A method of water extraction from air and a device for its realization.

RU patent № 2191868

The invention is related to the field of technique which is intended for producing water from the atmospheric air using artificial cold. The proposed method and the device can be used for producing fresh water with lack of access to natural sources of water, including arid zones.
The objective of the invention is development of a method and a device to extract water from the air while reducing specific indices as to power consumption, mass, dimensions and the cost of equipment if compared to common methods and devices.
The method involves formation of an air flow containing water vapours, the preliminary cooling of air by a circulating water flow, the cooling of air down to a temperature below the dew point, removal of the formed condensate, cooling the circulating water and the condenser of cooling unit by the dessicated air. As compared to the common method, the preliminary cooling of water is integrated with increasing its relative humidity via a direct contact of the air with the circulating water flow, and a part of produced condensate is removed to the circulating water flow.
The device for realization of the method comprises a channel with a fan for formation and transportation of the air containing water vapours, in which sections of heat exchanger are arranged in the direction of the air flow, which are separated by the cooling element of a refrigerating machine, a condenser of the refrigerating machine, a condensate receiver communicating with a part of the channel, a circulating pump with a pipeline. In contrast to the common device, the first section of heat exchanger in the direction of air flow is fitted with a sprinkler which is connected by a pipeline to the second section of heat exchanger, the circulating pump and the condensate receiver.