Reciprocating compressor

摘要

A reciprocating compressor includes a front-side delivery chamber 18 a formed at a front-side cylinder head 6 , a rear-side delivery chamber 18 b formed at a rear-side cylinder head 8 , a plurality of delivery passages 12 a and 12 b formed at cylinder blocks 2 and 4 and an outlet port 16 that communicates between one of the delivery passages and an external circuit. The other delivery passage 12 b that is not in communication with the outlet port 16 is made to communicate with the front-side delivery chamber 18 a and the rear-side delivery chamber 18 b and is also made to communicate with the delivery passage 12 a in communication with the outlet port 16 via a guide passage 17 . The delivery passage 12 a in communication with the outlet port 16 is made to communicate with either the front-side delivery chamber or the rear-side delivery chamber via a constricted portion 40 having a passage section smaller than the passage sections at positions at which the other delivery passage 12 b communicates with the delivery chambers 18 a and 18 b, and the dimensions of the constricted portion are set so that its area is equal to or smaller than the area of a circular section with a diameter of 1.5 mm. The reciprocating compressor adopting the structure described above makes it possible to reduce the extent of discharge pulsation and ultimately reduce vibration and noise.