Bubble-fountain-type water circulation device

An impeller for a bubble-fountain-type water circulation device, in which the bubble-fountain-type water circulation device includes:

• a suction pipe installed underwater in a reservoir (or a lake) ;
• a main body housing fixedly installed at an upper end of the suction pipe;
• an impeller connected to the suction pipe;
• and a fixing plate perforated with a hole having a predetermined size, and disposed at an open upper end of the main body housing, so that deep water sucked up from an underwater portion of the reservoir (or the lake) is mixed with external air through a distribution plate so as to increase oxygen saturation, and dispersed on surface water, the impeller comprising:
• an impeller shaft;
• and
• an impeller plate,
• wherein a lower end of the impeller shaft is bearing-fixed onto a shaft support fixed to a bottom surface of the fixing plate, the impeller shaft is fixed to a center of the impeller plate, the shaft support is disposed within the main body housing, the impeller plate is disposed at a hole formed at a center of the distribution plate, and a horizontal blade and a vertical blade are formed on a bottom surface of the impeller plate,
• the horizontal blade is formed in a rearward shape (backward curve) at a predetermined height on the impeller plate and inclined upward from a specific point to an inner edge, and the vertical blade is attached to an inclined surface formed on an inner edge portion of the horizontal blade, and
• the vertical blade sucks in the deep water so as to guide the deep water to the horizontal blade, and the horizontal blade disperses the deep water.

An impeller for a bubble-fountain-type water circulation device, the impeller comprising:

• an impeller plate,
• wherein a horizontal blade and a vertical blade are formed on a bottom surface of the impeller plate,
• the horizontal blade is formed in a rearward shape (backward curve) at a predetermined height on the impeller plate and inclined upward from a specific point to an inner edge, and the vertical blade is attached to an inclined surface formed on an inner edge portion of the horizontal blade, and
• the vertical blade sucks in the deep water so as to guide the deep water to the horizontal blade, and the horizontal blade disperses the deep water.