| 摘要 |
PURPOSE:To improve the performance and reliability of a cooling meidum compressor of the type having the top of a piston projected into discharge ports, by increasing the coefficient of performance and lowering the temperature of various parts of the compressor by lowering the rate of over-compression of a coolant gas. CONSTITUTION:Connecting ports 15 are formed for comunicating the outer conical surface 14a and the inner conical surface 14b of a projection 14 of a piston 13 with each other. since coolant gas compressed between the lower surface of suction valves 10 and the peripheral portion of the piston 13 is passed through a clearance A snd connecting ports 15 to discharge ports 9 as shown by arrows in the drawing, the velocity of gas passing through the clearance A is lowered. This results in reduction of the flow resistance at the clearance A and hence the rate of over-compression of the coolant gas, so that the temperature of various constituent parts of the compressor can be lowered. |
