Abstract: An object is to provide a highly efficient compressor while improving a refrigerant leakage, enhancing a performance of a compressor, improving durability, and enhancing reliability.

Abstract: An object is to provide a highly efficient compressor while improving a refrigerant leakage, enhancing a performance of a compressor, improving durability, and enhancing reliability.

Abstract: In fixing structure and method for fixing an upper cup muffler (7) to an upper bearing portion (6) for sealing the opening of an upper cylinder (3) in a hermetically sealed compressor, the upper bearing portion (6) includes a step portion having an upper surface, a lower surface (6C) and a side surface (6B) between the upper and lower surfaces, the peripheral edge portion between the upper and side surfaces of the upper bearing portion is declined outwardly to have a slant surface (6A), and the upper cup muffler (7) includes a bottom surface (7C) and a peripheral side surface lower portion (7D) that extends downwardly from the edge portion of the bottom surface (7c) of the upper cup muffler (7).

Abstract: In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil (8) being stocked in the hermetically sealed container (1), the oil (8) in the hermetically sealed container (1) is injected into the compression chamber (43) when refrigerant is sucked into the compression chamber (43) of the cylinder.

Abstract: An object is to provide a highly efficient compressor while improving a refrigerant leakage, enhancing a performance of a compressor, improving durability, and enhancing reliability.

Abstract: A refrigerant compressor has a member forming a compression chamber with a discharge port and a discharge reed valve. The reed valve has a valve cover portion at one end for opening and closing the discharge port and a portion at another end that is fixed to the member. A valve restricting plate is fixed to the member forming the compression chamber together with the fixed portion of the discharge valve so as to overlie the reed valve and to restrict the opening amount of the reed valve cover portion. The valve restricting plate has a head portion wider than a middle portion thereof which head portion opposes the valve cover portion of the discharge valve against which it can come into contact A through hole or notch is provided in the restricting plate head portion to provide back pressure flow communication that acts on the cover portion of the reed valve to prevent it from sticking to the valve restricting plate.

Abstract: An object of the invention is to provide a refrigerant compressor which can improve a response of a discharge valve while intending to maintain a strength and a workability of a valve restricting plate and an accuracy of finished shape without increasing a thickness.