Abstract: A control method of a control system for controlling water purification module for processing water on two sides of a reverse osmosis membrane. The control system has a water purification module and a control module. The water purification module has a preliminary filter and a reverse osmosis filter. The control module regularly controls the purification and the drainage of the water purification module, and solves the problem that the TDS value of the water on both sides of the reverse osmosis membrane is too high after the water purifier is on standby for a period of time. The control system regularly drains high concentration water on both sides of the reverse osmosis membrane to improve water purification efficiency.

Abstract: A purified water supply pipeline system is provided. Source water flows from a source water inlet to a front filtration module, an inlet solenoid valve, a booster pump, and a main filtration module and is separated into purified water and waste water. The purified water flows through a first one-way valve to a rear filtration module and then flows to a purified water pipeline, on which a water outlet faucet is mounted. The waste water flows to a waste water pipeline, on which a waste water throttling element and a waste water outlet are disposed. The purified water also reflows to the main filtration module through a switch solenoid valve and the booster pump, to form a reflow pipeline. The purified water supply pipeline system balances concentration difference on both sides of the main filtration module. Accordingly, quality of the purified water and user experience are improved.

Abstract: A purified water supply pipeline system is provided. Source water flows from a source water inlet to a front filtration module, an inlet solenoid valve, a booster pump, and a fine filtration module and is separated into purified water and waste water. The purified water flows through a first one-way valve to a rear filtration module and then flows to a purified water pipeline, on which a water outlet faucet is mounted. The waste water flows to a waste water pipeline, on which a waste water throttling element and a waste water outlet are disposed. The purified water also reflows to the fine filtration module through a switch solenoid valve and the booster pump, to form a reflow pipeline. The purified water supply pipeline system balances concentration difference on both sides of the fine filtration module. Accordingly, quality of the purified water and user experience are improved.

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.

Abstract: A switching system has two inlet ends, two outlet ends, and an EDR membrane stack. Each inlet end and each outlet end are connected to both a primary branch and a secondary branch. Solenoid valves are mounted on each primary branch and each secondary branch to switch between opening and closing. The EDR membrane stack has two inlets, two outlets, and two electrodes. One inlet is connected to the primary branch of the two inlet ends while the other is connected to the secondary branch of the two inlet ends. One outlet is connected to the primary branch of the two outlet ends while the other is connected to the secondary branch of the two outlet ends. The polarity of the two electrodes is interchangeable to realize the reverse polarity of the electrodes. The two water flows that pass through the EDR membrane stack are interchangeable.

Abstract: A switching system for an EDR water purifier has a first raw-water inlet end, a second raw-water inlet end, two four-way solenoid valves, an EDR membrane stack, a freshwater outlet end, and a wastewater outlet end. Each four-way solenoid valve has a first inlet end, a second inlet end, a first outlet end, and a second outlet end. The first inlet end of each four-way solenoid valve can communicate with one of the first outlet end and the second outlet end of the same four-way solenoid valve, and the second inlet end of the same four-way solenoid valve can communicate with the other one of the first outlet end and the second outlet end, to execute water-route switching. By switching two water routes passing through the EDR membrane stack, forming of limescale is alleviated, lifespan of the EDR membrane stack is extended, and water-purifying efficiency is improved.

Abstract: A switching system of an EDR water purifier has a first inlet end, a second inlet end, a first three-way solenoid valve, a second three-way solenoid valve, a third three-way solenoid valve, a fourth three-way solenoid valve, an EDR membrane stack, a first outlet end, and a second outlet end. The EDR membrane stack has a first inlet port, a second inlet port, a first outlet port, a second outlet port, a first electrode, and a second electrode. Each three-way solenoid valve has an inlet opening, a first outlet opening, and a second outlet opening. Each outlet opening of each three-way solenoid valve can be turned open or closed for switching two water routes passing the EDR membrane stack. Therefore, speed of forming limescale decreases, lifespan of the EDR membrane stack is prolonged, and water-purifying efficiency is improved.

Abstract: A control system has a water purification module and a control module. The water purification module has a preliminary filter and a reverse osmosis filter. The control module regularly controls the purification and the drainage of the water purification module, and solves the problem that the TDS value of the water on both sides of the reverse osmosis membrane is too high after the water purifier is on standby for a period of time. The control system regularly drains high concentration water on both sides of the reverse osmosis membrane to improve water purification efficiency.