Abstract: A displacement control system (A) of a variable displacement compressor sets a target for pressure in an intake chamber or a crank chamber, on the basis of a detected evaporator-outlet air temperature and a target for evaporator-outlet air temperature. The pressure of a refrigerant in a high-pressure section is detected, and a regulating current is supplied to a solenoid (316) of a displacement control valve, on the basis of the pressure of the refrigerant in the high-pressure section and the target for pressure.

Abstract: In a swash plate type compressor, provided is an introduction flow passage through which refrigerant is introduced from a suction chamber. Further, a differential pressure control valve is provided on the introduction flow passage. The differential pressure control valve acts due to a differential pressure (Pc?Ps) between a crank pressure Pc and a suction pressure Ps. An opening of the introduction flow passage is adjusted by the differential pressure control valve so as to prevent the crank pressure Pc from exceeding a predetermined value. According to the swash plate type compressor, an excessive elevation of the crank pressure Pc can be prevented without a usage of a check valve.

Abstract: A pumping machine, that can serve a system as the sole main pump for pressurizing a primary liquid flow, incorporates, in a single machine, a rotor-drum type AP (axial piston) pump and a PX (pressure exchanger) that recovers energy from a secondary liquid flow such as the brine discharge from an RO seawater desalination system, with benefits including fewer moving parts and small machine size along with lower capital and operating costs. A single rotor-drum containing the cylinders and pistons is located between two end blocks, one or both configured with manifold passageways, ports and sliding valves. A swash-plate at one end reciprocates the pistons axially when the rotor-drum is rotated.

Abstract: A compressor shaft has a fluid inlet that leads into a fluid inlet tube, is perpendicular to a longitudinal hole in the length of the shaft. An intermediate inlet into the longitudinal hole is located between the fluid inlet and an outlet at an end of the longitudinal hole. A drive plate mounted to the compressor shaft has a protruding drive arm, which uses a holding mechanism to connect to a swash plate. At certain swash plate angles, the intermediate inlet is covered and sealed by the swash plate, or uncovered. The drive arm defines an internal bore and a through slot. At opposite ends, the bore merges into the longitudinal hole and open into the through slot. The holding mechanism and/or swash plate guide covers the bore in the slot.

Abstract: A displacement control valve for an air conditioner modulating a fluid flow or fluid pressure within a control chamber by controlling the opening degree of a valve portion.

Abstract: A pumping machine, that can serve a system as the sole main pump for pressurizing a primary liquid flow, incorporates, in a single machine, a rotor-drum type AP (axial piston) pump and a PX (pressure exchanger) that recovers energy from a secondary liquid flow such as the brine discharge from an RO seawater desalination system, with benefits including fewer moving parts and small machine size along with lower capital and operating costs. A single rotor-drum containing the cylinders and pistons is located between two end blocks, one or both configured with manifold passageways, ports and sliding valves. A swash-plate at one end reciprocates the pistons axially when the rotor-drum is rotated.

Abstract: Three or more diaphragm pumps (12,14,16) are interconnected to sequentially receive an activation fluid from corresponding piston and cylinder pumps (18,20,22) synchronized by a control mechanism (24) which includes a distributor plate (42) with directive shallow slots (80,82,84) for conduiting activation fluid to a porting plate (44) and via openings (60,62,64) to the piston and cylinder pumps (18,20,22).

Abstract: In a housing, a rotor is secured to a drive shaft, and a sleeve is supported movably on the drive shaft. A rotary swash plate is tiltably supported on the sleeve and is coupled to the rotor. Coupled to the rotary swash plate are pistons which move in the respective bores. A refrigerant is supplied to each bore from a suction chamber, and the refrigerant compressed by each piston is discharged from the bores to a discharge chamber. A control valve controls the difference between the pressure in the suction chamber and the pressure in a crank chamber to change the inclination angle of the rotary swash plate, so that the discharge displacement of a compressor becomes variable. In the housing, a spool is slidably provided while enclosing the drive shaft. With the spool advancing into the crank chamber, (when the sleeve engages with the spool,) shifting of the rotary swash plate is restricted to the position that sets the discharge displacement of the discharge chamber to a predetermined restricted displacement.

Abstract: A low side scroll compressor is protected from both the potentially damaging effects of improper electrical hookup and the development of high discharge temperatures by apparatus disposed in a passage which communicates between the suction pressure portion and a discharge pressure portion of the compressor. The apparatus operates to permit gas flow from the suction to the discharge pressure portion of the compressor through a protective passage, such as when the compressor runs backwards due to miswiring, so as to avert damage to the scroll members. The apparatus permits the flow of gas from the discharge to the suction pressure portion of the compressor through the passage when the temperature of the discharge gas produced by the compressor exceeds a predetermined temperature indicative of an abnormal compressor operating condition. The resulting gas flow in the latter case causes the compressor motor to de-energize.