| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a setting space by arranging a three way valve for switching a flow-in passage selectively on the flow-in port side of a pump device for pressurizing a fluid by rotation of a motor. SOLUTION: A pump case 10 is assembled on one side of an impeller case 25, and a three way valve is arranged on the other side of the impeller case 25. A flow-out port 29 for discharging a fluid which is compressed is formed on the lower end of the impeller case 25. A first flow-in port and a second flow-in port 21 are arranged on the upper end of the three way valve at a prescribed angle. The first flow-in port and the second flow-in port 21 are fixed to a ball case 23, and a pair of load switch 46 is installed on the outer side surface of the ball case 23. In the case where the first flow-in port and a flow-out port 29 are communicated with each other, a power supply is applied by the load switch 46. In the case where the second flow-in port 21 and the flow-out port 29 are communicated with each other, a power supply is applied by the load switch 46. It is thus possible to reduce the number of the manufacture work of a boiler, and also it is possible to improve a productivity.</p> |
