Refrigeration system having a rotary compressor

A rotary compressor comprising:

• an electric element, and first and second rotary compression elements driven by the electric element, these components being provided in a hermetically sealed container;
• gas compressed by the first rotary compression element being discharged into the hermetically sealed container, and the discharged gas of intermediate pressure being further compressed by the second rotary compression element;
• a cylinder constituting the second rotary compression element, and a roller engaged with an eccentric portion formed in a rotary shaft of the electric element, and eccentrically rotated in the cylinder;
• a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side;
• a spring member for always pressing the vane to the roller side;
• the cylinder forming a housing portion for the spring member, the housing portion being opened to a vane side and a hermetically sealed container side;
• a plug positioned in the housing portion from the hermetically sealed container side, and forming a gap between the plug and the hermetically sealed container;
• and
• an O ring attached around the plug to seal a part between the plug and the housing portion,
• wherein a space between the cylinder and the hermetically sealed container is set smaller than a distance from the O ring to an end of the plug on the hermetically sealed container side.

A rotary compressor comprising:

• an electric element, and a rotary compression element driven by the electric element, both components being provided in a hermetically sealed container;
• a cylinder constituting the rotary compression element, and a roller engaged with an eccentric portion formed in a rotary shaft of the electric element, and eccentrically rotated in the cylinder;
• a support member adapted to seal an opening surface of the cylinder, and provided with a bearing of the rotary shaft;
• a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side;
• a spring member for always pressing the vane to the roller side;
• the cylinder forming a housing portion for the spring member, the housing portion being opened to a vane side and a hermetically sealed container side;
• a plug positioned in the hermetically sealed container side of the spring member, and pressed into and fixed in the housing portion,
• wherein the support member of a part corresponding to the plug includes a roll off concaved in a direction away from the cylinder.

A rotary compressor comprising:

• an electric element, and first and second rotary compression elements driven by the electric element, these components being provided in a hermetically sealed container;
• gas compressed by the first compression element being discharged into the hermetically sealed container, and the discharged gas of intermediate pressure being further compressed by the second rotary compression element;
• a cylinder constituting the rotary compression element, and a roller engaged with an eccentric portion formed in a rotary shaft of the electric element, and eccentrically rotated in the cylinder;
• a vane abutted on the roller to divide an inside of the cylinder into a low pressure chamber side and a high pressure chamber side;
• a support member adapted to seal an opening surface of the cylinder, and provided with a bearing of the rotary shaft;
• a spring member for always pressing the vane to the roller side;
• the cylinder forming a housing portion for the spring member, the housing portion being opened to a vane side and a hermetically sealed container side;
• a plug positioned in the hermetically sealed container side of the spring member, and pressed into and fixed in the housing portion,
• wherein the support member of a part corresponding to the plug includes a roll off concaved in a direction away from the cylinder.

A rotary compressor comprising:

• an electric element, and first and second rotary compression elements driven by the electric element, these components being provided in a hermetically sealed container, gas compressed by the first rotary compression element being discharged into the hermetically sealed container, and the discharged gas of intermediate pressure being further compressed by the second rotary compression element;
• cylinders constituting the respective rotary compression elements;
• an intermediate diaphragm provided between the cylinders to partition each rotary compression element;
• a support member adapted to seal an opening surface of each cylinder, and provided with a bearing of a rotary shaft;
• and
• an oil hole formed in the rotary shaft,
• wherein the intermediate diaphragm includes an oil supply path for communicating the oil hole with a suction side of the second rotary compression element,
• wherein the oil supply path is constructed by boring a through-hole in the intermediate diaphragm to communicate an outer peripheral surface with an inner peripheral surface of the rotary shaft side, and a communication hole for sealing an opening of the through-hole on the outer peripheral side, and communicating the through-hole with the suction side is bored on the cylinder for constituting the second rotary compression element.

A rotary compressor comprising:

• an electric element, and first and second rotary compression elements driven by the electric element, these components being provided in a hermetically sealed container, and gas compressed by the first rotary compression element being compressed by the second rotary compression element;
• first and second cylinders constituting the first and second rotary compression elements;
• and
• first and second rollers engaged with eccentric portions formed in a rotary shaft of the electric element to have a phase difference of 180°, and eccentrically rotated in the respective cylinders,
• wherein a section of a connecting portion for connecting both eccentric portions with each other is formed in a shape having a thickness larger in a direction orthogonal to an eccentric direction than that in the eccentric direction of each of the eccentric portions, a side face of the connecting portion in the eccentric direction side of the first eccentric portion is formed in a circular-arc shape of the same center as that of the second eccentric portion, and a side face in the eccentric direction of the second eccentric portion is formed in a circular-arc shape of the same center as that of the first eccentric portion.