The invention relates to the technical field of water purifiers and particularly relates to a water purifier without
wastewater. The water purifier without
wastewater comprises a pre-filter, a water inlet
solenoid valve, a
booster pump, a filter core mechanism and an RO film which are in turn connected through a
pipe, wherein the pre-filter is connected with a
raw water pipeline, a thick water outlet of the RO film is connected with a thick water outlet tube, a
circulating pump is arranged on the thick water outlet tube, the outlet end of the thick water outlet tube is respectively connected with a thick water return tube and a domestic water pipeline, the outlet end of the thick water return tube is connected with the outlet end of the
booster pump, and a
check valve is arranged on the thick water return tube; a normally closed
solenoid valve is arranged on the strong
discharge protective pipeline; a bypass pipeline is arranged between the
raw water pipeline and the domestic water pipeline; a water switch and a
check valve are arranged on the bypass pipeline; and the water switch, a normally opened
solenoid valve, the normally closed solenoid valve, the
booster pump and the
circulating pump are respectively electrically connected with an
electric control device. By using the water purifier, the thick water cannot be discharged in the pure
water production process so that the zero
wastewater discharge function can be reached; and the thick water can be reasonably used when the domestic water is used.