| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the noise in the opening and closing operation of a discharge port by mounting a valve sliding between a first position for closing the discharge port and a second position for opening the discharge port, an operating means for moving the valve to the second position in interlocking with the fluid pressure of a compression chamber, and a guide for guiding the sliding of the valve. SOLUTION: A valve member 51 comprises an opening portion 51a for communicating a discharge port 31a of an upper flange 31 with the discharge space 10a, and a closing portion 51b. A plate spring 52 is mounted on an operation hole 37 communicating with a compression chamber 33a of a cylinder 33 for supporting the valve member 51 in the closed state by the elastic force. The operation hole 37 comprises a first expansion part 60 on the lower side, a second expansion part 62 on the upper side and a neck portion 64. When the pressure of the compression chamber 33a is increased from this initial state, the plate spring 52 moves he valve member 51 while deformed in the opposite direction to bring the opening state. The guide 52 prevents the valve member 51 from releasing from the upper flange 31 and flowing in the width direction.</p> |
