Multi-phase heat dissipating device comprising piezo structures

Patent metadata

Field	Value
Publication number	US-2019257589-A1
Application number	US-201916398001-A
Country	US
Kind code	A1
Filing date	Apr 29, 2019
Priority date	Apr 11, 2016
Publication date	Aug 22, 2019
Grant date	—

Abstract

A device that includes a region comprising an integrated device, and a heat dissipating device coupled to the region comprising the integrated device. The heat dissipating device is configured to dissipate heat away from the region. The heat dissipating device includes a fluid, an evaporator configured to evaporate the fluid, a condenser configured to condense the fluid, an inner wall coupled to the evaporator and the condenser, an outer shell encapsulating the fluid, the evaporator, the condenser and the inner wall, an evaporation portion configured to channel an evaporated fluid from the evaporator to the condenser, and a collection portion configured to channel a condensed fluid from the condenser to the evaporator. The heat dissipating device includes one or more piezo structures configured to move fluid inside the heat dissipating device.

First claim

What is claimed is:

1 . A device comprising:
a region comprising an integrated device; and a heat dissipating device coupled to the region comprising the integrated device, the heat dissipating device configured to dissipate heat away from the region, wherein the heat dissipating device comprises:
a fluid;
an evaporator configured to evaporate the fluid;
a condenser configured to condense the fluid;
an inner wall coupled to the evaporator and the condenser, wherein the inner wall is a separation wall that prevents fluid leaving from the evaporator from mixing with fluid leaving from the condenser;
an outer shell encapsulating the fluid, the evaporator, the condenser and the inner wall;
an evaporation portion configured to channel the fluid from the evaporator to the condenser;
a plurality of evaporation portion walls in the evaporation portion;
a collection portion configured to channel the fluid from the condenser to the evaporator; and
at least one piezo structure configured to move fluid inside the heat dissipating device.

2 . The device of claim 1 , wherein the piezo structure is configured to move fluid by oscillating relative to a point.

3 . The device of claim 1 , wherein the piezo structure is configured to move fluid by vibrating relative to a point.

4 . The device of claim 1 , wherein the piezo structure is configured to move fluid by rotating relative to a point.

5 . The device of claim 1 , wherein the piezo structure includes a piezoelectric element with a fixed first end and a moveable second end.

6 . The device of claim 1 , wherein the piezo structure includes a piezoelectric pump.

7 . The device of claim 6 , wherein the piezoelectric pump comprises:
an inlet configured for fluid to enter into the piezoelectric pump; a first valve coupled to the inlet, wherein the first valve is configured to allow fluid to flow in one particular direction; a compartment coupled to the inlet; an outlet coupled to the compartment, the outlet configured for fluid to exit the piezoelectric pump; a second valve coupled to the outlet, wherein the second valve is configured to allow fluid to flow in one particular direction; a piezoelectric element configured to move fluid from the inlet, through the compartment and to the outlet, by bending back and forth.

8 . The device of claim 1 , wherein the at least one piezo structure includes a plurality of piezo structures that are arranged in series.

9 . The device of claim 1 , wherein the piezo structure includes a piezoelectric membrane.

10 . The device of claim 1 , wherein the piezo structure is located in the evaporation portion.

11 . The device of claim 1 , wherein the piezo structure is located in the collection portion.

12 . The device of claim 1 , wherein the heat dissipating device is incorporated into a device selected from the group consisting of a music player, a video player, an entertainment unit, a navigation device, a communications device, a mobile device, a mobile phone, a smartphone, a personal digital assistant, a fixed location terminal, a tablet computer, a computer, a wearable device, an Internet of things (IoT) device, a laptop computer, a server, and a device in an automotive vehicle.

13 . An apparatus comprising:
a region comprising an integrated device; and a heat dissipating means coupled to the region comprising the integrated device, the heat dissipating means is configured to dissipate heat away from the region, wherein the heat dissipating means comprises:
a fluid;
a means for evaporating configured to evaporate the fluid;
a means for condensing configured to condense the fluid;
an inner wall coupled to the means for evaporating and the means for condensing, wherein the inner wall is a separation wall that prevents fluid leaving from the means for evaporating from mixing with fluid leaving from the means for condensing;
an outer shell encapsulating the fluid, the means for evaporating, the means for condensing and the inner wall;
an evaporation portion configured to channel the fluid from the means for evaporating to the means for condensing;
a plurality of evaporation portion walls in the evaporation portion;
a collection portion configured to channel the fluid from the means for condensing to the means for evaporating; and
piezoelectric means for moving fluid inside the heat dissipating means.

14 . The apparatus of claim 13 , wherein the piezoelectric means for moving fluid is configured to oscillate relative to a point to move the fluid.

15 . The apparatus of claim 13 , wherein the piezoelectric means for moving fluid is configured to flap relative to a point to move the fluid.

16 . The apparatus of claim 13 , wherein the piezoelectric means for moving fluid includes a piezoelectric pump.

17 . A method for heat dissipation of a device, comprising:
providing a region comprising an integrated device; and coupling a heat dissipating device to the region comprising the integrated device, the heat dissipating device configured to dissipate heat away from the region, wherein the heat dissipating device comprises:
a fluid;
an evaporator configured to evaporate the fluid;
a condenser configured to condense the fluid;
an inner wall coupled to the evaporator and the condenser, wherein the inner wall is a separation wall that prevents fluid leaving from the evaporator from mixing with fluid leaving from the condenser;
an outer shell encapsulating the fluid, the evaporator, the condenser and the inner wall;
an evaporation portion configured to channel the fluid from the evaporator to the condenser;
a plurality of evaporation portion walls in the evaporation portion;
a collection portion configured to channel the fluid from the condenser to the evaporator; and
a piezo structure configured to move the fluid inside the heat dissipating device.

18 . The method of claim 17 , further providing a current to the piezo structure to activate the piezo structure.

19 . The method of claim 18 , wherein the current to the piezo structure is provided when a temperature of the device reaches a threshold temperature.

20 . The method of claim 18 , further stopping providing the current when the temperature of the device is below a threshold temperature.

Assignees

• Qualcomm Inc

Inventors

• Rosales Jorge Luis
• Gao Le
• Le Don
• Anderson Jon James

Classifications

• H10W40/73 Primary

  for cooling by change of state · CPC title

• F28D15/0266

  with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers (F28D15/043 takes precedence) · CPC title

• F04B17/003

  driven by piezoelectric means (F04B43/046 and F04B43/095 take precedence) · CPC title

• H05K7/20309

  Evaporators · CPC title

• H05K7/20327

  Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds · CPC title