Abstract: A scroll compressor includes: a shell forming an outer case, a fixed scroll and an orbiting scroll stored in the shell, a frame holding the orbiting scroll, a thrust plate between the orbiting scroll and the frame, and a thrust oil return pipe fixed to the frame. The shell forms an oil reservoir in which lubricating oil is reserved. The orbiting scroll and fixed scroll form a compression chamber. Lubricating oil flows through the thrust oil return pipe to return to the oil reservoir. A hole portion on the thrust plate passes from a first surface portion that slidably contacts the orbiting scroll to a second surface portion facing the frame. The thrust oil return pipe is inserted into the hole portion and fits in the thrust plate.

Abstract: A device management system having a device having a structural component and a terminal connected to the device via a network includes a feature value detection unit provided in the device and for detecting a feature value of the structural component, a storage device storing in time series the feature value detected by the feature value detection unit, a lifespan estimation unit for estimating a lifespan of the structural component from the feature value stored in the storage device, a determination unit for determining whether a remaining period that is a time period from a time at which estimation is performed to an end of the lifespan is less than or equal to a set scheduled period, and a notification unit provided in the terminal and for sending a notification indicating that the remaining period is less than or equal to the set scheduled period.

Abstract: A compressor includes a compression mechanism that compresses refrigerant; a main shaft that transmits a rotational driving force to the compression mechanism; a balance weight provided below the compression mechanism and integrated with the main shaft, the balance weight having a cylindrical outer peripheral surface centered at the main shaft; and an oil sump portion provided below the balance weight and stores lubricating oil to be supplied to the compression mechanism. The balance weight has an annular oil-receiving recessed portion in an upper surface, the oil-receiving recessed portion being centered at the main shaft and integrated with the balance weight. The balance weight has a hollow portion in a lower surface, the hollow portion extending in part of the lower surface in a peripheral direction around the main shaft and being integrated with the balance weight. The oil-receiving recessed portion communicates with at least part of the hollow portion.

Abstract: A scroll compressor includes: a shell forming an outer case, the shell forming an oil reservoir in which lubricating oil is reserved; a fixed scroll stored in the shell; an orbiting scroll stored in the shell, the orbiting scroll forming a compression chamber together with the fixed scroll; a frame holding the orbiting scroll; a thrust plate disposed between the orbiting scroll and the frame; and a thrust oil return pipe fixed to the frame, the thrust oil return pipe being a pipe through which the lubricating oil flows to return to the oil reservoir, in which: a hole portion is formed on the thrust plate, the hole portion passing from a first surface portion to a second surface portion, the first surface portion slidably contacting with the orbiting scroll, the second surface portion facing the frame; and the thrust oil return pipe is inserted into the hole portion and is fit in the thrust plate, and an upper end portion of the thrust oil return pipe does not protrude from the first surface portion of the thr

Abstract: A scroll compressor includes an orbiting scroll, a fixed scroll, and a shell. The fixed scroll is configured to form a compression chamber together with the orbiting scroll. The shell accommodates the orbiting scroll and the fixed scroll. The fixed scroll includes a base plate and a scroll body. The base plate is fixed to the shell. The scroll body projects from the base plate toward the orbiting scroll. The base plate has a stress absorber that is formed outside the scroll body in a radial direction and that is configured to absorb stress from an outer region in the radial direction. A weld joint is formed in an overlap region where the shell and the base plate are fixed to each other and overlap each other. The stress absorber is provided on a line that passes through a center of the base plate and the weld joint.

Abstract: A scroll compressor includes a frame holding an orbiting scroll configured to slide, a fixed scroll configured to form a compression chamber together with the orbiting scroll, and a shell accommodating the frame and the fixed scroll. The shell includes a first inner wall surface and a first protrusion protruding from the first inner wall surface to position the fixed scroll, and the fixed scroll is fixed to the first inner wall surface.

