| 摘要 |
PROBLEM TO BE SOLVED: To provide a miniaturized and safety pumping installation free from the electric shock by mounting a triode AC switch near a channel of a resin base which receives the flow water cooling effect during the pumping operation. SOLUTION: A channel for guiding the water pressured by a pumping portion to a cock 100 is formed on a resin base 10. A triode AC switch 7 which operates and stops a pumping installation by automatically switching a motor by the gate current from a control portion 21, is mounted near the channel of the resin base which receives the flow water cooling effect during the pumping operation. A temperature near the channel of the resin base 10 is kept at about 10-15 deg.C by the water temperature during the rotation of the motor. Accordingly the triode AC switch 7 is also cooled at about 10-15 deg.C at all times, and the rise of temperature can not be found even in the self-heat generation. As the triode AC switch 7 is mounted on the resin base 20 as an insulating material, the electric shock accident can be prevented even when the triode AC switch 7 is broken and the electricity is leaked. |
