Refrigerant compressor, and refrigerating machine using the same

A refrigerant compressor comprising:

• a closed container;
• a compressor section, which is accommodated in the closed container, for compressing refrigerant;
• a driver for driving the compressor section;
• and
• a plurality of contact sections including first contact section and a second contact section to be brought into contact with each other or slid with each other by driving the compressor section,
• wherein at least one of a plurality of spherically shaped recesses is formed on a surface of at least one of the first contact section and the second contact section, and
• wherein the at least one spherically shaped recess is (a) shaped sufficiently for causing a distance between the contact sections to remain constant as the contact sections move with respect to each other and (b) configured for causing oil to form a vortex flow in the one spherically shaped recess and the oil is retained in the at least one recess.