Abstract: A rotary compressor includes a compressing section including a cylindrical cylinder, two end plates closing both ends of the cylinder, respectively, and a piston held by an eccentric section of a rotary shaft driven to rotate by a motor. A working chamber is formed between the piston and the cylinder inner wall. The rotary compressor also includes a vane protruding from within a vane groove of the cylinder into the working chamber; an airtight compressor housing accommodating therein the compressing section; a suction hole provided in the cylinder and communicating the suction chamber with a low-pressure side of a refrigerating cycle; and a discharge hole provided in one of the end plates and communicating the compression chamber with a high-pressure side of the refrigerating cycle. An auxiliary discharge hole different from the discharge hole is provided in the one end plate.

Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing in which first, second, third communication holes are provided apart in an axial direction on an outer peripheral wall; an accumulator held at an outside part of the housing; a low-pressure connecting pipe for connecting a bottom communication hole of the accumulator and the second communication hole; and an intermediate connecting pipe for connecting the first and third communication holes. The first and third communication holes are provided nearly in the same locations in the circumferential direction of the housing. The accumulator is held nearly in the same location in the circumferential direction as that of the second communication hole. The second communication hole is provided in a different location in the circumferential direction from those of the first and third communication holes for preventing interference between the low-pressure and intermediate connecting pipes each formed in arc shape.

Abstract: A two-stage compression rotary compressor is provided that includes a low-stage compressing section and a high-stage compressing section housed within a cylindrical sealed housing oriented vertically, a low-stage suction pipe that is connected to a suction side of the low-stage compressing section and sucks in a low-pressure refrigerant, a low-stage discharge pipe the is connected to a discharge side of the low-stage compressing section and discharges the refrigerant from the low-stage to outside of the sealed housing, a high-stage suction pipe that is connected to a suction side of the high-stage compressing section and sucks in the refrigerant discharged from the low-stage, a low-pressure connecting pipe that connects the low-stage suction pipe and an accumulator, and guides the refrigerant inside the accumulator to a suction side of a low-stage compressing section, and an intermediate connecting pipe that connects the low-stage discharge pipe and the high-stage suction pipe, wherein an inner diameter of th

Abstract: A two-stage rotary compressor includes a sealed cylindrical compressor housing that includes first, second and third communication holes separately arranged sequentially in an axial direction on an outer peripheral wall, an accumulator held on an outer side of the housing, a low-pressure connecting pipe that connects a bottom communication hole of the accumulator and the second communication hole, and an intermediate connecting pipe that connects the first and third communication holes. The second and third communication holes are arranged at nearly the same circumferential direction position of the housing. The accumulator is held at nearly the same circumferential direction position as the second communication hole.

Abstract: In a two-cylinder rotary compressor, two compressing sections accommodated in a compressor body and an accumulator are connected to each other by two suction pipes each formed with an L-shaped bend part in the intermediate pipe part thereof To reduce a pressure loss caused by the flow resistance of a refrigerant sucked from the accumulator into the compressor, the L-shaped bend parts of the two suction pipes are arranged on different imaginary planes including the center axis line of the compressor body.

Abstract: There is provided a rotary compressor in which the pressure loss in a refrigerant suction pipe connecting the compressor and an accumulator to each other is reduced, and the compression efficiency is increased. The inside diameter D2 of a refrigerant suction pipe 64 on the outlet side of the accumulator 6 is made larger than the inside diameter D1 of a refrigerant return pipe 62 on the inlet side thereof (D2>D1).

Abstract: In an injectable two-staged rotary compressor, a second suction pipe includes a heat-exchange promoting unit that promotes heat exchange between intermediary-pressure injected refrigerant and internal space or an external surface of a sealed container. The heat being exchanged by the intermediary-pressure injected refrigerant absorbing heat.

Abstract: There is provided a two-stage compression rotary compressor in which the balancer mass of a rotor can be made as small as possible, and the moments that tilt the whole of a shaft can be balanced. The axial length L2 of a high-stage side crankshaft 72 corresponding to a high-stage compressing section 32 is longer than the axial length L1 of a low-stage side crankshaft 73 corresponding to a low-stage compressing section 31 (L2>L1).

Abstract: In the case where a radial fan is provided on the upper end side of a rotor to provide an air circulating flow containing refrigerant gas so as not to hinder the flow of lubricating oil in a motor chamber, by which a motor is cooled, in order to reduce the cost of the radial fan, the radial fan is constructed by combining a plurality of blades (fan blades) (242) formed radially in the range of approximately 180° opposed to an upper balancer (270) so as to have a height smaller than the height of the upper balancer (270), and a fan cap (260) including a fan cover portion (262) covering the top faces of the blades (242) and an engagement portion (263) fixed to the upper end side of the rotor.

Abstract: A problem to be solved by the present invention is that the temperature of a refrigerant discharged from a compression section can be detected more exactly without being influenced by variable factors existing around the compression section. In a rotary compressor 1 having a motor 6 and a compression section 3 provided in a closed container 2, and also having a discharge pipe 26 provided in an upper part of the closed container 2 to discharge a refrigerant compressed by the compression section 3 to the outside of the closed container 2, a refrigerant discharge part 462 for discharging the refrigerant compressed by the compression section 3 toward the inner peripheral surface of the closed container 2 is provided, and a discharge temperature sensor 20 for detecting the discharge temperature of compressed refrigerant is arranged in a portion opposed to the refrigerant discharge part 462 on the outer peripheral surface side of the closed container 2.

