| 摘要 |
<p>Disclosed is a pressure-sensitive control valve which reliably minimizes the capacity of a variable capacity compressor in an unload operation without using a magnet clutch, etc., and reduces the size of the variable capacity compressor. A pressure-sensitive bellows (16) is disposed within a bellows storage chamber (13). A ball (11a) is abutted against the pressure-sensitive bellows (16), to open or close a valve body (9) via a stem portion (11). The biasing force of a plunger spring (36) is set to be larger than the biasing force of a valve closing spring (15). When an electromagnetic coil device (30) is not energized, the pressure-sensitive bellows (16) is abutted against a valve main body via a plunger (35) by the biasing force of the plunger spring (36). Depending on the variation of a suction pressure (Ps) within the bellows storage chamber (13), the pressure-sensitive bellows (16) is expanded or contracted with respect to the abutment portion with the valve main body, functioning as a fixed point, so that the plunger (35) is freely moved, but the valve body (9) is not moved, and thus, the unload operation is maintained. Alternatively, when the electromagnetic coil device is energized, the pressure-sensitive bellows (16) is expanded or contracted with respect to the abutment portion with the valve main body, functioning as a fixed point, to maintain the unload operation.</p> |
