The core working principle of the semiconductor refrigeration-based atmospheric water generator is to cool ambient air and liquefy water vapor contained in the air into fine droplets, so as to realize freshwater acquisition. Moist air, the water source for atmospheric water harvesting, exists ubiquitously on Earth.

It is easily accessible and can be directly processed into qualified freshwater. Compared with other water intake equipment, the atmospheric water generator requires no complex auxiliary devices. Featuring a compact structure and a minimal number of moving parts, it is highly portable and can be transported conveniently with personnel or vehicles. Therefore, atmospheric water harvesting is an optimal solution for distributed water supply systems.

Different from large-scale seawater desalination projects, water generators based on atmospheric water harvesting technology are more applicable to field scientific expeditions, military outposts and field troops, capable of meeting water demand in arid, semi-arid and island regions.

Structure and Working Principle of the Semiconductor Refrigeration-based Atmospheric Water Generator

The system of the device consists of an air pump, temperature and humidity sensors, a condensation chamber, a water collector and a water circulation unit. The water collector is integrated with components such as a laser device and a water depth sensor.

Ambient air is drawn into the condensation chamber by the air pump installed at the air inlet. The condensation chamber is thermally connected to semiconductor thermoelectric cooling chips, which continuously supply cooling capacity to lower the internal temperature of the chamber. The incoming air makes contact with cold-end fins inside the condensation chamber, generating heat and moisture exchange between the moist air and the cold fins.

Since the temperature of the moist air is higher than that of the cold-end fins, heat transfers from the air to the fins via convective heat transfer, which gradually cools down the moist air. When the air temperature drops to the dew point corresponding to its relative humidity, gaseous water vapor in the moist air condenses into liquid water and precipitates, adhering to the fin surfaces to form tiny droplets. As the droplets grow in volume, their gravitational force exceeds the adhesive force exerted by the fins. The droplets then fall off the fin surfaces and are collected by the water tank arranged underneath.

Utilizing the Peltier effect of semiconductors to achieve refrigeration and dew condensation for moisture extraction from humid air, this device features simple operation, low power consumption, resource conservation and zero pollution. It provides an innovative approach for freshwater acquisition in extreme and special environments.

Established in 2015, Huajing Co., Ltd. is a technology-oriented innovative enterprise integrating the research and development, production, sales and service of temperature control equipment. The company focuses on three core business segments:

1) semiconductor refrigeration technology;

2) vapor compression refrigeration technology;

3) flexible thermal conductive heating film application technology.

It provides turnkey technical solutions including 3D structural design, CAE thermal simulation analysis, and supporting electronic hardware and software development. The company’s products are widely applied in multiple industries, including consumer electronics, medical aesthetics, and industrial communication.

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