| 摘要 |
PURPOSE:To reduce a gas temperature in a discharging area effectively by a method wherein gas, having a temperature lower than the discharging gas temperature upon full load operation, is blown off into the discharging area including a discharging chamber and a compression chamber, communicated to the discharging chamber at all times. CONSTITUTION:During effecting no-load operation, in which a suction chamber valve 5 is closed and a discharging chamber releasing valve 15 is opened to make both of a suction chamber pressure and the discharging chamber pressure less than respective pressures upon full-load operation, a part of gas of rear flow of an after cooler 8 is blown off into the discharging area including the discharging chamber and the compression chamber. According to this constitution, the low-temperature gas is blown off into the discharging area, whose temperature is to be reduced, without passing through the compression chamber, therefore, the pouring gas will never generate a compression heat due to the compression and the gas temperature in the discharging area may be reduced effectively. |
