Low power water filter monitoring system

1. A water filter comprising:

a power supply;

a controller;

a water flow signal receiver configured to receive a water flow signal from an appliance;

wherein the appliance provides the water flow signal whenever water is flowing through the water filter; and

wherein the controller is configured to operate a counter to monitor a total time for which the water flow signal receiver has received the water flow signal from the appliance.

2. The water filter of claim 1 , wherein the water flow signal receiver comprises a light sensor, and wherein the appliance provides the water flow signal to the water filter by illuminating a lighting device such that light from the lighting device is received by the light sensor.

3. The water filter of claim 1 , wherein the water flow signal receiver comprises an infrared receiver, and wherein the appliance provides the water flow signal to the water filter by transmitting an infrared signal to the infrared receiver.

4. The water filter of claim 1 , further comprising:

an ambient light sensor; and

one or more water filter status indicators;

wherein the controller is configured to operate the one or more water filter status indicators when ambient light is received by the ambient light sensor; and

wherein the controller is configured operate the one or more water filter status indicators by performing operations, the operations comprising:

determining a status of the water filter; and

operating the one or more water filter status indicators to indicate the water filter status.

5. The water filter of claim 4 , wherein the controller determines the status of the water filter based at least in part on the total time for which the water flow signal receiver has received the water flow signal from the appliance.

6. The water filter of claim 4 , wherein the controller does not operate the one or more water filter status indicators unless ambient light is received by the ambient light sensor.

7. The water filter of claim 1 , further comprising a data transmitter configured to transmit water filter usage data to the appliance, wherein the water filter usage data comprises the total time for which the water flow signal receiver has received the water flow signal from the appliance.

8. The water filter of claim 7 , further comprising a second controller configured to operate the data transmitter, wherein the water flow signal receiver is configured to cause power to be supplied to the second controller when the water flow signal is received from the appliance, and wherein the second controller does not receive power when the water flow signal is not received from the appliance.

9. A water filter comprising:

a power supply;

a controller;

an ambient light sensor; and

one or more water filter status indicators;

wherein the controller is configured to perform operations when ambient light is received by the ambient light sensor, the operations comprising:

determining a status of the water filter; and

operating the one or more water filter status indicators to indicate the water filter status.

10. The water filter of claim 9 , wherein the one or more water filter status indicators are not operated unless the ambient light sensor is receiving ambient light.

11. The water filter of claim 9 , wherein the one or more water filter status indicators comprise a first light emitting diode that emits a first color when illuminated, a second light emitting diode that emits a second color when illuminated, and a third light emitting diode that emits a third color when illuminated.

12. The water filter of claim 9 , wherein:

determining the status of the water filter comprises determining a usage amount, wherein the usage amount is based at least in part on an expected remaining lifespan of the power supply; and

operating the one or more water filter status indicators to indicate the water filter status comprises operating the one or more water filter status indicators based at least in part of the usage amount.

13. The water filter of claim 9 , further comprising:

a water flow signal receiver configured to receive a water flow signal from an appliance;

wherein the appliance provides the water flow signal whenever water is flowing through the water filter; and

wherein the controller is configured to operate a counter to monitor a total time for which the water flow signal receiver has received the water flow signal from the appliance.

14. The water filter of claim 13 , wherein:

determining the status of the water filter comprises calculating a usage amount, wherein the usage amount is calculated based at least in part on the total time for which the water flow signal receiver has received the water flow signal from the appliance and a current consumption amount associated with the one or more water filter status indicators; and

operating the one or more water filter status indicators to indicate the water filter status comprises operating the one or more water filter status indicators based at least in part of the usage amount.

15. The water filter of claim 13 , further comprising:

a data transmitter; and

a second controller;

wherein the water flow signal receiver is configured to cause power to be supplied to the second controller when the water flow signal receiver receives the water flow signal from the appliance; and

wherein the second controller is configured to operate the data transmitter to transmit usage data to the appliance when it receives power.

16. A method for operating a water filter included in a refrigeration appliance, the water filter having a power supply that is independent from the refrigeration appliance, the method comprising:

receiving ambient light at a light sensor of the water filter;

when the ambient light is received at the light sensor, determining a usage amount associated with the water filter, wherein the usage amount is indicative of an expected remaining lifespan associated with the water filter;

when the ambient light is received at the light sensor, operating one or more water filter status indicators based at least in part on the determined usage amount; and

when the ambient light is no longer received at the light sensor, ceasing to operate the one or more water filter status indicators.

17. The method of claim 16 , further comprising:

receiving a water flow signal at a water flow signal receiver of the water filter, wherein the refrigeration appliance provides the water flow signal to the water filter when water is flowing through the water filter; and

when the water flow signal is received at the water flow signal receiver, initializing a counter;

wherein the counter counts a total time for which the water flow signal has been received at the water flow signal receiver; and

wherein determining the usage amount associated with the water filter comprises determining the usage amount associated with the water filter based at least in part on the total time for which the water flow signal has been received at the water flow signal receiver.

18. The method of claim 17 , further comprising, when the water flow signal is received at the water flow signal receiver, transmitting the usage amount to the refrigeration appliance using a data transmitter of the water filter.

19. The method of claim 16 , wherein operating one or more water filter status indicators based at least in part on the determined usage amount comprises:

determining whether the water filter has exceeded a first usage milestone based at least in part on the usage amount;

illuminating a first light emitting diode when it is determined that the water filter has not exceeded the first usage milestone;

when it is determined that the water filter has exceeded the first usage milestone, determining whether the water filter has exceeded a second usage milestone based at least in part on the usage amount;

illuminating a second light emitting diode when it is determined that the water filter has exceed the first usage milestone but has not exceeded the second usage milestone;

when it is determined that the water filter has exceeded the second usage milestone, determining whether the water filter has exceed a third usage milestone based at least in part on the usage amount; and

illuminating a third light emitting diode when it is determined that the water filter has exceed the second usage milestone but has not exceeded the third usage milestone.

20. The method of claim 16 , further comprising:

receiving a water flow signal at a water flow signal receiver of the water filter, wherein the refrigeration appliance provides the water flow signal to the water filter when water is flowing through the water filter; and

in response to receiving the water flow signal at the water flow signal receiver, causing power to be provided to a second controller;

wherein the second controller operates a data transmitter to transmit data to the refrigeration appliance.