| 摘要 |
<p>A slant plate type compressor 10 has a plurality of cylinders 70 formed around the periphery of a cylinder block 21 and a piston 71 slidably fitted within each cylinder. A coupling mechanism drivingly couples a rotor 40 to the pistons 71 such that rotary motion of the rotor is converted into reciprocating motion of the pistons. The coupling mechanism includes a plate 50 having a surface disposed at a slant angle relative to the drive shaft and the slant angle changes in response to a change in pressure in a crank chamber 22 to change the capacity of the compressor. The compressor housing includes a rear end plate 24 defining suction 241 and discharge 251 chambers. A communication path 210,195-198 connects the crank chamber and the suction chamber. A valve control mechanism 19,80 controls the opening and closing of the communication path to cause changes of pressure in the crank chamber, the valve control mechanism including first 19 and second 80 valve control devices disposed within the communication path in series. The first valve control 19 device operates in response to pressure in the suction chamber 241 and the second valve control device 80 operates in response to an external signal. When pressure in the suction chamber falls below a predetermined value, the first valve control device 19 closes the communication path so that unusual decreasing pressure in the suction chamber, which might cause seizure of frictional members of the compressor, is prevented.</p> |
