| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve performance by securing a sufficient amount of refrigerant to be jetted into a compression chamber from an economizer circuit, and to reduce noise due to pressure pulsation of the refrigerant. <P>SOLUTION: A screw compressor (10) is provided with an economizer circuit (70) for jetting an intermediate pressure refrigerant into a compression chamber (23) under the compression. The economizer circuit (70) comprises a branch passage (71) by which the intermediate pressure refrigerant is branched in the middle of a refrigerant circuit (1), resonance space (72) which is connected to the downstream side of the branch passage (71) so as to stagnate the intermediate pressure refrigerant, and a resonance passage (73), one end of which communicates into the compression chamber (23) and the other end of which extends so as to be protruded into the resonance space (72). <P>COPYRIGHT: (C)2012,JPO&INPIT |
