| 摘要 |
PURPOSE:To secure a rapid pressure drop in a low pressure side port which becomes a driving force for opening a high pressure valve by providing a disk type high pressure valve which can simultaneously close both ports of a high pressure side inlet and a high pressure side outlet on one side while which can close a low pressure side port on the other end face. CONSTITUTION:When starting, a crankshaft 54 is rotated by electrifying a motor-driven element 52, causing a pressure drop in the low pressure chamber 61 of a compression chamber 60. A disk type high pressure valve 77 can close a high pressure side inlet port 72 and a high pressure side outlet port 74 simultaneously on one side while it can close a low pressure side port 72 on the other side. And, even though the clearance between the valve 77 and a valve cylinder 75 is relatively rough, since the high pressure side inlet port 72 is closed, the pressure drop can be securely carried out in a very short time. This pressure drop naturally causes pressure drops in a pressure introducing passage 79, the low pressure side port 76, and the valve cylinder 75. And, a pressure difference between pressure in the high pressure side inlet port 72, i.e., an enclosed container 51 and pressure in the valve cylinder 75, acts on the high pressure valve 77, enabling a secure and rapid valve opening operation.
|
