| 摘要 |
<p>PURPOSE:To keep pressure in the crank chamber of a variable capacity compressor always at a predetermined level for good response and improve the controllability of capacity by letting said pressure control each open/close valve at a passage between the crank chamber and the delivery chamber, and between the crank chamber and the suction chamber. CONSTITUTION:A primary open/close valve 34 is provided at an air feed passage 35 between the crank chamber 7 of a variable capacity compressor used for the airconditioning of vehicles and the like, and the delivery chamber 5 thereof. Also, a secondary open/close valve 39 is provided at a bleed passage 40 between the crank chamber 7 and the suction chamber 4 of said compressor. Both of said valves 34 and 49 are controlled for opening and closing by a single actuating lever 25 through the application of pressure in the crank chamber 7 to a bellows 34. And the opening and closing control is so made that the primary open/close valve 34 opens and the opening of the secondary open/close valve 39 is throttled, when pressure in the crank chamber 7 is equal or below a predetermined level. On the contrary, when said pressure is above the predetermined level, the primary open/close valve 34 closes and the opening of the secondary open/close valve 39 is made wide.</p> |
