초록 ▼

“A water purification system has a reverse osmosis filtration unit which receives feed water from a feed water valve and separates it into product water and waste water. A reservoir has a movable separator dividing it into a product water chamber for receiving the product water and a control water c

“A water purification system has a reverse osmosis filtration unit which receives feed water from a feed water valve and separates it into product water and waste water. A reservoir has a movable separator dividing it into a product water chamber for receiving the product water and a control water chamber. The product water is delivered to an outlet connection from the product water chamber or directly from the filtration unit. A regulator is connected to the waste water outlet port of the filtration unit, the control water port of the reservoir, and a drain line. The regulator has a first valve for providing waste water from the filtration unit to the control water port of the reservoir for urging the separator toward the product water chamber. The regulator has a second valve that can rapidly drain water from the control water chamber of the reservoir and rapidly reduce pressure in the control water chamber, thus facilitating the refilling of the product water chamber. A relief valve downstream of the second valve maintains a low pressure in the system to avoid undesirable cycling of the system between high pressure and low pressure.

대표청구항 ▼

In a water purification system comprising: a filtration unit for separating feed water into product water and waste water, the unit having (1) a feed water inlet port for receiving a supply of feed water, (2) a product water outlet port, and (3) a waste water outlet port; a drain line for conveying

In a water purification system comprising: a filtration unit for separating feed water into product water and waste water, the unit having (1) a feed water inlet port for receiving a supply of feed water, (2) a product water outlet port, and (3) a waste water outlet port; a drain line for conveying waste water from the waste water port to a drain; a reservoir having a movable separator dividing the reservoir into a product water chamber and a control water chamber, the reservoir having a product water port communicating with the product water chamber and a control water port communicating with the control water chamber; an outlet connection for end use discharge of product water; and means providing fluid communication between the product water outlet port of the filtration unit and the product water port of the reservoir and with the outlet connection so that product water from the unit can be provided to the product water chamber of the reservoir and thereby tend to increase pressure in the control water chamber or product water can be provided from the product water chamber of the reservoir to the outlet connection and thereby tend to decrease the pressure in the control water chamber; the improvement comprising: regulating means connected to (1) the waste water outlet port of the filtration unit, (2) the control water port of the reservoir and (3) the drain line, the regulating means having means responsive to pressure conditions in the control water chamber (1) for connecting the waste water outlet port of the filtration unit to the control water port in response to a decrease of the pressure in the control water chamber below a first pressure and (2) for connecting the control water port to the drain line in response to an increase in the pressure in the control water chamber above a second pressure higher than said first pressure.