Lg Electronics Inc.

Min Young Seo

Dal Soo Kang

Kee Joo Kim

Chul Gi Roh

Kyoung Jun Park

Jong Bong Kim

Hee Hyun Kim

Hyun Sook Kim

June Soo Hur

Cheal Lak Choi

Young Ju Bae

Jae Sung Sim

Hyeon Jun Kim

Young Joo Bae

Cheol Ki No

Chul Gi Rho

Jai Seong Sim

A dual capacity compressor, which can maintain a fixed eccentricity and stable operation, even when the compressor is rotated in both the regular and reverse directions in order to provide multiple compression capacities, is provided. This dual capacity compressor implements an improved key member and associated key member fitting parts to inhibit relative motion of the crank pin and the eccentric sleeve during operation, so as to reduce or eliminate a destabilizing effect due to centrifugal forces on the eccentric sleeve and external forces applied through the connecting rod.

Dual capacity compressor

Dual capacity compressor including a power generating part () having a reversible motor () and a crank shaft () inserted in the motor (), a compression part () having a cylinder (), a piston (), and a connecting rod (), a crank pin () in an upper part of the crank shaft () eccentric to an axis of the crank shaft, an eccentric sleeve () rotatably fitted to the crank pin (), and the connecting rod () respectively, a key member () for positive fastening of the eccentric sleeve () to the crank pin () in all rotation directions of the motor, and an eccentric mass () provided to the eccentric sleeve () for rotating the eccentric sleeve () around the crank pin (), thereby preventing relative motion between components that sustain the eccentricity, and permitting a smooth motion between the components.

A crankshaft in a dual capacity compressor is disclosed, which causes oil contained in a lower portion of the compressor to flow up to an upper portion thereof with respect to all the rotational directions of a motor. A crank shaft () includes a driving shaft () inserted into a reversible motor () for rotating along with the motor (), a balance weight () formed in a top portion of the driving shaft () for preventing vibration during rotation from occurring, a crank pin () formed on an upper surface of the balance weight () to be eccentric from the center of the driving shaft (), and a regular/reverse oil path () formed along the balance weight () and the crank pin () for moving oil for forward rotation and reverse rotation of the motor respectively. The crankshaft serves to stably lubricate each driving part of the dual capacity compressor regardless of rotation direction.

Crank shaft in dual capacity compressor

Dual capacity compressor including a power generating part including a reversible motor and a crank shaft inserted in the motor, a compression part including a cylinder, a piston in the cylinder, and a connecting rod connected to the piston, a crank pin in an upper part of the crank shaft eccentric to an axis of the crank shaft, an eccentric sleeve having an inside circumferential surface rotatably fitted to an outside circumferential surface of the crank pin, and an outside circumferential surface rotatably fitted to an end of the connecting rod, a key member for coupling the eccentric sleeve with the crank pin positively in all rotation directions of the motor, and damping means for damping impact occurred between the eccentric sleeve and members adjoin thereto, thereby preventing relative motion and wear/noise between parts that maintain an eccentricity.

Growing community of inventors

Kyongsangnam-do, South Korea

Min Young Seo