Device for flushing reverse osmosis membrane of water purification machine

The utility model discloses a device for flushing a reverse osmosis membrane of a water purification machine. The device comprises a water pump of the water purification machine, and a control unit, wherein the control unit comprises a first diode, a switch tube and a power supply, the positive power input end and the negative power input end of the water pump form a closed loop with the power supply through the switch tube, and the control electrode of the switch tube is connected with the pulse signal output end of a pulse signal source; the negative power input end of the water pump is also connected with the positive electrode of the first diode, and the negative electrode of the first diode is connected to the positive power input end of the water pump. According to the device, by arranging the control unit for switching a full-power operating mode and a non-full-power operating mode of the water pump, the water pump produces wavy flushing water for flushing the surface of the reverse osmosis membrane of the water purification machine, so that dirt on the surface of the reverse osmosis membrane is flushed away relatively easily, so that the work efficiency of the water purification machine is greatly improved and the service life of the reverse osmosis membrane is prolonged.