Valve device of compressor, and sealed compressor including valve device

A valve device of a compressor, comprising:

• a plate having a communication hole communicated with a compression chamber within which a piston is reciprocatable;
• a plate-shaped reed for opening and closing the communication hole;
• and
• a stopper which is disposed to cover the reed and defines an opening degree of the reed;
• wherein the reed includes:
• an opening/closing section positioned on an opening of the communication hole;
• a fastened section fastened to the plate;
• and
• a joining section for joining the opening/closing section to the fastened section, the joining section having two openings, the opening/closing section, the fastened section and the joining section being arranged in a direction in which a symmetric axis extends;
• wherein in a portion of the joining section which is closer to the opening/closing section, a pair of first outer peripheral portions of an outer periphery of each of the two openings which are closest to both ends of the joining section are symmetric with respect to the symmetric axis so as to form a substantially-V-shape or substantially-U-shape, in a direction from the opening/closing section toward the fastened section;
• and
• in a portion of the joining section which is closer to the fastened section, a pair of second outer peripheral portions of the outer periphery of each of the two openings which are closest to the both ends of the joining section are symmetric with respect to the symmetric axis so as to form a substantially-V-shape or substantially-U-shape, in a direction from the fastened section toward the opening/closing section,
• wherein a length of each of the two openings in a direction parallel to the symmetric axis is smaller than a length of the opening/closing section in a direction perpendicular to the symmetric axis,
• the pair of first outer peripheral portions are symmetric with respect to the symmetric axis so as to form a substantially-V-shape or substantially-U-shape such that a distance between the pair of first outer peripheral portions in the direction perpendicular to the symmetric axis gradually increases, and the pair of second outer peripheral portions are symmetric with respect to the symmetric axis so as to form the substantially-V-shape or substantially-U-shape such that a distance between the pair of second outer peripheral portions in the direction perpendicular to the symmetric axis gradually increases.