Methods and apparatuses for drying electronic devices
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.
1. A method, comprising:
placing a portable electronic device that has been rendered at least partially inoperable due to moisture intrusion into a drying chamber;
providing a first air channel, wherein the first air channel connects the drying chamber, a pressure-generating device, and a moisture-reducing device;
generating a first air flow through the first air channel using the pressure-generating device;
removing a first moisture from an interior of the portable electronic device to an exterior of the portable electronic device;
detecting an amount of moisture removed from the portable electronic device;
pausing the generating the first air flow through the first air channel based on the amount of moisture;
providing a second air channel, wherein the second air channel connects the moisture-reducing device, the pressure-generating device, a valve, and an evacuation channel;
generating a second air flow through the second air channel using the pressure-generating device; and
removing a second moisture from the moisture-reducing device.
2. The method of claim 1 , further comprising:
measuring a relative humidity within the drying chamber; and pausing the generating the first air flow through the first air channel after the relative humidity has decreased and a rate of decrease of the relative humidity has slowed; or
measuring the relative humidity within the drying chamber, wherein generating the first air flow through the first air channel begins when the relative humidity has increased and the rate of increase of the relative humidity has slowed; or
measuring the relative humidity within the drying chamber, wherein the generating the first air flow through the first air channel is paused once a difference between a sequential relative humidity maximum and humidity minimum are within a predetermined tolerance; or
measuring the relative humidity within the drying chamber, wherein the generating the first air flow through the first air channel is stopped once the humidity within the drying chamber reaches a predetermined value.
3. The method of claim 1 , further comprising regenerating the moisture-reducing device, optionally, wherein the regenerating includes heating the moisture-reducing device.
4. The method of claim 1 , further comprising:
generating the first air flow through the first air channel using a fan; and
removing the first moisture from the drying chamber with the moisture-reducing device prior to the air reaching back to the drying chamber.
5. The method of claim 4 , wherein the removing the first moisture includes removing the first moisture using a desiccator comprising a desiccant, and wherein the moisture-reducing device comprises the desiccator.
6. The method of claim 5 , further comprising removing the second moisture from the desiccant.
7. The method of claim 6 , comprising:
isolating the desiccator from the drying chamber prior to removing the second moisture from the desiccant; or
generating the second air flow through the desiccator while removing the second moisture from the desiccant; or
heating the desiccant during the removing the second moisture from the desiccant; or
the heating includes heating the desiccant to at least 200 deg. F. (93.3° C.) and at most 300 deg. F. (148.9° C.); or
the heating includes heating the desiccant to 250 deg. F. (121.1° C.).
8. The method of claim 2 , wherein the portable electronic device is at least one of:
a hearing aid or a hearable.
9. An apparatus, comprising:
a drying chamber defining an interior, and having the interior sized and configured for placement of an electronic device in the interior and removal of the electronic device from the interior;
a first air channel, wherein the first air channel connects the drying chamber, a pressure-generating device, and a moisture-reducing device;
a second air channel, wherein the second air channel connects the moisture-reducing device, the pressure-generating device, a valve, and an evacuation channel;
a controller connected to the pressure-generating device and to the moisture-reducing device, the controller being configured to control the pressure-generating device to generate a first air flow through the first air channel and operate the moisture-reducing device to remove moisture from the drying chamber,
wherein the controller is configured to control the pressure-generating device to generate the first air flow through the first air channel multiple times, and
wherein the controller is further configured to control the pressure-generating device to generate a second air flow through the second air channel; and
a computing device connected to a moisture-based sensor, wherein the computing device is configured to determine a first moisture removed from the interior of the electronic device or a second moisture remaining in the drying chamber and provide instructions to the controller to continue or pause the generating of the first air flow through the first air channel based on the first moisture or the second moisture.
10. The apparatus of claim 9 , wherein:
the controller is configured to control the pressure-generating device to at least temporarily stop generating the first air flow through the first air channel when a rate at which humidity within the drying chamber changes decreases or is zero; or
a humidity sensor detects maximum and minimum values of relative humidity within the drying chamber as the pressure-generating device generates the first air flow through the first air channel multiple times, and wherein the controller is configured to determine that the electronic device is dry when a difference between successive maximum and minimum relative humidity values is equal to or less than a predetermined value; or
the controller is configured to control the pressure-generating device to begin generating the first air flow through the first air channel when the rate at which the relative humidity within the drying chamber changes either decreases or is zero.
11. The apparatus of claim 9 , comprising a humidity sensor connected to the drying chamber and the controller, wherein the controller is configured to control the pressure-generating device to at least temporarily stop generating the first air flow through the first air channel based at least in part on signals received from the moisture-based sensor.
12. The apparatus of claim 9 , comprising:
a humidity sensor connected to the moisture-reducing device and the controller, wherein the controller is configured to control the moisture-reducing device to maintain a predetermined relative humidity in the first air flow based at least in part on signals received from the humidity sensor.
13. The apparatus of claim 9 , wherein the moisture-reducing device includes a heater with which the moisture-reducing device is connected to during removal of moisture from the moisture-reducing device.
14. The apparatus of claim 9 , wherein a portable electronic device is at least one of:
a hearing aid or a hearable.
15. An apparatus, comprising:
a drying chamber defining an interior, and having the interior configured for placement of an electronic device in the interior and removal of the electronic device from the interior;
a first air channel, wherein the first air channel connects the drying chamber, a pressure-generating device, and a moisture-reducing device;
a second air channel, wherein the second air channel connects the moisture-reducing device, the pressure-generating device, a valve, and an evacuation channel;
a controller connected to the pressure-generating device and to the moisture-reducing device, the controller being configured to control the pressure-generating device to generate a first air flow through the first air channel and operate the moisture-reducing device to remove moisture from the drying chamber, wherein the controller is configured to control the pressure-generating device to generate the first air flow through the first air channel multiple times; and
a computing device connected to the controller, wherein the computing device determines a first moisture removed from the interior of the electronic device or a second moisture remaining in the drying chamber and provides instructions to the controller to continue or pause the generating of the first air flow through the first air channel based on the first moisture or the second moisture.
16. The apparatus of claim 15 , wherein the pressure-generating device is a fan and the moisture-reducing device is a desiccant.
17. The apparatus of claim 16 , wherein the electronic device is at least one of:
a hearing aid or a hearable.