Compressor having pulsating reducing mechanism

Claim 1

A compressor having a pulsating reducing means, said compressor comprising: a cylinder block having a plurality of cylinder bores therein; a plurality of pistons slidable in said cylinder bores; means connected to said pistons for driving said pistons with a predetermined phase difference between the strokes of the respective pistons; a valve plate on one end of said cylinder block and having a plurality of sets of at least one suction hole and at least one discharge hole, one set being positioned over the end of each of said cylinder bores; a suction valve in each suction hole for opening and closing said suction hole; a discharge valve in each discharge hole for opening and closing said discharge hole; a hollow cylinder head on said one end of said cylinder block over said valve plate and sandwiching said valve plate between it and said one end of said cylinder block; said cylinder head having a discharge opening therein and a partition plate therein partitioning said cylinder head into a first high pressure chamber into which said discharge holes open and a second high pressure chamber out of which said discharge opening opens, and said partition plate having a communicating hole therein communicating said first high pressure chamber and said second high pressure chamber, the diameter D 1 of the smallest cross section of said discharge holes, the diameter D 2 of said communicating hole and the diameter D 3 of said discharge opening being in the relationship D 1 >D 2 >D 3 .