摘要:
To resolve a problem of decreasing a heat exchange rate of a refrigerating cycle owing to a large amount of a refrigerator oil delivered from a discharge pipe to the refrigerating cycle, there is provided a sealed compressor driven by a motor having a compressor unit and a motor unit in which a ring is provided at an outer periphery of a coil end of a stator on a side of the compressor unit to reduce the amount of delivering the refrigerator oil to the refrigerating cycle and a shape of a balance weight of a rotor on the side of the compressor unit is formed in a cylindrical shape a portion of a side face of which is opened and an end face of which is flat to thereby reduce stirring of fluid.
摘要:
A closed-type electrically-driven compressor comprising a compressing mechanism portion and an electric motor portion driving the compressing mechanism portion within a closed container, which is formed to be substantially cylindrical, and a terminal fitted into a hole formed in a cover body of the closed container and welded to the cover body, and wherein a mount portion and vicinities of the terminal on the cover body of the closed container are formed into a convex-shaped portion which is protuberant from a peripheral flat portion of the cover body.
摘要:
A method for adjusting current clock counts in a distributed database apparatus is accomplished. Each processor assigns a timestamp to a transaction according to its clock when the transaction is generated, and transaction are executed by accessing the database according to timestamp order. A processor in at least a first one of the computer sites accesses an abort count corresponding to a second computer site; compares an abort count corresponding to the first computer site with the abort count corresponding to the second computer site; and changes the current clock count corresponding to the first computer site to more closely match the current clock count corresponding to the second computer site, at times when the comparison between the abort counts in the first and second computer sites indicates that new transactions have been aborted more frequently in one of the two computer sites.
摘要:
A rotary compressor has a compression mechanism including main and sub bearings closing the ends of a cylinder bore and supporting a crankshaft having an eccentric portion on which a rolling piston positioned in the cylinder bore is rotatably mounted. Oil grooves are formed in the shaft holes of the bearings to receive lubrication oil from spaces defined by the rolling piston, the crankshaft eccentric portion and the main and sub bearings. The eccentric portion and the sub bearing are sized and shaped such that the oil groove in the sub bearing is always prevented from opening to the space adjacent thereto. The drawing force generated in the oil groove in the sub bearing by the rotation of a balancer attached to the lower end of the crankshaft is thereby prevented from acting on the space, thereby avoiding cavitation abrasion of the members facing the spaces.
摘要:
A displacement type fluid machine has a first lubricating fluid pump, provided at the rotating shaft and immersed in the lubricating fluid stored in the lubricating fluid-storing chamber, for feeding lubricating fluid to a first one of the two sliding portions via a lubricating fluid-guiding path formed at the rotating shaft; a second lubricating fluid pump, provided at the rotating shaft, for raising the pressure of lubricating fluid which has been fed via the lubricating fluid-guiding path by a predetermined pump head, and for feeding that lubricating fluid to a second one of the two sliding portions; and a third lubricating fluid pump, which is provided at or near the rotating shaft, for raising the pressure of lubricating fluid which has been fed via the lubricating fluid-guiding path by a predetermined pump head, and for feeding that lubricating fluid to a third one of the two sliding portions.
摘要:
In a scroll compressor, generation of excessive vibration attributable to a ferrous Oldham's ring is eliminated, the fatigue failure and the operation noise are prevented, and the reliability is improved. Only an Oldham's key under sliding motion is formed of a metallic bush formed of iron excellent in the reliability in slidability, and an annular part large in volume is manufactured of light metal such as aluminum, and assembled to reduce the weight. That is, the bush excellent in wear resistance is press-fitted and locked to a light Oldham's ring formed of aluminum alloy in which a projection is integrated with the annular part. Alternatively, both sides of the projection which are the sliding sides with key grooves may be formed in arc shape. In this construction, the scroll compressor is obtained, in which generation of the excessive vibration attributable to a conventional ferrous Oldham's ring is eliminated thereby, the fatigue failure and the operation noise attributable to the vibration are prevented, the reliability is high, and the fabricability is excellent.
摘要:
An indicator comprises first means adapted for emitting a ray of light; and second means having an indicating surface for receiving the ray of light to permit the ray of light to illuminate the indicating surface. The first and second means are movable relative to each other to vary intensity of illumination of the indicating surface.
摘要:
There is provided a scroll compressor having high overall adiabatic efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to a backside of scroll members to produce an attractive force to attract both scroll members. A control bypass is also provided for communicating compression chambers with a discharge system only when pressure in the compression chambers is high.
摘要:
There is provided a scroll compressor having high overall efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to a backside of scroll members to produce an attractive force to attract both scroll members. A control bypass is also provided for communicating compression chambers with a discharge system only when pressure in the compression chambers is high.
摘要:
A heat pump apparatus comprising: a scroll compressor including an orbiting scroll member in which a spiral wrap is formed on a first base plate, and an non-orbiting scroll member in which a spiral wrap is formed on a second base plate and a back pressure chamber for introducing pressure into a side of the orbiting scroll member or the non-orbiting scroll member opposite to a compression chamber formed by the orbiting and non-orbiting scroll members; a heat-exchanger; an expansion device; device for detecting a consumption power of the heat pump apparatus or the compressor; and device for changing the pressure in the back pressure chamber in accordance with an output from the detecting device.