LIQUID LIFTING DEVICE AND LIQUID LIFTING METHOD

摘要

[Problem] To provide a liquid lifting device and a liquid lifting method that make it possible to use an air pump to lift a liquid to a height that is equal to or higher than the height to which the pump is capable of lifting the liquid. [Solution] A liquid lifting device (1) is provided with: a liquid supply section (2) in which a liquid is stored; a tank (4) that is provided to a position that is higher than the liquid supply section; a liquid lifting pipe (3) having one end that is inserted into the liquid within the liquid supply section and another end that is connected to the tank; an air pump (10) that decompresses the inside of the tank; an air supply pipe (6) having one end section that is connected to an intermediate position in the liquid lifting pipe via a branching section (5) and another end section comprising an upright section that rises upward from the one end section; and an air valve (7) that is provided to the other end section of the air supply pipe and that can be opened and closed with respect to the outside air. The height (h1) from the liquid surface in the liquid supply section to the other end of the liquid lifting pipe is higher than the height (h0) to which the air pump is capable of lifting the liquid. The height (h2) from the liquid surface in the liquid supply section to the branching section is lower than the height (h0) to which the air pump is capable of lifting the liquid.