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US 8,708,661 B2Granted
Compressor with oil level controller
AssigneeLG Electronics Inc.
InventorsYunhi Lee, Jangwoo Lee, Seungjun Lee
Life of this patent
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Abstract
A compression device includes a controller to control an operating speed of a compressor based on a detected level of oil in an oil storage area. During a speed-change operation, the controller controls acceleration of the compressor to maintain the oil level within a predetermined range when the oil level is detected to be outside the predetermined range.
Claims17
A compression device, comprising:
- a casing;
- a compressor in the casing, the compressor comprising:
- a cylinder with a compression chamber;
- a rolling piston eccentrically coupled to the cylinder;
- a shaft including an oil feeder coupled to the rolling piston;
- and
- upper and lower bearings adjacent upper and lower sides of the cylinder, respectively;
- a driver to drive the compressor;
- a detector to detect a level of oil in an oil storage area;
- and
- a controller to control an operating speed of the compressor based on the detected oil level,
- wherein, during a speed-change operation, the controller controls acceleration of the compressor to maintain the oil level within a predetermined range when the oil level is detected to be outside the predetermined range, and
- wherein the controller stops acceleration of the compressor and maintains the operating speed of the compressor at a substantially constant speed for a predetermined time when the oil level is detected to be lower than a lowermost portion of the oil feeder during the speed-change operation.
10 more elements
A compression device, comprising:
- a compressor, comprising:
- a cylinder with a compression chamber;
- a rolling piston eccentrically coupled to the cylinder;
- a shaft including an oil feeder coupled to the rolling piston;
- and
- upper and lower bearings adjacent upper and lower sides of the cylinder, respectively;
- a driver to drive the compressor;
- a detector to detect a level of oil in an oil storage area;
- and
- a controller to control a rate of change of a speed of the compressor during a speed-change operation,
- wherein the controller changes the rate of change of the compressor speed based on the detected oil level during the speed-change operation, the rate of change of the compressor speed causing an amount of oil in the oil storage area to change, and
- wherein the controller makes a rate of change of a speed of the compressor to zero and maintains the operating speed of the compressor at a substantially constant speed for a redetermined time when the oil level is detected to be lower than a lowermost portion of the oil feeder during the speed-change operation.
9 more elements
A compression device, comprising:
- a casing;
- a compressor in the casing, the compressor comprising:
- a cylinder with a compression chamber;
- a rolling piston eccentrically coupled to the cylinder;
- a shaft including an oil feeder coupled to the rolling piston;
- and
- upper and lower bearings adjacent upper and lower sides of the cylinder, respectively;
- a driver to drive the compressor;
- a plurality of oil level detectors to detect a level of oil in an oil storage area;
- and
- a controller to control an operating speed of the compressor based on the detected oil level,
- wherein, during a speed-change operation, the controller controls acceleration of the compressor to maintain the oil level within a predetermined range when the oil level is detected to be outside the predetermined range, and
- wherein the plurality of oil level detectors are located at a height substantially coincident with a lower surface of the rolling piston, an upper portion of the oil feeder, and a lower portion of the oil feeder, respectively.
10 more elements
Dependencies are inferred from the claim text.