Abstract: A scroll compressor that has reduced leakage loss and high efficiency includes an orbiting scroll that has spiral teeth on two surfaces, and a fixed scrolls that face the surfaces of the orbiting scroll and that have spiral teeth that intermesh with the spiral of the orbiting scroll. Tip seals are mounted only to a spiral tooth of one of the fixed scrolls that intermeshes with a spiral tooth of the orbiting scroll and a spiral tooth of the orbiting scroll.

Abstract: A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll.

Abstract: A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll.

Abstract: A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll.

Abstract: A refrigeration air conditioner includes a first equalizer pipe connecting a bottom portion of a first hermetic vessel, which contains a main compression mechanism and lubricating oil, to a bottom portion of a second hermetic vessel, which contains an expansion mechanism, a sub-compression mechanism, and lubricating oil. A second equalizer pipe connects a side of the second hermetic vessel at a position higher than a minimum oil level to a suction side of the main compression mechanism. The space within the second hermetic vessel is isolated from the expansion mechanism and the sub-compression mechanism, and the pressure within the second hermetic vessel is not dependent upon the pressure within the expansion mechanism and the pressure within the sub-compression mechanism.

Abstract: A scroll expander that is efficient in a wide range of operating conditions by suppressing leakage loss and decreasing in recovered power using a simple construction includes: an expansion mechanism, including an orbiting scroll and a first fixed scroll, recovers power by expanding a refrigerant; and an auxiliary compression mechanism, including an orbiting scroll and a second fixed scroll, compresses a refrigerant using power recovered by the expansion mechanism. A tip seal is mounted only on a spiral tooth of an orbiting scroll and a fixed scroll of one of the expansion mechanism or the auxiliary compression mechanism.

Abstract: A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll.

Abstract: The present invention provides a scroll compressor that has reduced leakage loss and high efficiency. In the present invention, an orbiting scroll 31 that has spiral teeth 31L and 31M on two surfaces, and a fixed scrolls 33 and 34 that are installed so as to face the surfaces of the orbiting scroll 31 and that have spiral teeth 33E and 34E that intermesh with the spiral teeth 31L and 31M of the orbiting scroll 31 are included, and tip seals are mounted only to a spiral tooth of the fixed scroll that intermeshes with a first spiral tooth of the orbiting scroll 31 and to the first spiral tooth of the orbiting scroll 31.

Abstract: An accumulator is capable of preventing an excessive enlargement of the flow rate of a liquid refrigerant which is discharged from the accumulator, reducing the quantity of refrigerating machine oil which is accumulated in the accumulator, and maintaining a required quantity of refrigerating machine oil in a compressor. Liquid and a gas which circulate in a refrigerating and air-conditioning circuit are introduced into a first space by a suction pipe, and the gas refrigerant is discharged to a refrigerating and air-conditioning circuit through a gas passage pipe, a second space and a discharge pipe 5. A liquid-level maintaining mechanism prevents a rise in the height of the accumulated liquid introduced into the first space. When the height has been made to be not lower than a predetermined height, a gas communication mechanism moves liquid in the first space from the first space to the second space.

Abstract: In an accumulator constituting a refrigerating cycle apparatus, a high liquid-level auxiliary pipe (14a) and a low liquid-level auxiliary pipe (14b), which act as oil recovery pipes, and each of which is provided with a plurality of oil recovery holes (10a), are attached to a discharge pipe (12) in positions so as to be different vertically from each other, so that lubricating oil can be surely recovered through the oil recovery holes.

Abstract: In an accumulator, an oil collecting pipe is held in a sealed vessel with the lower end thereof closed, the pipe has a plurality of oil collecting apertures spaced in a vertical direction and a communication port for communicating with a discharge pipe. The communication port is disposed in the vicinity of the lowermost oil collecting aperture or to the downstream side of the aperture. Therefore, excessive liquid refrigerant flow from the accumulator is prevented even if a large amount of the liquid refrigerant resides in the sealed vessel.

Abstract: A scroll-type fluid machine includes a fixed scroll having a spiral wall; an orbiting scroll having a base plate which is on one side provided with a spiral wall, the orbiting scroll having the spiral wall combined with the spiral wall of the fixed scroll. A rotation preventing mechanism prevents the orbiting scroll from rotating about its own axis. A driving shaft is driven by a driving source, which has an eccentric portion, the eccentric portion causing the orbiting scroll to carry out orbiting movement through an orbiting bearing. A counter-weight is coupled to the driving shaft in such manner that it takes an eccentric position at the side remote from the eccentric portion of the driving shaft and it has a play with respect to the driving shaft in a radial direction, which can balance with at least part of a centrifugal force caused at the orbiting scroll side, and which has radial movement controlled by the orbiting scroll side.

Abstract: An improved Stirling engine has a piston and a crosshead slidably disposed inside a cylinder and secured to one another by a piston rod so as to reciprocate as a single body with a space formed between the crosshead and the piston. An oil-deflecting guard for deflecting oil which is scattered by the movement of the crosshead is disposed between the crosshead and the piston and is supported so as to move with the crosshead. A first oil-absorbing member for absorbing oil which enters the space above the oil-deflecting guard is disposed on the oil-deflecting guard on the piston side thereof. A second oil-absorbing member is disposed between the first oil-absorbing member and the piston with a space therebetween. The space between the crosshead and the piston can be connected with the inside of a crankcase by oil drainage holes.

Abstract: A seal means for use in the Stirling engine or the like, the seal means comprising: a cylinder including a piston reciprocating therein, and a buffer chamber located in one of the spaces produced at the both sides of the piston; a tank for storing the working fluid in the buffer chamber when the engine is at rest, the tank being located outside the cylinder; a means for introducing the working fluid in the tank into the buffer chamber under pressure when the engine is started; a crank shaft driven by means of the piston through a piston rod; a crankcase for accommodating the crank shaft; a plurality of packings for preventing the working fluid in the buffer chamber from entering the crankcase by flowing along the outer surface of the moving piston rod, the packings being arranged in contact with the outer surface of the piston rod; and a means for returning the working fluid leaked in the packings from the buffer chamber through the moving piston rod to the buffer chamber.

Abstract: The disclosed rolling piston type compressor comprises a needle bearing sandwiched between two bearing washers and serving as a thrust bearing for a rotary shaft and a resilient sealing ring of polytetrafluoroethylene press fitted into a space defined by the outer periphery of the needle bearing and the two bearing washers. Alternatively the sealing ring may be formed of cast iron and seal the space with an oil film disposed in a clearance between the ring and one of the bearing washers.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated by lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

Abstract: A multiple cylinder rotary compressor in which a capacity control is effected in response to a fluctuating load so that a saving of energy to be consumed is intended by means of such control that a supply of a low-pressure refrigerant gas is interrupted with respect to eigher compression element of at least two compression elements in the multiple cylinder rotary compressor etc.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated with the lubricating parts effectively lubricated with the lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated with the lubricating parts effectively lubricated with the lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.