| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a strong abutment of a piston against a cylinder bore, supply a sufficient lubricant oil to a crank chamber side, and lengthen a duration of the moulding of a piston. SOLUTION: In this compressor 60, a piston 18 reciprocates in a cylinder bore 3 by a driving mechanism connected therewith through a connecting portion 19 in a crank chamber 5, a refrigerant gas is sucked into the cylinder bore 3 and compressed. The piston 18 comprises a piston head 18A, a piston body 18B, and recessed portion 18C forming a space 26 with the cylinder bore 3 and disposed between the piston head 18A and the piston body 18B. The space 26 communicates with a back portion side of the piston body 18B. During a compressing process, a strong abutment is prevented by providing through holes 18J, 18J for supplying the lubricating oil containing a portion of the refrigerating gas to the connecting portion 19, a sufficient lubricant oil is supplied to the crank chamber 5 side, and the life duration of the moulding of the piston 18 is lengthened and manufactured at a low cost.</p> |
