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 means 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 a water purification system having means for producing pure water, a holding tank for storing said pure water, pump means associated with said holding tank and being operable for discharging pure water therefrom, and a control, said control comprising: actuating means for actuating said pump means

A a water purification system having means for producing pure water, a holding tank for storing said pure water, pump means associated with said holding tank and being operable for discharging pure water therefrom, and a control, said control comprising: actuating means for actuating said pump means to discharge water from said holding tank; a conductivity sensing probe in said holding tank adapted to sense electrical conductivity at a predetermined level in said holding tank; circuit means responsive to said electrical conductivity sensed by said conductivity sensing probe for disabling operation of said pump means such that said pump means is not responsive to said actuating means when said electrical conductivity is less than or equal to a first predetermined value, for enabling operation of said pump means when actuated by said actuation means when said electrical conductivity is greater than said first predetermined value but less than a second predetermined value that is greater than said first predetermined value and for disabling operation of said pump means such that said pump means is not responsive to said actuation means when said conductivity is greater than or equal to said second predetermined value; whereby the control can help protect the pump means from damage resulting from operating said pump means when said pump means is dry and can help protect the system user from consuming water with too high of an impurity content.