Ion exchanger

The invention discloses an ion exchanger. The ion exchanger comprises a body, a regenerated liquid feeding tube and a regenerated liquid discharging tube, the regenerated liquid feeding tube is connected to the top end of the body, and the regenerated liquid discharging tube is connected to the bottom end of the body, wherein the regenerated liquid discharging tube comprises a discharging adapter and an inverted U-shaped tube, one end of the inverted U-shaped tube forms a discharging opening, the other end of the inverted U-shaped tube is connected with the body through the discharging adapter, and the inverted U-shaped tube is provided with an air vent. The inverted U-shaped tube of the regenerated liquid discharging tube is provided with the air vent to destroy the siphon phenomenon of the inverted U-shaped tube in order to make the whole ion exchanger be full of a regenerated liquid and the regenerated liquid flow and be regenerated, so the regeneration effect is improved, the regeneration qualification ra