Abstract:
An oil supply groove in communication with a pump room is formed above a bearing of a housing, and an open air groove in communication with atmospheric air is formed at a position rotated around the bearing by 90° from the oil supply groove. In a shank of a rotor, a branch passage branching from an oil passage formed in its axial direction to the diametrical direction of the shank and an open air passage formed in the direction perpendicular to the branch passage are formed. The branch passage and the oil supply groove communicate with each other while the open air passage and the open air groove are arranged to also communicate with each other.
Abstract:
A screw compressor includes a casing, a screw rotor disposed in a cylinder portion of the casing to define a compression chamber, and a capacity control slide valve. Fluid sucked into the compression chamber is compressed by rotation of the screw rotor. The slide valve is slidable along a rotation axis of the screw rotor and is opposed to an outer circumferential surface of the screw rotor. The slide valve includes a dynamic pressure generator formed on an opposed surface of the slide valve that is opposed to the screw rotor to generate a dynamic pressure using fluid in contact with the opposed surface of the slide valve. The slide valve is configured so that the dynamic pressure generated by the dynamic pressure generator avoids contact between the slide valve and the screw rotor.
Abstract:
The present invention provides a control method and a control apparatus of an inverter compressor in which when a trip occurs immediately after the inverter is started, retry can be performed in a short period of time with restart being performed in accordance with the detected conditions after the retry waiting times which are different from each other elapse. There are provided two or more kinds of retry waiting times, and the retry waiting time immediately after starting is made shorter than the others.
Abstract:
Embodiments of rotary vane engines include rotors that rotate about an axis of rotation. The rotors can be moved in directions substantially perpendicular to the axis of rotation to vary expansion and/or compression ratios of the rotary vane engines. The ability to vary the expansion and/or compression ratios can facilitate optimization of the performance of the rotary vane engines as operating conditions vary.
Abstract:
A scroll compressor is provided with an oil return tube having an outlet for directing oil toward a motor protector for an electric motor. The oil supply tube is positioned to be at an angle relative to the drive axis of a shaft driven by the electric motor. This ensures that the outlet of the oil supply tube can be properly positioned relative to the electric motor. Under normal conditions, an adequate flow of refrigerant will pull the oil from the oil supply tube and away from the motor protector. However, should there be an inadequate flow of refrigerant within the sealed compressor, the oil will contact the motor protector, which in turn may stop operation of the electric motor.
Abstract:
A compressor arrangement includes a compressor housing, an intake region defined in the compressor housing, a control pressure connection in communication with the intake region, a control pressure chamber in communication with the control pressure connection, a control piston disposed in the compressor housing beneath the control pressure chamber, a guide element securing the control piston in the compressor housing, at least one sealing element disposed between the control piston and the guide element, and a feed pressure connection defined in the compressor housing to supply compressed air beneath the control piston. In a closed position, the control piston closes the feed pressure connection when in the closed position. In an opened position, the control piston opens the feed pressure connection when in the opened position, thereby permitting air to vent from the feed pressure connection via a venting connection.
Abstract:
Provided is a highly reliable compressor safety valve capable of maintaining valve function over a long period of time by reliably preventing the intrusion of foreign matter into a discharge port. A compressor safety valve (30) which releasing an abnormal pressure to the outside through a discharge port (32) when the pressure in a compressor (1) has increased abnormally, comprising a cap (35) having an anchoring part (35B) integrally formed therewith by bending and that is mounted on a head portion (34) of a valve main body (31) in an attachable and detachable manner through the anchoring part (35B) and an elastic body (36) being interposingly mounted between the cap (35) and the head portion (34) of the valve main body (31) in a compressed state and that is in close contact with the head portion (34) of the valve main body (31); the elastic body (36) is interposed so as to cover the entirety of a peripheral surface of the discharge port (32) and the cap (35) is anchored to the head portion (34) of the valve main body (31) by the elastic repulsive force of the elastic body (36), and the discharge port (32) is closed by the elastic body (36) and the cap (35).
Abstract:
A system is provided and may include logic circuitry in communication with an intelligent device. The logic circuitry may process a refrigeration system operating parameter as a function of time and at least one of the logic circuitry and the intelligent device may diagnose a refrigeration system status based on the processing. The intelligent device may output the diagnosis.
Abstract:
Disclosed is a variable capacity type rotary compressor (1), a cooling apparatus having the same, and an operation method thereof, wherein in the variable capacity type rotary compressor (1) and the cooling apparatus having the same, a discharge pressure to be supplied to a rear side of a second vane (430) disposed in the compressor (1) is supplied after being higher than a reference pressure, so that the compressor (1) can be switched from a saving mode into a power mode, whereby the second vane (430) can be press-contacted with a second rolling piston (420) with fast and accurately moving without vibration, resulting in preventing beforehand noise occurrence or efficiency degradation due to the vibration of the second vane (430) when the compressor (1) or the cooling apparatus having the compressor (1) is operated in the power mode.
Abstract:
A compressor capacity control method and a device is provided. The changeover from a loading state regarding the compressor to an unloading state regarding the compressor and vice versa is controlled, whereby, during a time span from a starting time point when the compressor operation state changes into an unloading state to a time point when a loading/unloading operation-cycle is finished and a predetermined time duration has passed after the starting time point, the time cycle control is performed so that the loading state is changed into the unloading state, at a time point when the predetermined time duration has passed. Further, the discharge pressure of the fluid discharged from the compressor is detected so that the loading state is changed into the unloading state in a case where the discharge pressure exceeds a prescribed upper limit pressure.