Abstract: There is provided, at a low cost, a small-size and lightweight scroll compressor capable of preventing a decrease in compression efficiency by utilizing a medium pressure between a suction pressure and a discharge pressure as a back pressure. An independent minute gap in the axial direction is provided between a main frame 3 and a thrust ring 8. This minute gap is used as a second back pressure chamber C2, and the medium pressure between the suction pressure and the discharge pressure is introduced into the second back pressure chamber C2.

Abstract: There is provided, at a low cost, a small-size and lightweight scroll compressor capable of preventing a decrease in compression efficiency by utilizing a medium pressure between a suction pressure and a discharge pressure as a back pressure. An independent minute gap in the axial direction is provided between a main frame 3 and a thrust ring 8. This minute gap is used as a second back pressure chamber C2, and the medium pressure between the suction pressure and the discharge pressure is introduced into the second back pressure chamber C2.

Abstract: A scroll compressor supplies an optimum quantity of lubricating oil to a refrigerant compressing section and restrains a decrease in compression efficiency caused by gas leakage. An oil supply passage (35) whose discharge port is open to a joint surface of a main frame (3) and a fixed scroll (4) is provided, and a throttle pin (353) is inserted in the oil supply passage (35) with a predetermined clearance to regulate the inflow quantity of lubricating oil (0). Also, a groove-shaped connecting portion is formed in the joint surface on the main frame side to connect the discharge port to a compression chamber (43).

Abstract: It provides at a low price a compressor capable of preventing a waste oil pipe from falling off and curbing leakage of lubricating oil and oscillation of the pipe. An L-shaped waste oil pipe 8 for returning lubricating oil 20 to a bottom of a motor chamber 22 is connected to a waste oil passage 33 of a main frame 3 so as to put at least a part of the waste oil pipe 8 in elastic contact with an internal surface of an airtight container 2.

Abstract: To provide a scroll compressor that has a lower sliding friction loss and high compression efficiency, taking the diameter of a main shaft (61) as Dm and the diameter of a crank shaft (62) as Dc, the crank shaft (62) formed at one end of the main shaft (61) is arranged so that the eccentricity e thereof with respect to the main shaft (61) has a relation of e>(Dm?Dc)/2. Further, to support a main bearing (31) of a main frame (3) by the main shaft (61) serving as a sliding bearing and to support a crank bearing (421) of an orbiting scroll (42) by the crank shaft (62) serving as a sliding bearing, a joint shaft (65) for connecting the main shaft (61) and the crank shaft (62) to each other is formed so as to have a shape that falls within the main shaft diameter and within the crank shaft diameter when viewed in the axial direction.

Abstract: There is provided a scroll compressor which can surely supply an optimum quantity of lubricating oil to a refrigerant compressing section and restrain a decrease in compression efficiency caused by gas leakage. An oil supply passage 35 whose discharge port is open to a joint surface of a main frame 3 and a fixed scroll 4 is provided, and a throttle pin 353 is inserted in the oil supply passage 35 with a predetermined clearance to regulate the inflow quantity of lubricating oil O. Also, a groove-shaped connecting portion is formed in the joint surface on the main frame side to connect the discharge port to a compression chamber 43.

Abstract: In the case where a radial fan is provided on the upper end side of a rotor to produce an air circulating flow containing refrigerant gas so as not to hinder the flow of lubricating oil in a motor chamber, by which a motor is cooled, in order to reduce the cost of the radial fan, the radial fan is constructed by combining a plurality of blades (fan blades) 242 formed radially in the range of approximately 180° opposed to an upper balancer 270 so as to have a height smaller than the height of the upper balancer 270, and a fan cap 260 including a fan cover portion 262 covering the top faces of the blades 242 and an engagement portion 263 fixed to the upper end side of the rotor.

Abstract: To provide a scroll compressor that has a lower sliding friction loss and high compression efficiency, taking the diameter of a main shaft 61 as Dm and the diameter of a crank shaft 62 as Dc, the crank shaft 62 formed at one end of the main shaft 61 is arranged so that the eccentricity e thereof with respect to the main shaft 61 has a relation of e>(Dm−Dc)/2. Further, to support a main bearing 31 of a main frame 3 by the main shaft 61 serving as a sliding bearing and to support a crank bearing 421 of an orbiting scroll 42 by the crank shaft 62 serving as a sliding bearing, a joint shaft 65 for connecting the main shaft 61 and the crank shaft 62 to each other is formed so as to have a shape that falls within the main shaft diameter and within the crank shaft diameter when viewed in the axial direction.

Abstract: In order to give appropriate back pressure to an orbiting-scroll during any operation, on one end side of a cylindrical thrust ring, there is provided a flange portion, and a movable range of the orbiting-scroll in an axial direction with respect to a regulation surface of a main frame is indirectly regulated through this flange portion, on the flange portion, there is provided a groove, and the groove is caused to communicate to a first back-pressure chamber at a low-pressure side.

Abstract: In order to give appropriate back pressure to an orbiting-scroll during any operation, on one end side of a cylindrical thrust ring, there is provided a flange portion, and a movable range of the orbiting-scroll in an axial direction with respect to a regulation surface of a main frame is indirectly regulated through this flange portion, on the flange portion, there is provided a groove, and the groove is caused to communicate to a first back-pressure chamber at a low-pressure side.