| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a capacity control valve of a duty ratio control for a variable displacement compressor, hardly causing resonance phenomenon of a valve element in the vicinity of a valve seat. <P>SOLUTION: The valve element 8 of a valve part 1 controls the opening and closing of a passage between a port 5 for introducing a refrigerant with discharge pressure Pd and a port 6 for leading out a refrigerant with controlled pressure to a crank chamber. A shaft 12 transmits the energizing force of a solenoid 2 to the valve element 8 against the energizing force of a spring 9 energizing the valve element in the valve closing direction. The valve element 8 and the shaft 12 are fitted to each other with a radial very small clearance to move substantially in mutual close adhering state in the axial vibration depending on the frequency of a pulse current. Thus, the axial vibration of the valve element 8 is restrained so that stable operation value is always obtained extending over the whole working region, and resonance phenomenon of the valve element 8 is restrained to improve durability. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
