Refrigerant compressor and freezer including same

A refrigerant compressor comprising:

• an electric component;
• a compression component driven by the electric component to compress a refrigerant;
• and
• a sealed container accommodating the electric component and the compression component, wherein:
• the compression component includes
• a shaft part rotated by the electric component and
• a bearing part slidingly contacting the shaft part such that the shaft part is rotatable;
• an inner peripheral surface of the bearing part includes
• a sliding surface,
• a chamfered surface provided closer to an end of the bearing part than the sliding surface in a center axis direction of the bearing part, and
• a corner between the sliding surface and the chamfered surface;
• an outer peripheral surface of the shaft part includes
• a sliding surface and
• a small-diameter portion which is provided closer to an end of the shaft part than the sliding surface of the shaft part in a center axis direction of the shaft part, is smaller in diameter than the sliding surface, and is opposed to the corner and the chamfered surface in a direction perpendicular to the center axis direction of the shaft part, the chamfered surface being adjacent to the small-diameter portion;
• the sliding surface of the shaft part includes a curved-surface portion having an outer diameter that continuously decreases in a curved shape toward the end of the shaft part in the center axis direction of the shaft part;
• and
• the small-diameter portion is connected to the curved-surface portion in a step shape.