| 摘要 |
PURPOSE:To improve quick cooling performance by making pressure of a crank chamber lower than pressure of the inlet side by way of introducing a principle of an injection pump to a mechanical part to generate pressure of the crank chamber. CONSTITUTION:A control valve 2 of a capacity control device of a compressor consists of a pressure displacement intensifying part 3, a displacement transmission part 13, a high pressure correction part 23 and a crank chamber pressure generation part 24. An injection valve 32 is provided between a chamber 35 communicated through to a discharge chamber 40 and a chamber 36 communicated through to a crank chamber 41. Additionally, a valve seat 34 and a ball 39 are arranged between the chamber 36 and a chamber 37 communicated through to an inlet chamber 42, and when the valve seat 34 is open, pressure in the crank chamber 41 is made lower than pressure on the inlet side by generating negative pressure in the chamber 36 by means of injection at the time of cooling from an injection nozzle 32. In this way, cooling performance at the time to start cooling is improved. |
