Compressor and method for controlling the same
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Solution Overview
Problem
Compressors in refrigerators without a cycle matching function or controller face challenges in controlling the driving of linear motors, making it difficult to manage cooling capacity efficiently and maintain driving efficiency.
Innovation Solution
A compressor system with a piston, linear motor, sensor, and compressor controller that calculates phase differences between piston stroke and motor current, allowing the compressor to independently control the linear motor based on detected loads and adjust cooling capacity without external control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a compressor is installed in a refrigerator without a controller or cycle matching function, then the compressor cannot receive external control signals for driving cycle management, but this makes it difficult to control the linear motor driving and manage cooling capacity efficiently
Solution Approach 1:
The compressor controller detects load information independently without external controller intervention, calculates phase difference between stroke and motor current, and autonomously controls the linear motor driving cycle and cooling capacity based on detected conditions
2Productivity
If the compressor controller independently detects load information and controls linear motor driving, then cooling capacity can be managed efficiently without external controller, but this requires additional sensing and control capabilities
Solution Approach 1:
The compressor controller senses motor current through a sensor, calculates phase difference between stroke and motor current as feedback, and uses this feedback to autonomously adjust linear motor driving and cooling capacity
Solution Approach 2:
The patent replaces mechanical control methods with electronic sensing and control, using a sensor to detect motor current and a controller to calculate phase difference and manage driving cycles electronically
3Reliability
If the compressor calculates phase difference between stroke and motor current to control driving, then driving efficiency can be optimized, but this requires precise measurement and calculation capabilities
Solution Approach 1:
The patent replaces mechanical measurement methods with electronic sensing and digital calculation, using a sensor to detect motor current and a controller to calculate phase difference electronically with high precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient control of cooling capacity and driving efficiency in refrigerators without a cycle matching function, optimizing compressor performance and preventing unnecessary power input, enhancing user convenience and system stability.
Implementation Method 1
a linear motor configured to provide a driving force to move the piston
Data Source
AI summary
Disclosed is a compressor for use with an apparatus having a refrigeration cycle where the compressor includes a piston which reciprocates in a cylinder; a linear motor configured to provide a driving force to move the piston; a sensor configured to sense a motor current of the linear motor; and a compressor controller configured to detect information related to a load of the apparatus, in a separated manner from a controller which controls a body of the apparatus, wherein the compressor controller calculates a phase difference between a stroke of the piston and the sensed motor current, and wherein the compressor controller compares the calculated phase difference with a reference phase difference, and controls a driving of the linear motor in correspondence to the detected load, according to a result of the comparison.