Methods and apparatuses for drying electronic devices

• US 9,513,053 B2
• Filed: 03/14/2014
• Issued: 12/06/2016
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Revive Electronics, LLC
• Original Assignee: Revive Electronics, LLC
• Inventors: Zielinski, Reuben, Trusty, Joel, Trusty, Micah
• Primary Examiner(s): Gravini, Stephen M
• Application Number:
  US14/213,142
• Publication Number:
  US 20140259730A1
• Time in Patent Office: 998 Days
• Field of Search: 34/60, 34/92, 344/03, 344/12, 344/13, 219/242, 219/386, 219/392, 219/400
• US Class Current: 1/1
• CPC Class Codes: F26B 2200/00 Drying processes and machines for solid materials characterised by the specific requirements of the drying good
• CPC Class Codes: F26B 25/22 Controlling the drying process in dependence on liquid content of solid materials or objects
• CPC Class Codes: F26B 3/02 by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air F26B3/283 and F26B3/343 take precedence
• CPC Class Codes: F26B 5/04 by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum F26B11/049 and F26B17/128 take precedence
• CPC Class Codes: F26B 9/06 in stationary drums or chambers

Abstract

Methods and apparatuses for drying electronic devices are disclosed. Embodiments include methods and apparatuses that heat and decrease pressure within the electronic device. Some embodiments increase and decrease pressure while adding heat energy, such as by using a heated platen in contact with the electronic device or by supplying a gas (e.g., air), which may be heated, into the interior of the electronic device. Embodiments include heating the gas supplied into the interior of the electronic device with pump used to decrease pressure within the electronic device and/or a separate heater. Still other embodiments include controlling the temperature of the gas supplied into the electronic device. Still further embodiments automatically control, such as by using an electronic processor, some or all aspects of the drying of the electronic device.

Claims

1. A method, comprising:

placing a portable electronic device that has been rendered at least partially inoperable due to moisture intrusion into a low pressure chamber;

decreasing pressure within the low pressure chamber by removing first air from the low pressure chamber via an evacuation port located in an area enclosed by a sealing means for mating the low pressure chamber to a heater;

introducing, via an air injection nozzle connecting a pneumatic venting port, located in the area enclosed by the sealing means, to the portable electronic device, second air into an interior of the portable electronic device, the second air being at a pressure above a pressure within the low pressure chamber;

removing moist air from the interior of the portable electronic device;

equalizing the pressure within the low pressure chamber with a pressure outside the low pressure chamber; and

removing the portable electronic device from the low pressure chamber.

2. The method of claim 1, wherein the second air is introduced while the pressure in the low pressure chamber is below the pressure outside the low pressure chamber.

3. The method of claim 1, wherein the second air is introduced during said decreasing pressure.

4. The method of claim 1, wherein the second air is introduced before said equalizing the pressure.

5. The method of claim 1, wherein the second air being introduced into the interior of the portable electronic device is at a pressure above the pressure outside the low pressure chamber.

6. The method of claim 1, comprising:

heating the portable electronic device using the heater.

7. The method of claim 6, wherein heating the portable electronic device includes heating the second air being introduced into the interior of the portable electronic device.

8. The method of claim 7, comprising:

measuring a temperature of the second air being introduced into the interior of the portable electronic device.

9. The method of claim 7, comprising:

controlling a temperature of the second air being introduced into the portable electronic device to be at least 90 degrees F. and at most 140 degrees F.

10. The method of claim 7, wherein said decreasing pressure and said heating are performed by a vacuum pump.

11. The method of claim 7, wherein said decreasing pressure is performed by a vacuum pump, and wherein said heating is performed by an object other than the vacuum pump.

12. The method of claim 6, wherein heating the portable electronic device includes heating the second air being introduced into the interior of the portable electronic device and heating an exterior surface of the portable electronic device through direct contact with the exterior surface of the portable electronic device.

13. The method of claim 1, wherein decreasing pressure includes decreasing the pressure within the low pressure chamber to at least approximately 28 inches of Hg below the pressure outside the chamber.

