Abstract: A pressure balancing system for two sides of an electrodialysis reversal (EDR) film stack includes two source water inlets, an EDR film stack, four pressure sensors, a variable speed pump, a one-way valve, a clean water outlet, a waste water outlet, and a control system module. With the four pressure sensors detecting water pressures at four ports on two sides of the EDR film stack and with the variable speed pump and the control system module adjusting water pressure at the waste water outlet, water pressure at the clean water outlet is equivalent to the water pressure at the waste water outlet. Accordingly, the water pressures on the two sides of the EDR film stack can be balanced, and service life and water purification efficiency of the EDR film stack can be improved.

Abstract: A water conditioning system of an electrodialysis reversal (EDR) water purifier includes a first source water inlet, a second source water inlet, an EDR film stack, a first conductive probe, a second conductive probe, a third conductive probe, a fourth conductive probe, a variable speed pump, a one-way valve, a clean water outlet, a waste water outlet, an electrode A, an electrode B, and a control system module. With the four conductive probes detecting conductivity of water flowing through four ports on two sides of the EDR film stack and by sending detected data to the control system module, the control system module adjusts voltages of the electrode A and electrode B accordingly to instantly increase or decrease removal efficiency of the EDR film stack. Thus, the conductivity of the discharged clean water and the quality of the clean water can be stabilized.