Refrigerator Cooling Control for Balanced Dual-Compartment Temperatures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In refrigerators with independent cooling compartments, maintaining optimal temperature in one compartment while another is cooled can lead to inefficient operation due to uneven refrigerant distribution, resulting in temperature fluctuations and reduced efficiency.
Innovation Solution
A system with multiple compressors and evaporators, including a flow adjustment unit that controls refrigerant flow between evaporators based on temperature sensors and indoor conditions, allowing for selective or simultaneous cooling operations to maintain temperature ranges in both compartments efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If selective cooling of storage compartments is performed using a refrigerant supply unit, then one storage compartment can be cooled while another is stopped, but the stopped storage compartment may increase in temperature and go out of the normal temperature range
Solution Approach 1:
The control unit determines whether a storage compartment is approaching the out-of-range temperature threshold before it actually goes out of range. When the temperature approaches the threshold, the control unit proactively switches from selective cooling to simultaneous cooling of multiple compartments, preventing the temperature from exceeding the normal range in the first place
Solution Approach 2:
The system continuously monitors the temperature of each storage compartment and uses this feedback to dynamically adjust the cooling operation mode. When temperature sensors detect that a compartment is approaching the out-of-range threshold, the control unit responds by changing the refrigerant supply configuration to maintain proper temperature, creating a closed-loop control system
2Reliability
If both outlet sides of the refrigerant supply unit are opened to cool multiple storage compartments simultaneously, then all compartments can be cooled, but the refrigerant may concentrate into one evaporator making it difficult to maintain physical equilibrium
Solution Approach 1:
The system dynamically adjusts the refrigerant supply configuration based on real-time temperature conditions. Instead of using a fixed three-way valve position, the control unit can switch between different operational modes (selective cooling of one compartment, simultaneous cooling of multiple compartments, or sequential cooling), allowing the system to adapt to varying thermal loads and maintain refrigerant distribution equilibrium
Solution Approach 2:
The control unit changes the operational parameters of the refrigerant supply unit by switching between different valve positions and cooling modes. When simultaneous cooling is required, the system adjusts the refrigerant flow distribution to ensure balanced supply to multiple evaporators, preventing refrigerant concentration in a single evaporator and maintaining physical equilibrium
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 approach ensures that both compartments are maintained within desired temperature ranges, improving operational efficiency and reducing power consumption by optimizing refrigerant distribution and compressor modes based on temperature and load conditions.
Implementation Method 1
Cool air stored in the refrigerating compartment may be cooled while passing through the first evaporator
Data Source
AI summary
A refrigerator and a method for controlling a refrigerator, including a plurality of compressors and a plurality of evaporators disposed on inlet-sides of the plurality of compressors to supply cool air to a refrigerating compartment and a freezing compartment includes determining whether a temperature of the refrigerating compartment belongs to a refrigerating compartment satisfaction range, determining an indoor temperature when the temperature of the refrigerating compartment does not belong to the refrigerating compartment satisfaction range, and determining whether a load corresponding operation condition is satisfied when the determined indoor temperature belongs to a set range. When the load corresponding operation condition is satisfied, a simultaneous operation of the refrigerating compartment and the freezing compartment is performed, and when the load corresponding operation condition is not satisfied, a cooling operation of the refrigerating compartment is performed.