Patent ID: 7955503

Claim:
A pure water producing apparatus for treating raw water, comprising: a filtration device receiving the raw water, a water supply pump connected to the filtration device and receiving the raw water, a reverse osmosis device attached to the water supply pump and treating the raw water supplied from the water supply pump, a first water quality sensor including a first water temperature sensor, through which the raw water from the reverse osmosis device passes, an electrodeionization device attached to the first water quality sensor, through which the raw water passes to produce pure water, a second water quality sensor including a second water temperature sensor, through which the pure water passes, and a controlling device connected to the first and second water temperature sensors, the controlling device controlling at least one of an amount of water supplied to the reverse osmosis device and an amount of water supplied to the electrodeionization device on a basis of the first and second water temperature sensors so that at least one of an amount of water passing through the reverse osmosis device, an amount of deionized water output from the electrodeionization device, and quality of produced pure water is maintained constant.