Atmospheric water harvesting device based on a semiconductor chilling plate and a preparation method thereof

An atmospheric water harvesting device based on a semiconductor chilling plate, wherein the device comprises:

• a water absorbing system comprising a first anti-gravity wicking material and a second anti-gravity wicking material, wherein semiconductor chilling plates are located between the first anti-gravity wicking material and the second anti-gravity wicking material;
• a semiconductor refrigeration system comprising a first semiconductor chilling plate and a second semiconductor chilling plate, wherein cold sides and hot sides of the first semiconductor chilling plate are respectively adhered to the first anti-gravity wicking material and the second anti-gravity wicking material, forming a hygroscopic area and a desorbing area on the first anti-gravity wicking material and the second anti-gravity wicking material, respectively;
• wherein the hot side and the cold side of the second semiconductor chilling plate are respectively jointed with the first anti-gravity wicking material and the second anti-gravity wicking material, forming another desorbing area and another hygroscopic area on the first anti-gravity wicking material and the second anti-gravity wicking material respectively;
• a current direction of the first semiconductor chilling plate and the second semiconductor chilling plate are periodically changed, so that an initial cold side is changed into the hot side, an initial hot side is changed into the cold side, correspondingly, an initial hygroscopic area is changed into the desorbing area, and an initial desorbing area is changed into the hygroscopic area;
• wherein the hygroscopic area of the first anti-gravity wicking material and/or the hygroscopic area of the second anti-gravity wicking material is coated with hygroscopic salt, and wherein a heat insulating material is arranged between the two semiconductor chilling plates;
• and
• a temperature control system for controlling the temperature of cold sides and/or hot sides of the semiconductor chilling plates;
• wherein the cold sides of the semiconductor chilling plates are used for reducing or maintaining the temperature of a part of the water absorbing system, the hot sides of the semiconductor chilling plates are used for increasing or maintaining the temperature of another part of the water absorbing system, and the cold sides and the hot sides of the semiconductor chilling plates can be switched to realize circulating continuous atmospheric water harvesting.