A fluid transportation system and method use a negative pressure driving mode to absorb fluids from a fluid storage assembly and a positive pressure driving mode to load the absorbed fluids into the fluid-using system. At least two working modules are used to transport fluids to the fluid-using system, the process of transporting fluid in each working module being divided into the processes of absorbing fluids into a fluid transfer assembly, and loading fluids into a fluid transfer assembly. The process of absorbing fluids in each working module and the processes of absorbing fluids and/or loading fluids in any other working module overlap at least partially along the time axis. With the present disclosure, the accuracy and speed of fluids transportation are improved, a device utilizing the system and method is also disclosed.

A fluid transportation system and method use a negative pressure driving mode to absorb fluids from a fluid storage assembly and a positive pressure driving mode to load the absorbed fluids into the fluid-using system. At least two working modules are used to transport fluids to the fluid-using system, the process of transporting fluid in each working module being divided into the processes of absorbing fluids into a fluid transfer assembly, and loading fluids into a fluid transfer assembly. The process of absorbing fluids in each working module and the processes of absorbing fluids and/or loading fluids in any other working module overlap at least partially along the time axis. With the present disclosure, the accuracy and speed of fluids transportation are improved, a device utilizing the system and method is also disclosed.

A variable displacement swash-plate compressor includes an actuator that changes the inclination angle of a swash plate. The actuator includes a movable body that moves along a drive shaft axis. The movable body includes an acting portion that pushes the swash plate. The swash plate includes a receiving portion that contacts and is pushed by the acting portion. The acting portion and the receiving portion contact each other at an acting position. A bottom dead center associated part for positioning the piston at a bottom dead center is defined on the swash plate. When the drive shaft and the acting position are viewed from a direction that is perpendicular to a top dead center plane containing the top dead center associated part and the drive shaft axis, the acting position is defined at a position overlapping with the drive shaft regardless of the inclination angle.

A variable displacement swash-plate compressor includes an actuator that changes the inclination angle of a swash plate. The actuator includes a movable body that moves along a drive shaft axis. The movable body includes an acting portion that pushes the swash plate. The swash plate includes a receiving portion that contacts and is pushed by the acting portion. The acting portion and the receiving portion contact each other at an acting position. A bottom dead center associated part for positioning the piston at a bottom dead center is defined on the swash plate. When the drive shaft and the acting position are viewed from a direction that is perpendicular to a top dead center plane containing the top dead center associated part and the drive shaft axis, the acting position is defined at a position overlapping with the drive shaft regardless of the inclination angle.

A capacity control valve includes a valve housing provided with a suction fluid supply chamber to which a suction fluid of suction pressure Ps is supplied, and a control fluid supply chamber to which a control fluid of control pressure Pc is supplied, a CS valve formed by a CS valve element driven in the axial direction by a solenoid, and a CS valve seat provided in a communication passage between the control fluid supply chamber and the suction fluid supply chamber, the CS valve being connectable to and separable from the CS valve seat, and a pressure drive portion arranged in the control fluid supply chamber in a sealed manner and biasing the CS valve element in the opposite direction to the driving direction by the solenoid.

A capacity control valve includes a valve housing provided with a suction fluid supply chamber to which a suction fluid of suction pressure Ps is supplied, and a control fluid supply chamber to which a control fluid of control pressure Pc is supplied, a CS valve formed by a CS valve element driven in the axial direction by a solenoid, and a CS valve seat provided in a communication passage between the control fluid supply chamber and the suction fluid supply chamber, the CS valve being connectable to and separable from the CS valve seat, and a pressure drive portion arranged in the control fluid supply chamber in a sealed manner and biasing the CS valve element in the opposite direction to the driving direction by the solenoid.

A system and method for controlling a system that includes fixed speed and variable speed compressors are described. The method generally allows the system, for example, a heating, ventilating, and air condition (HVAC) system that includes fixed speed and variable speed compressors, to maximize unit modulating capability. The method allows the use of a variable speed compressor that is relatively smaller, which can lead to cost savings, easier installation, manufacturing, etc.

A system and method for controlling a system that includes fixed speed and variable speed compressors are described. The method generally allows the system, for example, a heating, ventilating, and air condition (HVAC) system that includes fixed speed and variable speed compressors, to maximize unit modulating capability. The method allows the use of a variable speed compressor that is relatively smaller, which can lead to cost savings, easier installation, manufacturing, etc.

A method for operating a pressure control system having a multi-stage compressor includes providing a multiply compressed pressure medium by the multi-stage compressor for filling a pressure medium reservoir or pressure medium chambers of the pressure control system. Providing the multiply compressed pressure medium includes (i) providing, by a first compression stage, a pre-compressed pressure medium and additionally compressing, at least by a second compression stage, the pre-compressed pressure medium, and/or (ii) introducing an already-compressed charging pressure medium into an intermediate volume between the first compression stage and the second compression stage of the multi-stage compressor and further compressing the charging pressure medium at least by the second compression stage. The charging pressure medium simultaneously passes via a control line to a control input of a shut-off valve that interacts with the first compression stage, such that a charging pressure of the charging pressure medium predefines a control pressure.

A variable pressure air pump includes a first cylinder and a second cylinder movable relative to the first cylinder along a longitudinal axis. An air tube is mounted in the first and second cylinders. A mounting portion is integrally formed on a first end of the air tube. A first piston and a second piston compress air in the first and second cylinders. A connecting device is mounted to the first cylinder for coupling with an object to be inflated. An air escape device selectively seals a second chamber of the second cylinder to selectively compress the air in the second cylinder. A first check valve is mounted to the mounting portion of the air tube. A second check valve is mounted to the second piston.