14. The method of claim 1, wherein introducing the second air into the interior of the portable electronic device includes introducing the second air into the interior of the portable electronic device at a rate of at least approximately 0.5 cubic feet per minute and at most approximately 2.5 cubic feet per minute.

30. The method of claim 1, further comprising flushing, using a purging means and through a desiccator, the moist air out of the low pressure chamber.

31. The method of claim 30, further comprising a 3-way control valve for switching airflow from introducing the moist air into the desiccator from the low pressure chamber to removing the moist air from the desiccator and introducing the moist air to the atmosphere.

32. The method of claim 1, wherein the sealing means comprises a sealing ring.

33. The method of claim 1, wherein the low pressure chamber couples to the heater using the sealing means along a surface of the heater where the electronic device is in contact with the heater.

34. The method of claim 1, wherein the evacuation port or the pneumatic venting port is comprised in the heater.

35. The method of claim 1, wherein the pneumatic venting port removes air from a convection chamber that comprises the low pressure chamber.

15. An apparatus, comprising:

a low pressure chamber defining an interior, the low pressure chamber sized and configured for placement of an electronic device in the interior of the low pressure chamber and removal of the electronic device from the interior of the low pressure chamber;

an evacuation pump connected to the low pressure chamber and configured to decrease pressure within the low pressure chamber by removing first air from the low pressure chamber via an evacuation port located in an area enclosed by a sealing means for sealing the low pressure chamber to a heater; and

a gas nozzle injector configured for pneumatic connection from a pneumatic venting port located in the area enclosed by the sealing means to the electronic device while the evacuation pump removes the first air from the low pressure chamber, the gas nozzle injector being configured for introducing second air into an interior of the electronic device, the second air being at a pressure above a pressure within the interior of the low pressure chamber.

16. The apparatus of claim 15, wherein the gas nozzle injector is configured to inject the second air into the interior of the electronic device.

17. The apparatus of claim 15, wherein the gas nozzle injector is configured to connect to and inject the second air through an electronic connection port of the electronic device.

18. The apparatus of claim 15, comprising:

the heater connected to the gas nozzle injector, wherein the heater heats the second air before it is introduced into the interior of the electronic device.

19. The apparatus of claim 18, wherein the heater is the evacuation pump.

20. The apparatus of claim 18, wherein the heater is not the evacuation pump.

21. The apparatus of claim 18, comprising:

the heater adapted to heat an exterior surface of the electronic device placed in the low pressure chamber through direct contact with the exterior surface of the electronic device.

22. The apparatus of claim 18, comprising:

a controller to control a temperature of the second air being introduced into the interior of the electronic device.

23. The apparatus of claim 18, wherein the heater heats the second air to at least approximately 90 degrees F. and at most approximately 140 degrees F.

24. The apparatus of claim 15, comprising:

a controller connected to the evacuation pump and to the heater, the controller controlling removal of moisture from the electronic device by controlling the evacuation pump to decrease pressure within the low pressure chamber and controlling operation of the heater to add heat to the electronic device.

25. The apparatus of claim 15, wherein the controller controls the evacuation pump to decrease the pressure within the low pressure chamber to at least approximately 28 inches of Hg below the pressure outside the chamber.

26. The apparatus of claim 15, wherein the gas nozzle injector introduces the second air into the interior of the electronic device when the evacuation pump has decreased the pressure within the low pressure chamber below ambient conditions.

27. The apparatus of claim 15, wherein the gas nozzle injector introduces the second air into the interior of the electronic device while the evacuation pump is decreasing pressure within the low pressure chamber.

28. The apparatus of claim 15, wherein the gas nozzle injector introduces the second air at a pressure above the pressure outside the low pressure chamber.

29. The apparatus of claim 15, wherein the gas nozzle injector is configured to introduce the second air into the electronic device at a rate of at least approximately 0.5 cubic feet per minute and at most approximately 2.5 cubic feet per minute.