Modular water purification device

1. A water purification device, comprising:

a feed water reservoir configured to store feed water;

a water vapor chamber configured to receive water vapor generated from heating the feed water in the feed water reservoir;

a condensation chamber configured to receive the water vapor and condense the water vapor into purified water;

a Peltier device comprising a hot side and a cold side, wherein the Peltier device is configured to receive a voltage from a power source and create a temperature difference between the hot side and the cold side, wherein the hot side is configured to heat the feed water into water vapor and the cold side is configured to condense the water vapor into purified water;

a set of one or more temperature sensors configured to measure a temperature of the feed water inside the feed water reservoir;

a set of one or more electrically heated auxiliary heating elements made of metal, the electrically heated auxiliary heating elements configured to heat the feed water into water vapor; and

a controller configured to:

receive temperature measurements from the set of one or more temperature sensors;

determine, based on the temperature measurements, a rate of change of temperature of the feed water inside the feed water reservoir caused by the hot side of the Peltier device heating the feed water into water vapor;

determine, based on at least the rate of change of temperature, an amount of water that will be purified in a predetermined amount of time; and

turn on power to the set of one or more electrically heated auxiliary heating elements when the amount of water that will be purified is determined to be below a threshold.

2. The water purification device of claim 1 , wherein the controller is further configured to turn off the power to the set of one or more electrically heated auxiliary heating elements after the temperature of the feed water inside the feed water reservoir reaches a boiling point.

3. The water purification device of claim 1 further comprising:

a set of one or more water level sensors configured to measure a level of feed water in the feed water reservoir;

wherein the controller is further configured to:

receive the measurements of the level of feed water in the feed water reservoir from the set of one or more water level sensors;

determine an amount of feed water in the feed water reservoir from the measurements of the level of feed water in the feed water reservoir; and

determine the amount of water that will be purified in the predetermined amount of time further based on the amount of the feed water in the feed water reservoir.

4. The water purification device of claim 1 further comprising:

a first valve configured to bring feed water into the feed water reservoir; and

a second valve configured to transfer at least a portion of the feed water out of the feed water reservoir;

wherein the controller is further configured to close the first and second valves and provide electricity to the Peltier device in a purification cycle of the water purification device; and

wherein the controller is further configured to determine the amount of water that will be purified in the predetermined amount of time further based on a time elapsed since a beginning of the water purification cycle.

5. The water purification device of claim 1 , wherein determining that the amount of water that will be purified is below the threshold comprises determining that the temperature of the feed water in the feed water reservoir will not reach a boiling point in the predetermined amount of time.

6. The water purification device of claim 1 , wherein determining that the amount of water that will be purified is below the threshold comprises determining that the temperature of the feed water in the feed water reservoir will reach a boiling point in the predetermined amount of time but the boiling point will be reached when there is not enough time remaining to purify the threshold amount of water within said predetermined amount of time.

7. The water purification device of claim 1 further comprising:

a frame encompassing the feed water reservoir, the water vapor chamber, the condensation chamber, and the Peltier device;

wherein the controller is further configured to determine the amount of water that will be purified in the predetermined amount of time further based on a temperature outside the frame of the water purification device.

8. The water purification device of claim 1 further comprising one or more solar panels configured to provide electricity to the Peltier device.

9. The water purification device of claim 1 further comprising:

a feed water input channel configured to receive the feed water into the feed water reservoir;

a feed water output channel configured to transfer at least a portion of the feed water out of the water purification device; and

a purified water output channel configured to transfer the purified water out of the water purification device.

10. The water purification device of claim 9 ,

wherein the water purification device is a modular water purification device configured to connect to one or more other water purification devices in a cascade,

wherein when the water purification device is configured as a first water purification device in the cascade, the feed water input channel of the water purification device is configured to receive the feed water from a source outside of the cascade,

wherein when the water purification device is configured as a last water purification device in the cascade, the feed water output channel of the water purification device is configured to transfer at least a portion of the feed water to a reservoir outside of the cascade, and

wherein when the water purification device is configured as a water purification device other than the first water purification device in the cascade, the feed water input channel of the water purification device is configured to connect to the feed water output channel of a previous water purification device in the cascade.

11. A water purification device, comprising:

a feed water reservoir configured to store feed water;

a water vapor chamber configured to receive water vapor generated from heating the feed water in the feed water reservoir;

a condensation chamber configured to receive the water vapor and condense the water vapor into purified water;

a Peltier device comprising a hot side and a cold side, wherein the hot side is configured to heat the feed water into water vapor and the cold side is configured to condense the water vapor into purified water;

a set of one or more temperature sensors configured to measure a temperature of the feed water inside the feed water reservoir;

a set of one or more electrically heated heating elements configured to heat the feed water into water vapor;

a frame encompassing the feed water reservoir, the water vapor chamber, the condensation chamber, and the Peltier device; and

a controller configured to:

receive temperature measurements from the set of one or more temperature sensors;

determine, based on the temperature measurements, a rate of change of temperature of the feed water inside the feed water reservoir;

determine, based on at least the rate of change of temperature, an amount of water that will be purified in a predetermined amount of time; and

turn on power to the set of one or more electrically heated auxiliary heating elements when the amount of water that will be purified is determined to be below a threshold;

wherein the feed water reservoir is configured as an open bowl encompassed by an upper portion of the frame, and

wherein the upper portion of the frame is made of a material that is transparent to sunlight to allow sunlight to reach the feed water reservoir to heat the feed water.

12. The water purification device of claim 11 , wherein the material that is transparent to sunlight creates a lens effect to focus sunlight passing through the upper portion of the frame to heat the feed water in the feed water reservoir.

13. The water purification device of claim 11 ,

wherein the condensation chamber is encompassed by a lower portion of the frame, and

wherein the lower portion is made of a material that that is opaque to sunlight to prevent sunlight from reaching the condensation chamber.

14. The water purification device of claim 13 , wherein the lower portion comprises two layers substantially separated by vacuum.