METHOD FOR WASHING A PIPE OF A WATER PURIFIER CAPABLE OF PREVENTING WASHING LIQUID FROM REMAINING IN A PIPE OF A WATER PURIFIER BY MEASURING THE PH VALUE OF DRAINING PURIFIED WATER

摘要

PURPOSE: A method for washing a pipe of a water purifier is provided to reduce a time required to drain purified water by verifying whether washing liquid remains in a pipe.;CONSTITUTION: A method for washing a pipe of a water purifier comprises the steps of: locking a water supplying valve and opening a water draining valve and a washing valve in a washing liquid container by a control unit when a pipe washing mode is input (S20,S30); closing the washing valve a first preset period of time after opening the washing valve (S40); receiving a pH value of purified water which drains through the water draining valve and verifying the change of input pH values (S60); and supplying purified water by closing the water draining valve and unlocking the water supplying valve if there is no change in the pH values (S70,S80).;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Start; (CC,EE) No; (DD,FF) Yes; (GG) End; (S10) Pipe washing mode?; (S20) Lock a water supplying valve; (S30) Open a water draining valve; (S40) Close a washing valve a first set time after opening; (S50) Maintain the open state of the water draining valve; (S60) Is a pH measured value changed?; (S70) Close the water draining valve after a second set time; (S80) Release the locking of the water supplying valve