Swash-plate type compressor

The swash-plate type compressor comprising:

• a drive shaft;
• at least one piston
• a cylinder block rotatable supporting said drive shaft and defining therein at least one cylinder chamber, said cylinder chamber slidably accommodating said piston to permit an axial reciprocal siding movement of said piston in said cylinder chamber;
• a swash plate rotatable mounted on said drive shaft;
• and
• a linkage having a driven connection with said drive shaft and drivingly connected to said swash plate for causing a rotational movement of said swash plate in synchronization with rotation of said drive shaft, while permitting a wobbling movement of said swash plate;
• said piston comprising:
• (a) a bottom section having a recessed portion for receiving a pair of shoes and for slidably holding side walls of said swash plate between said shoes for said axial reciprocal sliding movement of said piston;
• and
• (b) a main skirt section having a through-opening extending in a rotational direction of said swash plate, wherein said main skirt section has a shaft portion being disposed in said through-opening and aligned coaxially with respect to an axis (Co) of said piston for transmitting an axial force input from an end of said piston.

A swash-plate type compressor employing an oil-mist lubrication system in which system some compressor lubricating oil is mixed in refrigerant, comprising:

• a drive shaft;
• at least one piston;
• a cylinder block rotatably supporting said drive shaft and defining therein at least one cylinder chamber, said cylinder chamber slidably accommodating said piston to permit an axial reciprocal sliding movement of said piston in said cylinder chamber;
• a swash plate rotatable mounted on said drive shaft;
• and
• a linkage having a driven connection with said drive shaft and drivingly connected to said swash plate for causing a rotational movement of said swash plate in synchronization with rotation of said drive shaft, while permitting a wobbling movement of said swash plate;
• said piston comprising:
• (a) a bottom section having a recessed portion for receiving a pair of shoes and for slidably holdings side walls of said swash plate between said shoes for said axial reciprocal sliding movement of said piston;
• and
• (b) a main skirt section having a through opening extending in a rotational direction of said swash plate,
• wherein said main skirt section is formed integral with a ribbed portion extending from an inside portion of said main skirt section (32a) to said bottom section.

A swash-plate type compressor employing an oil-mist lubrication system in which system some compressor lubricating oil is mixed in refrigerant, comprising:

• a drive shaft;
• at least one piston;
• a cylinder block (12) rotatably supporting said drive shaft and defining therein at least one cylinder chamber and a crankcase chamber, said cylinder chamber slidably accommodating said piston to permit an axial reciprocal sliding movement of said piston in said cylinder chamber;
• a swash plate rotatably mounted on said drive shaft;
• and
• a linkage having a driven connection with said drive shaft and drivingly connected to said swash plate for causing a rotational movement of said swash plate in synchronization with rotation of said drive shaft, while permitting a wobbling movement of said swash plate;
• said piston comprising:
• (a) a bottom section having a recessed portion for receiving a pair of shoes and for slidably holding side walls of said swash plate between said shoes for said axial reciprocal sliding movement of said piston;
• and
• (b) a main skirt section having a shaft portion aligned coaxially with respect to an axis (Co) of said piston for transmitting an axial force input from an end of said piston, and a pair of through-openings extending in a rotational direction of said swash plate, outside of and inside of the shaft portion, to feed compressor lubricating oil mist in said crankcase chamber through said through-openings to an inner peripheral surface of said cylinder chamber.

A swash-plate type compressor employing an oil-mist lubrication system in which system some compressor lubricating oil is mixed in refrigerant, comprising:

• a drive shaft;
• at least one piston;
• a cylinder block rotatable supporting said drive shaft and defining therein at least one cylinder chamber and a crankcase chamber, said cylinder chamber slidably accommodating said piston to permit an axial reciprocal sliding movement of said piston in said cylinder chamber;
• a swash plate rotatable mounted on said drive shaft;
• and
• a linkage having a driven connection with said drive shaft and drivingly connected to said swash plate for causing a rotational movement of said swash plate in synchronization with rotation of said drive shaft, while permitting a wobbling movement of said swash plate;
• said piston comprising:
• (a) a bottom section having a recessed portion for receiving a pair of shoes and for slidably holding side walls of said swash plate between said shoes for said axial reciprocal sliding movement of said piston;
• and
• (b) a main skirt section having a through-opening extending in a rotational direction of said swash plate for feeding compressor lubricating oil mist in said crankcase chamber through said through-opening to an inner peripheral surface of said cylinder chamber,
• wherein said through-opening has upstream and downstream openings defined at upstream and downstream sides with respect to the rotational direction of said swash plate, and said upstream and downstream openings define outside and inside sliding surfaces being in sliding-contact with the inner peripheral surface of said cylinder chamber, and said main skirt section is formed with circumferentially-extending webbed portions projected from said outside and inside sliding surfaces toward said downstream opening so that said circumferentially-extending webbed portions are contoured along an outer peripheral surface of said main skirt section.

A swash-plate type compressor employing an oil-mist lubrication system in which system some compressor lubricating oil is mixed in refrigerant, comprising:

• a drive shaft;
• at least one piston;
• a cylinder block rotatably supporting said drive shaft and defining therein at least one cylinder chamber and a crankcase chamber, said cylinder chamber slidably accommodating said piston to permit an axial reciprocal sliding movement of said piston in said cylinder chamber;
• a swash plate rotatably mounted on said drive shaft;
• and
• a linkage having a driven connection with said drive shaft and drivingly connected to said swash plate for causing a rotational movement of said swash plate in synchronization with rotation of said drive shaft, while permitting a wobbling movement of said swash plate;
• said piston comprising:
• (a) a bottom section having a recessed portion for receiving a pair of shoes and for slidably holding side walls of said swash plate between said shoes for said axial reciprocal sliding movement of said piston;
• and
• (b) a main skirt section having a through-opening extending in a rotational direction of said swash plate for feeding compressor lubricating oil mist in said crankcase chamber through said through-opening inner peripheral surface of said cylinder chamber;
• wherein said through-opening has upstream and downstream openings defined at upstream and downstream sides with respect to the rotational direction of said swash plate, and said upstream and downstream openings define outside and inside sliding surfaces, and said main skirt section is formed with a laterally-extending webbed portion provided substantially midway between said outside and inside sliding surfaces, so that said laterally-extending webbed portion is projected into said through-opening.