Fluid machine

A fluid machine for a system having an engine comprising:

• a waste heat collecting cycle for collecting waste heat from the engine and having an expansion device for generating rotational driving force from the collected waste heat;
• an ON-OFF control valve at an upstream side of the expansion device;
• and
• an engine accessory operatively connected to the engine and driven by a driving force from the engine, wherein
• a rotating shaft is commonly used as shafts for the expansion device and the engine accessory, and
• the expansion device is an expansion device for changing its expansion volume.

A fluid machine for a system having an engine comprising:

• a waste heat collecting cycle for collecting waste heat from the engine and having an expansion device for generating rotational driving force from the collected waste heat;
• a pulley operatively connected to the engine and driven by a rotational driving force of the engine;
• a compressor device constituting a refrigerating cycle;
• and
• a rotating shaft commonly used as shafts for the expansion device, the pulley and the compressor device.

A fluid machine for an automotive vehicle having an internal combustion engine comprising:

• a pulley operatively connected to the engine and rotationally driven by a rotational driving force from the engine;
• a waste heat collecting cycle for collecting waste heat from the engine and having an expansion device for generating rotational driving force from the collected waste heat;
• a compressor device constituting a refrigerating cycle and operatively connected to the pulley and driven by the driving force from the engine over the pulley;
• and
• a rotating shaft commonly used as shafts for the pulley, the expansion device and the compressor device,
• wherein the expansion device is an expansion device for changing its expansion volume.

A fluid machine for an automotive vehicle having an internal combustion engine comprising:

• a waste heat collecting cycle for collecting waste heat from the engine and having an expansion device for generating rotational driving force from the collected waste heat;
• an electric rotating machine selectively operating as an electric generating device and as an electric motor;
• a compressor device constituting a refrigerating cycle and operatively connected to the expansion device and the electric rotating machine and driven by the driving force from at least one of the expansion device and the electric rotating machine;
• and
• a rotating shaft commonly used as shafts for the expansion device, the electric rotating machine and the compressor device.

A fluid machine for an automotive vehicle having an internal combustion engine comprising:

• a pulley operatively connected to the engine and rotationally driven by a rotational driving force from the engine;
• a waste heat collecting cycle for collecting waste heat from the engine and having an expansion device for generating rotational driving force from the collected waste heat;
• a compressor device constituting a refrigerating cycle and operatively connected to the pulley and driven by the driving force from the engine over the pulley;
• a hot gas bypass passage connecting the outlet side of the compressor side to an inlet side of an evaporator of the refrigerating cycle;
• a valve means provided in the hot gas bypass passage for selectively opening and closing the bypass passage;
• and
• a rotating shaft commonly used as shafts for the pulley, the expansion device and the compressor device.