PUMP, AND LIQUID SUPPLY DEVICE PROVIDED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a pump capable of pouring amount of chemicals to be added by an addition unit in accordance with flow rate of discharged liquid with high precision always and to provide a liquid supply device provided with the pump. SOLUTION: This pump is provided with a pressure sensor 5 arranged in a discharge passage 4a in which liquid discharged from a pump part 1 flows, a current detection part 8 for detecting current in a motor part 2, and the addition unit 10 for adding a predetermined substance to the liquid flowing in the discharge passage 4a. A control part 7 drives the motor part 2 when pressure detected by the pressure sensor 5 is below a predetermined value and sets output of the motor part 2 to a predetermined value so that pressure is maintained at predetermined pressure when a current value detected by the current detection part 8 is less than a predetermined value. COPYRIGHT: (C)2006,JPO&NCIPI