| 摘要 |
<p>PURPOSE: To improve a volume efficiency of a compressor by constituting a flow-out hole for making refrigerant gas in a cylinder flow out to a low pressure side in a front surface of a piston so as to include sealing means for sealing the flow-out hole having prescribed elastic force. CONSTITUTION: Refrigerant gas of a suction chamber arranged backward a discharge chamber 222 flows into a cylinder 200 through an intake port 231 while opening an intake valve 233 with reverse travel of a piston 210. With forward travel of the piston 210, refrigerant gas is compressed in a high temperature and high pressure, a discharge valve 234 is opened with this pressure, and compressed refrigerant gas is discharged to the discharging chamber 222 through a discharge port 232. In the case where excessive compression is generated, a plug 310 is reverse-traveled with excessive compression, a hole 300 is opened, and excessive compressed refrigerant gas is exhausted in a container outside the cylinder 200. The piston 210 is advanced, a tip end of the plug 310 approaches a valve plate 230, and it is brought into contact with the valve plate 230, and the plug 310 is reverse traveled against elasticity of an elastic member 320 by advancing the piston 210, and thereby, the hole 300 is opened. High pressure remaining refrigerant gas which remaining in an extra volume without discharging through the discharge port 232 is discharged in a container.</p> |
