초록 ▼

A distillation type of water purification system has a raw water inlet valve for admitting raw water continuously to a boiling tank at a rate greater than the rate at which raw water is converted to treated water. A drain valve located at the bottom of the boiling tank is energized by a raw water le

A distillation type of water purification system has a raw water inlet valve for admitting raw water continuously to a boiling tank at a rate greater than the rate at which raw water is converted to treated water. A drain valve located at the bottom of the boiling tank is energized by a raw water level sensing device whenever the raw water level reaches a predetermined level, to discharge water from the boiling tank. Treated water is stored in a storage tank having a pump for discharging treated water to the user upon demand. A single conductivity sensor in the storage tank controls the pump to allow it to operate only if the sensed conductivity is above a first predetermined value but not at or above a second predetermined value greater than the first value. An improved condenser has two sets of tubes, each set is arranged in a pair of planes oriented transverse the flow of cooling air with the tubes parallel. The internal cross-sectional area of one set is about twice that of the other. Steam and condensate flows serially through the larger diameter tubes and then through the smaller diameter tubes in a flow countercurrent to the cooling air stream.

대표청구항 ▼

A method of operating a water purification system having a boiling tank, heating means for converting raw water in said boiling tank to steam at a predetermined conversion rate, condensing means for converting said steam to pure water, and means for conveying steam from said boiling tank to said con

A method of operating a water purification system having a boiling tank, heating means for converting raw water in said boiling tank to steam at a predetermined conversion rate, condensing means for converting said steam to pure water, and means for conveying steam from said boiling tank to said condensing means, said method including purging raw water and contaminants from the boiling tank in small, frequent batches by performing the steps of: continuously admitting raw water to said boiling tank from a raw water source at a constant first predetermined rate that is significantly greater than said conversion rate; sensing the level of raw water in said boiling tank; producing a first signal during said step of sensing when raw water is below a predetermined level in said tank; producing a second signal during said step of sensing when raw water is at or above said predetermined level in said tank; and discharging raw water from said boiling tank in response to said second signal; and not discharging water from said boiling tank in response to said first signal.