A system includes a compressor and a mounting apparatus for mounting the compressor. The compressor is held exclusively by way of the mounting apparatus. The mounting apparatus includes two pendulum-type bearings and a hinged support.

A method for expanding a compressed gas (GD) at a gas pressure (pD) with a reciprocating-piston machine, wherein the reciprocating-piston machine includes a piston that can move to and fro and a working chamber delimited by the movable piston. The method being carried out as follows: the compressed gas (GD) is supplied to the working chamber via an actuatable rotary slide valve, wherein the compressed gas (GD) in the working chamber is expanded in the working chamber.

Provided is a linear compressor. The linear compressor includes a stator cover coupled to the frame, a rear cover coupled to the stator cover, and springs disposed between the stator cover and the rear cover. The stator cover includes a body and a plurality of rear cover coupling parts extending from the body toward the rear cover and coupled to the rear cover, and the rear cover has a plane that is perpendicular to the axial direction so that an end of the rear cover coupling part and an end of the spring are disposed on the same plane in the axial direction. Also, other embodiments may be possible.

An apparatus including a first piston member rotatable about a first rotational axis and a rotor with a first chamber and pivotable about a second rotational axis. The first piston member extends across the first chamber. The rotor and first piston member are rotatable around the first rotational axis, and the rotor is pivotable about the second rotational axis to permit a relative pivoting motion between the rotor and the first piston member linked to the rotor rotating about the first rotational axis.

A package type fluid machine includes a plurality of compressor bodies; a machine compartment in which the plurality of compressor bodies are disposed; an exhaust duct that exhausts a cooling gas from the machine compartment; a plurality of aftercoolers that are disposed inside the exhaust duct to cool a compressed fluid from the compressor bodies; and a shield that is disposed between the aftercoolers to shield a flow of the cooling gas.

An active gas regenerative refrigerator includes a plurality of compressor-expander units, each having a hermetic cylinder with a drive piston configured to be driven reciprocally therein, and a quantity of working fluid in each end of the cylinder. A piston seal in a central portion of the cylinder prevents passage of the working fluid between ends of the cylinder. Movement of the piston to a first extreme results in radial compression of one of the quantities of working fluid in a cylindrical gap formed between one end of the piston and an inner surface of the cylinder, while the other quantity is expanded in the opposite end of the cylinder. The piston includes a plurality of magnets arranged in pairs, with magnets of each pair positioned with like-poles facing each other. A piston drive is configured to couple with transverse magnetic flux regions formed by the magnets.

An apparatus including a first piston member rotatable about a first rotational axis and a rotor with a first chamber and pivotable about a second rotational axis. The first piston member extends across the first chamber. The rotor and first piston member are rotatable around the first rotational axis, and the rotor is pivotable about the second rotational axis to permit a relative pivoting motion between the rotor and the first piston member linked to the rotor rotating about the first rotational axis.

Embodiments of the disclosure include a miniature optical PM sensor module. A miniature optical particulate matter sensor module may comprise a housing; a micro airflow generator positioned within the housing; an actuator positioned adjacent to the micro airflow generator and configured to drive the micro airflow generator; a miniature particulate matter sensor board assembly in fluid communication with the micro airflow generator; and a flex cable assembly configured to attach to at least one of the housing and the miniature particulate matter sensor board assembly.

A gas ejection apparatus includes a cylindrical cylinder, cylinder walls, blades, and a gas sending outlet. The cylinder walls divide an inside of the cylinder into a plurality of chambers. The blades send out gas in the plurality of chambers to an outside of the cylinder by a rotary motion of the blades that compresses the gas. The gas sending outlet is provided to each of the plurality of chambers on an end wall of the cylinder adjacent to a circumference of the cylinder.

A gas ejection apparatus ejects gas using a compressor that compresses the gas by a rotating body inside a cylinder, and includes a detector and a microcomputer. The detector detects a position of the rotating body inside the cylinder based on positions of gears which are coupled to the rotating body. When the microcomputer receives an ejection instruction, the microcomputer controls intake and exhaust of the compressor according to detection results of the detector, and causes the compressor to wait in an intake completion state upon completion of ejection of the gas that was performed in response to the ejection instruction.