| 摘要 |
PROBLEM TO BE SOLVED: To reduce man-hour and cost required for working fluid replacement by keeping deterioration of working fluid filled in a back pressure chamber side of the diaphragm pump with a simple structure. SOLUTION: This diaphragm pump 1A gives pressure pulsation to working fluid in the back pressure chamber 30A by a plunger 24A reciprocating and sliding by rotation of a cam 16 arranged in the cam chamber 40A, pressurizes and sends out main fluid in a main fluid camber 25A, and is provided with a communication path making communication between the back pressure chamber 30A and the cam chamber 40A in a plunger 24A. The plunger 24A is provided with an inlet communication path 241a opening at roughly bottom dead center position and introducing working fluid in the cam chamber 40A to the back pressure chamber 30A, and an outlet communication path 241b opening at roughly top dead center position and sending out working fluid in the back pressure chamber 30A to the cam chamber 40A. The working fluid is circulated between the back pressure chamber 30A and the cam chamber 40A by reciprocating sliding motion of the plunger 24A. COPYRIGHT: (C)2008,JPO&INPIT |
