Piston type oxygen-increasing machine

The invention discloses a piston type oxygen-increasing machine. The piston type oxygen-increasing machine comprises a base, wherein a motor and a cylinder are mounted on the base, a piston is arranged in the cylinder, a connecting rod extending outside the cylinder is connected to the piston, a first air outlet pipe and a second air outlet pipe are arranged at one end of the cylinder, and a first air inlet and a second air inlet are formed in the other end of the cylinder; an air outlet one-way valve is mounted in the first air outlet pipe and the second air outlet pipe, an air inlet one-way valve is mounted in the first air inlet and the second air inlet; the first air outlet pipe and the second air outlet pipe are connected with a plurality of micropore air pascals separately through air delivery pipes; the motor is connected with the free end of the connecting rod through a crank transmission mechanism. According to the piston type oxygen-increasing machine structure, the motor drives a piston to make reciprocating action, and alternate air delivery can be performed through the first air outlet pipe and the second air pipe of the cylinder, so that the oxygen increasing efficiency can be greatly improved. The piston type oxygen-increasing machine has a favorable oxygen-increasing effect, and is favorable for improving the breeding quality of fish ponds.