Abstract: A device management system having a device having a structural component and a terminal connected to the device via a network includes a feature value detection unit provided in the device and for detecting a feature value of the structural component, a storage device storing in time series the feature value detected by the feature value detection unit, a lifespan estimation unit for estimating a lifespan of the structural component from the feature value stored in the storage device, a determination unit for determining whether a remaining period that is a time period from a time at which estimation is performed to an end of the lifespan is less than or equal to a set scheduled period, and a notification unit provided in the terminal and for sending a notification indicating that the remaining period is less than or equal to the set scheduled period.

Abstract: A scroll compressor includes a crank shaft 6, an orbiting scroll 32, and a second plug part 329. The crank shaft 6 has a lubricant channel 63 which allows lubricant 9 to flow therethrough. The orbiting scroll 32 is attached to the crank shaft 6 and has a second inner channel 327 that allows the lubricant supplied thereto through the crank shaft 6 to outwardly flow therethrough. The second plug part 329 serving as an adjustment part is provided in the second inner channel 327 of the orbiting scroll 32 and adjusts a flow amount of the lubricant 9 flowing through the second inner channel 327.

Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll, which are made of materials having different strengths and which include respective scroll laps. The scroll lap of the fixed scroll and the orbiting scroll having a lower material strength has a thickness satisfying tl=2a?, where tl represents scroll lap thickness, a represents basic circle radius, and ? represents phase angle. The scroll lap of the fixed scroll and the orbiting scroll having a higher material strength has a thickness satisfying th=2a?, where th represents scroll lap thickness, a represents basic circle radius, and ? represents phase angle. The scroll lap thickness th of the fixed scroll and the orbiting scroll having the higher material strength is set to be less than the scroll lap thickness tl of the fixed scroll and the orbiting scroll having the lower material strength.

Abstract: A scroll compressor includes an orbiting scroll, a fixed scroll, and a shell. The fixed scroll is configured to form a compression chamber together with the orbiting scroll. The shell accommodates the orbiting scroll and the fixed scroll. The fixed scroll includes a base plate and a scroll body. The base plate is fixed to the shell. The scroll body projects from the base plate toward the orbiting scroll. The base plate has a stress absorber that is formed outside the scroll body in a radial direction and that is configured to absorb stress from an outer region in the radial direction. A weld joint is formed in an overlap region where the shell and the base plate are fixed to each other and overlap each other. The stress absorber is provided on a line that passes through a center of the base plate and the weld joint.

Abstract: A scroll compressor includes a frame holding an orbiting scroll configured to slide, a fixed scroll configured to form a compression chamber together with the orbiting scroll, and a shell accommodating the frame and the fixed scroll. The shell includes a first inner wall surface and a first protrusion protruding from the first inner wall surface to position the fixed scroll, and the fixed scroll is fixed to the first inner wall surface.

Abstract: A compressor includes a compression mechanism that compresses refrigerant; a main shaft that transmits a rotational driving force to the compression mechanism; a balance weight provided below the compression mechanism and integrated with the main shaft, the balance weight having a cylindrical outer peripheral surface centered at the main shaft; and an oil sump portion provided below the balance weight and stores lubricating oil to be supplied to the compression mechanism. The balance weight has an annular oil-receiving recessed portion in an upper surface, the oil-receiving recessed portion being centered at the main shaft and integrated with the balance weight. The balance weight has a hollow portion in a lower surface, the hollow portion extending in part of the lower surface in a peripheral direction around the main shaft and being integrated with the balance weight. The oil-receiving recessed portion communicates with at least part of the hollow portion.

Abstract: A controller, at least during the heating operation, controls the opening degree of a second expansion device and/or a third expansion device based on a discharge refrigerant temperature detected by a discharge refrigerant temperature detector, or a value computed using the discharge refrigerant temperature, and causes refrigerant having a quality equal to or greater than 0.9 and less than or equal to 0.99 to be suctioned into a compressor.

Abstract: A fluid compressor includes a closed container having an inlet, a compression mechanism including a compression chamber in which fluid flowing into the closed container through the inlet is compressed, a discharge port through which the fluid compressed in the compression chamber is allowed to flow, a discharge valve opening and closing the discharge port, and a valve retainer limiting an amount of lift of the discharge valve. The discharge valve includes a curved portion whose shape is defined by one or more curvatures. When the discharge port is closed by the discharge valve, the valve retainer and the discharge valve are spaced apart from each other.

