A conduction noise filtering circuit configured to inhibit conduction noise is provided. The conduction noise filtering circuit includes a first coil part configured to be supplied with alternating current (AC) power, a second coil part configured to be connected to the first coil part in series, a detector configured to detect common mode noise from at least one selected from the first coil part and the second coil part, and a capacitor configured to supply a current offsetting common mode noise between power lines connecting the first coil part and the second coil part in series, based on an output signal of the

An exemplary embodiment of the present disclosure provides an intake device including: an annular flow path which is formed in a circular housing; an inlet part which is installed at one side of the housing and guides an inflow of a fluid into the flow path; a outlet part which is installed at the other side of the housing and guides a discharge of the fluid which flows into the inlet part and passes through the flow path; a piston which is disposed in the flow path, and rotates along the flow path so as to compress the fluid introduced through the inlet part; and an opening and closing unit which is installed in the flow path between the inlet part and the outlet part, includes a plurality of opening and closing members, and elastic members which are installed between the plurality of opening and closing members and the flow path so as to support the plurality of opening and closing members, respectively, and opens and closes the flow path by pressing the piston, in which when the pressing of the piston is released, the plurality of opening and closing members closes the flow path by pressing force of the fluid which presses outer circumferential surfaces of the plurality of opening and closing members in a direction in which the flow path is closed, and by elastic force of the elastic member.

An exemplary embodiment of the present disclosure provides an intake device including: an annular flow path which is formed in a circular housing; an inlet part which is installed at one side of the housing and guides an inflow of a fluid into the flow path; a outlet part which is installed at the other side of the housing and guides a discharge of the fluid which flows into the inlet part and passes through the flow path; a piston which is disposed in the flow path, and rotates along the flow path so as to compress the fluid introduced through the inlet part; and an opening and closing unit which is installed in the flow path between the inlet part and the outlet part, includes a plurality of opening and closing members, and elastic members which are installed between the plurality of opening and closing members and the flow path so as to support the plurality of opening and closing members, respectively, and opens and closes the flow path by pressing the piston, in which when the pressing of the piston is released, the plurality of opening and closing members closes the flow path by pressing force of the fluid which presses outer circumferential surfaces of the plurality of opening and closing members in a direction in which the flow path is closed, and by elastic force of the elastic member.

A compressor device includes a compressor for compressing a gas to generate a compressed gas having at least one compressor stage, and a cooling device including an oil cooler for cooling oil heated by the compressor, a compressed gas cooler for cooling the gas that is completely or partially compressed to form the compressed gas, and a housing cooler for cooling a housing or part of the housing of the compressor. The oil cooler, the compressed gas cooler, and the housing cooler each achieve cooling by a coolant flow consisting of a liquid coolant. The compressor device further includes a housing cooler control means for individually controlling the cooling flow through the housing cooler, and a cooling control configured to actuate the housing cooler control means in such a way that the coolant flow is controlled by the housing cooler independently of the cooling flow through the oil cooler.

A compressor device includes a compressor for compressing a gas to generate a compressed gas having at least one compressor stage, and a cooling device including an oil cooler for cooling oil heated by the compressor, a compressed gas cooler for cooling the gas that is completely or partially compressed to form the compressed gas, and a housing cooler for cooling a housing or part of the housing of the compressor. The oil cooler, the compressed gas cooler, and the housing cooler each achieve cooling by a coolant flow consisting of a liquid coolant. The compressor device further includes a housing cooler control means for individually controlling the cooling flow through the housing cooler, and a cooling control configured to actuate the housing cooler control means in such a way that the coolant flow is controlled by the housing cooler independently of the cooling flow through the oil cooler.

A method of updating the program of a gas compressor system is provided. The system has gas compressors, a controller that controls the gas compressors by a program, a discharge piping system coupled with each of the gas compressors, and a control terminal that controls the controller of the gas compressors. Gas discharged from the discharge piping system is controlled by the controller by at least one of a predetermined pressure value and flow rate of the gas value, including obtaining a program update, updating the program for a first gas compressor in operation that is a target of the program update among the gas compressors, and operating at least one of a second or a third gas compressor of the gas compressors based on the predetermined pressure value and the predetermined flow rate of the gas value.

Assemblies, apparatuses, and methods to extract or convey a material from a source of the material may include a vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may include a compressor housing having a vacuum source, a cooling system, and a vacuum controller. The vacuum source may include a compressor powered by an electric motor and positioned to cause a vacuum flow between the source of the material, and the vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may further include a sound attenuation chamber positioned to receive at least a portion of the vacuum flow from, and attenuate sound generated by, the vacuum source. The compressor housing and sound attenuation chamber of the vacuum generation and sound attenuation assembly may be arranged compactly on a common chassis for ease of transport and deployment.

Assemblies, apparatuses, and methods to extract or convey a material from a source of the material may include a vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may include a compressor housing having a vacuum source, a cooling system, and a vacuum controller. The vacuum source may include a compressor powered by an electric motor and positioned to cause a vacuum flow between the source of the material, and the vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may further include a sound attenuation chamber positioned to receive at least a portion of the vacuum flow from, and attenuate sound generated by, the vacuum source. The compressor housing and sound attenuation chamber of the vacuum generation and sound attenuation assembly may be arranged compactly on a common chassis for ease of transport and deployment.

A compression mechanism, and a scroll compressor, for the scroll compressor are provided, wherein the compression mechanism includes a movable scroll having a movable scroll end plate and a fixed scroll having a fixed scroll end plate. A movable scroll blade and a fixed scroll blade are engaged with each other to form a series of compression cavities between the movable scroll and the fixed scroll. A series of compression cavities include a central compression cavity and fluid compression cavities located on the radial lateral side of the central compression cavity. The compression mechanism is provided with a drainage channel and a drainage control mechanism, which enables the drainage channel to selectively provide fluid communication between a first fluid compression cavity in the fluid compression cavities and the outside of the compression mechanism.

A compression mechanism, and a scroll compressor, for the scroll compressor are provided, wherein the compression mechanism includes a movable scroll having a movable scroll end plate and a fixed scroll having a fixed scroll end plate. A movable scroll blade and a fixed scroll blade are engaged with each other to form a series of compression cavities between the movable scroll and the fixed scroll. A series of compression cavities include a central compression cavity and fluid compression cavities located on the radial lateral side of the central compression cavity. The compression mechanism is provided with a drainage channel and a drainage control mechanism, which enables the drainage channel to selectively provide fluid communication between a first fluid compression cavity in the fluid compression cavities and the outside of the compression mechanism.