Patent ID: 8323001

Claim:
A hermetic compressor comprising: a block accommodating a compression element driven by a electromotive element within a hermetic vessel, the compression element forming a compression chamber; a piston reciprocating in the compression chamber; a valve plate arranged at an open end of the compression chamber, the valve plate including a suction hole formed therein; a suction valve opening and closing the suction hole; a suction muffler forming a sound absorbing space and provided with a communication pipe; a cylinder head pressing and fixing the valve plate to the block from an opposite side to the compression chamber; the communication pipe has a suction muffler outlet portion communicating with the suction hole, the suction muffler outlet portion is arranged to extend in a vertical direction to a center line passing through the suction hole, the suction muffler outlet portion including an edge that defines an outlet and that faces the compression chamber, and a part of the edge of the suction muffler outlet portion positioned at a downstream side of refrigerant gas that is flowing through the communication pipe overlaps a part of the suction hole in a state in which the suction muffler outlet portion is projected in a direction of the center line passing through the suction hole; a gasket is sandwiched between the valve plate and the suction muffler with the edge of the suction muffler portion abutting against the gasket, the gasket is provided with a communication hole which is opposed to both of the suction hole and the outlet of the suction muffler outlet portion and communicates with the suction hole and the suction muffler outlet portion, a center of the communication hole is located at an upstream side of the refrigerant gas flow path, a cross sectional area of the communication hole is larger than a cross sectional area of the suction hole, and an entire region of the communication hole is communicated with the suction muffler outlet portion; and wherein a maximum dimension in a radial direction of the suction hole overlapped by the part of the edge of the suction muffler outlet portion is in a range of being equal to or more than 5% and equal to or less than 20% of an inner diameter of the cylindrical portion of the suction hole, in a projection in the direction of the center line passing through the suction hole.