Abstract: A scroll compressor includes a crank shaft 6, an orbiting scroll 32, and a second plug part 329. The crank shaft 6 has a lubricant channel 63 which allows lubricant 9 to flow therethrough. The orbiting scroll 32 is attached to the crank shaft 6 and has a second inner channel 327 that allows the lubricant supplied thereto through the crank shaft 6 to outwardly flow therethrough. The second plug part 329 serving as an adjustment part is provided in the second inner channel 327 of the orbiting scroll 32 and adjusts a flow amount of the lubricant 9 flowing through the second inner channel 327.

Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll, which are made of materials having different strengths and which include respective scroll laps. The scroll lap of the fixed scroll and the orbiting scroll having a lower material strength has a thickness satisfying tl=2a?, where tl represents scroll lap thickness, a represents basic circle radius, and ? represents phase angle. The scroll lap of the fixed scroll and the orbiting scroll having a higher material strength has a thickness satisfying th=2a?, where th represents scroll lap thickness, a represents basic circle radius, and ? represents phase angle. The scroll lap thickness th of the fixed scroll and the orbiting scroll having the higher material strength is set to be less than the scroll lap thickness tl of the fixed scroll and the orbiting scroll having the lower material strength.

Abstract: A scroll compressor to compress fluid in a compression chamber formed by combining a scroll wrap of a fixed scroll and a scroll wrap of an orbiting scroll, the scroll wrap of the fixed scroll and the scroll wrap of the orbiting scroll each having a scroll inner end part having a bulb shape defined by an outer surface involute curve, an inner surface involute curve, and a plurality of arcs connecting an end of the outer surface involute curve and an end of the inner surface involute curve, at least one of the scroll inner end parts being formed in an n-tier stair-like shape in which n (n?3) number of bulb shapes are stacked on top of one another in an upright direction of the scroll wrap, the scroll compressor being configured to satisfy ?os (0)>?os (1)>?os (2)> . . . >?os (n?1) where involute roll angles of the outer surface involute curve in tiers of the stair-like shape of the scroll inner end part are ?os (0), ?os (1), ?os (2), . . .

Abstract: A scroll compressor includes a stationary scroll; an orbiting scroll having a pair of first Oldham keyways on one surface thereof, the orbiting scroll defining a compression chamber in combination with the stationary scroll; a frame having a pair of second Oldham keyways and supporting the orbiting scroll; and an Oldham ring for inhibiting rotation of the orbiting scroll, the Oldham ring having a pair of first Oldham keys on one surface thereof and a pair of second Oldham keys on the other surface thereof, the first Oldham keys slidably engaging with the respective first Oldham keyways, the second Oldham keys slidably engaging with the respective second Oldham keyways.

Abstract: A fluid compressor includes a closed container having an inlet, a compression mechanism including a compression chamber in which fluid flowing into the closed container through the inlet is compressed, a discharge port through which the fluid compressed in the compression chamber is allowed to flow, a discharge valve opening and closing the discharge port, and a valve retainer limiting an amount of lift of the discharge valve. The discharge valve includes a curved portion whose shape is defined by one or more curvatures. When the discharge port is closed by the discharge valve, the valve retainer and the discharge valve are spaced apart from each other.

Abstract: A scroll compressor includes a stationary scroll; an orbiting scroll having a pair of first Oldham keyways on one surface thereof, the orbiting scroll defining a compression chamber in combination with the stationary scroll; a frame having a pair of second Oldham keyways and supporting the orbiting scroll; and an Oldham ring for inhibiting rotation of the orbiting scroll, the Oldham ring having a pair of first Oldham keys on one surface thereof and a pair of second Oldham keys on the other surface thereof, the first Oldham keys slidably engaging with the respective first Oldham keyways, the second Oldham keys slidably engaging with the respective second Oldham keyways.