Compressor
AssigneePanasonic Corporation
InventorYoshinori Ishida
Life of this patent
Estimating the term…
Abstract
A compressor which includes a piston (150) reciprocating in a cylinder bore (111) provided in a cylinder block. Length of the circumferential surface at the compression load side (160) is made to be longer than that at the anti-compression load side (170), so that area of sliding-contact surface at the compression load side is greater than that at the anti-compression load side. The above configuration is effective to prevent occurrence of wearing due to unsymmetrical contact of piston with cylinder bore. Thus, deterioration in the refrigeration capability and instability of the performance is prevented.
Claims13
A compressor comprising a motor element and a compression element driven by the motor element, both elements being disposed in a housing which stores oil,
- the compression element comprising
- a crankshaft having a main shaft and an eccentric shaft coupled with the main shaft,
- a cylinder block which supports the main shaft so that the shaft can revolve freely, the cyclinder block being and provided with a cylinder bore for forming a compression chamber,
- a piston which reciprocates in the cylinder bore, and
- a connection structure which connects the piston with the eccentric shaft;
- wherein
- an area of a sliding-contact surface formed on the piston in the cylinder bore at a compression load side is greater than that at an anti-compression load side.
A compressor comprising
- a crankshaft formed of a main shaft and an eccentric shaft coupled with the main shaft at the upper part,
- a cylinder block which supports the main shaft so that the shaft can revolve freely, the cylinder clock being provided with a cylinder bore for forming a compression chamber,
- a piston which reciprocates in the cylinder bore, and
- a connection structure which connects the piston with the eccentric shaft and undergoes a pendulum action with respect to the piston;
- wherein
- a side of a circumferential surface of the piston located in the same side as the connection structure at its compression stroke, with respect to a reference plane, has a smaller sliding surface than a sliding surface located in the opposite side, the reference plane being a plane perpendicular to the pendulum action plane and includes a center axis of the piston.
Dependencies are inferred from the claim text.