Refrigerator Meat Aging Control With Cyclic Temperature Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing refrigeration technologies fail to effectively manage the aging and storage of meat, leading to either over-aging and quality deterioration or under-aging, due to inadequate temperature control and lack of a method to repeatedly alternate between aging and cooling temperatures.
Innovation Solution
A refrigerator with a variable temperature storage chamber that alternates between an aging temperature of 1°C to 5°C and a cooling temperature of -3°C to -1°C for a preset period, allowing for repeated cycles of aging and cooling, followed by storage at a constant temperature of -2°C to 0°C after the aging period is complete, controlled by a user-inputted meat aging mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If meat is kept at a predetermined temperature for aging, then meat tenderness is improved through self-digestion, but excessively long aging causes quality deterioration due to microbial propagation and fat acidification
Solution Approach 1:
The refrigerator implements periodic temperature cycling between aging temperature (1°C to 5°C) and cooling temperature (-3°C to -1°C) modes. This periodic action allows the meat to undergo aging processes during the warmer phase while preventing microbial overgrowth and quality deterioration during the cooling phase, thereby resolving the contradiction between achieving tenderness and maintaining quality reliability.
Solution Approach 2:
The system dynamically adjusts the storage chamber temperature between two distinct states (aging and cooling modes) based on predetermined cycles. This dynamic temperature control enables the meat to experience alternating conditions that promote tenderness development while periodically resetting to prevent excessive aging effects, thus balancing tenderness improvement with quality preservation.
2Strength
If meat is aged for a longer period to achieve maximum tenderness, then meat quality improves, but the risk of microbial propagation and fat acidification increases
Solution Approach 1:
The refrigerator employs periodic temperature cycling that alternates between aging mode (1°C to 5°C) which promotes tenderness through controlled self-digestion, and cooling mode (-3°C to -1°C) which suppresses microbial propagation. This periodic action extends the effective aging period while periodically interrupting microbial growth, thereby achieving maximum tenderness without excessive microbial contamination.
Solution Approach 2:
The system utilizes the cooling phase not merely as a pause but as an active countermeasure that converts the potential harm of continuous warming (microbial growth) into a beneficial reset. The periodic cooling intervals suppress microbial propagation and slow down excessive enzymatic activity, transforming what would be a harmful continuous aging process into a controlled, beneficial periodic treatment that enhances tenderness while preventing quality deterioration.
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 method ensures the meat is aged to the desired tenderness and freshness while preventing freezing and microbial growth, resulting in high-quality, tender meat with optimal storage conditions.
Implementation Method 1
The temperature of the storage chamber may be repeatedly controlled to the aging temperature and the cooling temperature for a preset meat aging period
Implementation Method 2
the cooling temperature may be in a range of about -3°C to about -1°C
Implementation Method 3
storing the completely aged meat at a preset storage temperature of the storage chamber after the meat aging period passes
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In a control method of a refrigerator having a storage chamber for aging of meat, an operation to keep the storage chamber at an aging temperature and an operation to cool the storage chamber to a cooling temperature lower than the aging temperature are repeated. This enables optimal aging of meat via an aging time and aging temperature suitable for meat.