The present invention is liquid circulation device comprises group of water tank and circulation device.The group of water tank has at least two or more tank bodies.Among tank bodies are provided with circulation device.The circulation device comprises water level different tube and negative pressure tube.The level different tube let liquid flow downwards.The air in negative pressure tube will naturally flow from area with higher pressure to area with low pressure.Thus liquid will flow upward.The present invention can save energy and has environmental benefits.本發明係有關一種液體循環迴流裝置,主要包含有水槽組與迴流裝置所構成,該水槽組至少具有二個以上的槽體,且其中一槽體的水平位置較高,槽體有容室可供盛裝液體,而槽體之間設置有迴流裝置,該迴流裝置至少具有位差迴流管與負壓迴流管,位差迴流管與負壓迴流管各別連接至二個槽體內,位差迴流管可利用高低位差使位置高的槽體內的液體流至位置低的槽體內,另外,負壓迴流管係藉由氣體於管內形成負壓,進一步將位置低的槽體內的液體流至位置高的槽體內,經此,成一循環流通的系統,該方式可節省大量的能源,極具環保效益者。1...水槽組11...槽體111...底架12...容室2...迴流裝置21...位差迴流管22...負壓迴流管23...漸擴管口24...進氣管25...曝氣端26...打氣裝置3...液體
