| 摘要 |
A rotation switching mechanism in a rotary type switching valve comprises a rotor serving as a movable switching valve, a pressure receiving portion disposed at an eccentric position of the rotor and rotatable in unison with the rotor, a first electromagnet and a second electromagnet placed opposite the first electromagnet with the pressure receiving portion situated therebetween. The first and second electromagnets are formed of one-way bias type electromagnets having no return springs. By supplying electric current to a selected one of the first and second, electromagnets, a slider of the selected electromagnet is caused to advance to press the receiving portion so that the rotor is rotated in one direction, whereas a slider of the non-selected electromagnet is caused to retreat due to being pressed by the pressure receiving portion.
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