Hermetic compressor
AssigneeLG Electronics Inc.
InventorsMingeon Jeong, Bokann Park, Kyoungjun Park, Seeun Kim
Life of this patent
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Abstract
A hermetic compressor may include a frame, a crankshaft, and an oil pump. The crankshaft may be rotatably mounted to the frame. The oil pump may be mounted to a lower portion of the crankshaft to be rotatable together with the crankshaft. The oil pump may pump oil from a lower region to an upper region of a shell using centrifugal force. The crankshaft may be provided with a hollow hole therein that is inclined in two directions with respect to an axial direction of the crankshaft. This may result in increasing a dynamic pressure for scattering the oil to the upper region of the shell and an oil supply amount.
Claims18
A hermetic compressor, comprising:
- a frame disposed inside of a shell;
- a crankshaft having a hollow hole therein and rotatably mounted to the frame;
- and
- an oil pump mounted to a lower portion of the crankshaft and having an impeller rotatable together with the crankshaft, wherein a first side of the impeller is immersed in oil stored in a lower region of the shell and a second side of the impeller communicates with the hollow hole such that the oil is pumped from the first side to the second side by centrifugal force, wherein the hollow hole comprises an inclined region and a vertical region that extends along an axial direction of the crankshaft and eccentric from a center of the crankshaft in a radial direction of the crankshaft, wherein a central axis of the inclined region, based on an orthogonal XYZ coordinate system having a Z-axis aligning with a rotational axis of the crankshaft, is inclined in X-axis and Y-axis directions with respect to the Z-axis on both a YZ plane and an XZ plane of the orthogonal XYZ coordinate system when the central axis of the inclined region is projected to the respective planes, and wherein the crankshaft further comprises an axial through hole formed through the crankshaft in the axial direction of the crankshaft from one end of the hollow hole.
A hermetic compressor, comprising:
- a shell;
- a frame elastically supported inside of the shell in a vertical direction;
- a crankshaft having a hollow hole therein and rotatably mounted to the frame;
- a motor unit disposed below the frame and including a rotor that rotates the crankshaft;
- a compression unit disposed above the frame, and including a piston that performs a reciprocating motion in a cylinder by receiving a drive force through a connecting rod connected to the crankshaft, so as to compress a refrigerant suctioned into the cylinder;
- and
- an oil pump mounted to a lower portion of the crankshaft to be rotatable with the crankshaft, and having a first end immersed in oil stored in a lower region of the shell and a second end that communicates with the hollow hole, so as to pump the oil from the first end to the second end using centrifugal force, wherein the hollow hole comprises:
- an inclined region inclined in two directions with respect to an axial direction of the crankshaft;
- and
- a vertical region that extends along the axial direction of the crankshaft and eccentric from a center of the crankshaft in a radial direction, to apply a dynamic force for scattering the oil to an upper region of the shell, wherein axial extents of the inclined region and the vertical region circumferentially overlap one another, wherein a central axis of the inclined region, based on an orthogonal XYZ coordinate system having a Z-axis aligning with a rotational axis of the crankshaft, is inclined in X-axis and Y-axis directions with respect to the Z-axis on both a YZ plane and an XZ plane of the coordinate system when the central axis of the inclined region is projected to the respective planes, and wherein the crankshaft further comprises an axial through hole formed through the crankshaft in the axial direction of the crankshaft from one end of the hollow hole.
Dependencies are inferred from the claim text.