and then is deflected to move along the surface of the heat-generating structure to extract heat from the heat-generating structure.

12. The method of claim 11 , wherein the active piezoelectric cooling system is not more than five hundred microns thick.

13. The method of claim 11 , wherein the driving further includes:
using vibrational motion of the at least one of the plurality of piezoelectric cooling elements to drive the fluid toward the heat generating structures, the heat-generating structures including at least one of a semiconductor component, a sensor, an antenna and a battery.

14. The method of claim 11 , wherein the determining further includes:
predicting that the heat-generating structures will generate heat based upon at least one of a temperature measurement, a clock speed, a usage pattern, and an interface use.

15. The method of claim 11 , wherein the determining further includes:
measuring a temperature of at least one of the heat-generating structures.

16. The method of claim 11 wherein the cooling further includes:
directing a fluid toward the plurality of heat-generating structures in the mobile phone by the plurality of piezoelectric cooling elements.

17. The method of claim 11 wherein the active piezoelectric cooling system further includes:
at least one orifice plate having at least one orifice therein, the orifice plate being disposed between the plurality of piezoelectric cooling elements and the heat-gene

Assignees

• Frore Systems Inc

Inventors

• Ganti Suryaprakash
• Madhavapeddy Seshagiri Rao

Classifications

• H10W40/776

  Arrangements for jet impingement, e.g. for spraying · CPC title

• H10W40/70

  Fillings or auxiliary members in containers or in encapsulations for thermal protection or control · CPC title

• H10W40/47

  by flowing liquids, e.g. forced water cooling · CPC title

• H10W40/40

  involving heat exchange by flowing fluids · CPC title

• H10W40/475 Primary

  using jet impingement (H10W40/776 takes precedence) · CPC title