Inverter Linear Compressor Stroke Control for Dual-Compartment Cooling
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Solution Overview
Problem
Existing refrigerators with inverter linear compressors lack efficient temperature control mechanisms, leading to inefficient energy usage and varying refrigeration performance across different compartments.
Innovation Solution
A refrigerator system incorporating an inverter circuit, sensor unit, and controller that adjusts the stroke of the inverter linear compressor based on temperature readings from both the freezer and refrigerator compartments, optimizing the compressor's output to match specific temperature thresholds, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor operates at maximum output continuously, then the refrigeration performance is maintained, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the compressor stroke variable rather than fixed. The controller dynamically adjusts the compressor stroke length based on real-time temperature feedback from both the refrigerator compartment and freezer compartment, allowing the system to operate at optimal output levels rather than constant maximum output, thereby reducing power consumption while maintaining required refrigeration performance.
Solution Approach 2:
The patent changes the operational parameters of the compressor by varying the stroke length. The controller receives temperature information from both compartments and adjusts the compressor stroke parameter accordingly - extending the stroke when cooling is needed and reducing it when temperature thresholds are met, thus optimizing energy usage while maintaining refrigeration effectiveness.
2Measurement precision
If the compressor stroke is varied frequently, then the temperature control precision is improved, but the system stability deteriorates
Solution Approach 1:
The patent applies periodic action through the one-period interval stroke variation mechanism. The controller varies the compressor stroke over a defined time period based on temperature conditions, allowing the system to achieve precise temperature control through rhythmic adjustment rather than continuous or erratic changes. This periodic variation maintains system stability while still achieving the desired temperature precision in both compartments.
3Stability of the object's composition
If separate temperature control is implemented for each compartment, then the temperature distribution uniformity is improved, but the control system complexity increases
Solution Approach 1:
The patent applies universality by designing a single controller that performs multiple functions: it monitors temperatures from both the refrigerator compartment and freezer compartment, processes this information collectively, and controls the compressor stroke accordingly. This multi-functional approach achieves uniform temperature distribution across both compartments without requiring separate control systems for each compartment, thereby avoiding excessive complexity.
Solution Approach 2:
The patent merges the temperature control functions for both compartments into a unified control system. The controller integrates temperature information from both the refrigerator and freezer compartments and makes coordinated stroke adjustment decisions, combining what could have been separate control loops into a single integrated system that achieves dual-compartment temperature uniformity with reduced overall complexity.
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
This solution allows for precise control of the compressor's output, optimizing energy usage and maintaining desired refrigeration levels, resulting in reduced power consumption and improved efficiency.
Implementation Method 1
a piston is directly connected to a reciprocating motor that linearly reciprocates to improve compression efficiency
Implementation Method 2
an evaporator, a fan for forcing air to flow along a flow line from the rear surface of the front door toward the front surface of the front door
Implementation Method 3
a condenser, a expansion valve, a defrosting water flow generator
Data Source
AI summary
There are provided a refrigerator and a method of controlling the same. The method of controlling a refrigerator includes varying stroke of an inverter linear compressor to operate the inverter linear compressor by a maximum output when a temperature of an inside of a freezer compartment or a refrigerator compartment is higher than a maximum output temperature and varying the stroke of the inverter linear compressor at one period interval to operate the inverter linear compressor when the temperature of the inside of the freezer compartment or the refrigerator compartment is no more than the maximum output temperature.