| 摘要 |
<p>PURPOSE:To make an actuator for an electromagnetic value for capacity control in a cooling medium compressor of a changeable capacity type compact and its cost low by composing it to drive a subject part by displacing a pressure- based follower member by thermal expansion or heat shrinkage of enclosed gas. CONSTITUTION:For a capacity-changeable compressor 1, an inclined plate 35 is rotated through a shaft 15, a wobble 31 by drive rotation of a pulley 11 to reciprocate a piston 39 through a connecting rod 37 in a cylinder 13, so cooling medium sucked from a suction chamber 61 into a cylinder chamber is compressed and discharged from a discharge chamber 63. In this case, an actuator 200 is provided for control by capacity control of a stroke of the piston 39, or a pressure in a pressure chamber 25. This actuator 200 energizes a thermoelectric element 204, and cool and condense the cooling medium in a bellow phragm 203 to shrink the bellow phragm 203 and close a ball valve 202, setting the side of the bellow phragm 203 for a heat suction part, and the side of a heat exchanger 26 for a heat radiation part.</p> |
