As long as it's plugged in, even in the desert, this device can extract water from the air. Recently, Jin Guoyong, a junior student at Chongqing University of Technology and Business, developed an "air-to-water machine" capable of producing 20 kilograms of water per day. According to a report by the Chongqing Business Daily, the invention was inspired by last year's severe drought in Chongqing, which sparked Jin's idea to create a sustainable solution for water scarcity.
On September 25, a reporter visited Jin’s home and saw the “multi-functional refrigeration water storage and preservation device.†The machine, built from recycled cardboard boxes, stands less than half a meter tall. A plastic tube about one meter long extends from its base, and within just 30 minutes, the tube produced enough water to fill a small basin. “After purification, the water is safe to drink,†Jin explained.
Inside the machine, a refrigeration compressor is housed, with a thin copper tube that draws in air and cools it. When the cold air inside the tube meets the warmer air outside, condensation occurs, forming water droplets on the outer surface. These droplets are then collected and directed through a water guide system. Additionally, the cold air from the system can be used to cool a specially designed storage compartment, effectively turning the device into a refrigerator. Any leftover cold air is released back into the room, making the machine function as a water dispenser, refrigerator, and even an air conditioner—all in one.
Jin revealed that the idea came from the extreme drought in Chongqing last summer. He thought about using the principle of condensation between hot and cold air to generate water. The machine costs only around 600 yuan to build, and it uses about 8 kilowatt-hours of electricity per day, producing 20 kg of water. Even in arid regions like the desert, as long as there is power, it can still produce water. Jin has already applied for a new technology patent with the local intellectual property office, expecting approval by December.
In January of this year, Jin started working on the project. To fund his research, he sold part of his old computer and scavenged spare parts from discarded appliances. His first two prototypes failed, but the third one worked successfully. In September, a Zhejiang-based company offered 50,000 yuan to buy the patent rights, but Jin declined, preferring to start his own business instead.
Experts from the Municipal Water Resources Bureau praised the machine for being eco-friendly and innovative, but they noted that the technology is still in its early stages and needs further development before it can be widely used in daily life. Despite this, Jin’s invention shows great promise and could one day provide a sustainable solution for water-scarce regions.
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