Dual Redundant Refrigeration Unit for Container Temperature Backup
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Solution Overview
Problem
Temperature fluctuations in the cold chain can lead to significant financial losses and product waste for temperature-sensitive goods like pharmaceuticals, as existing systems lack redundancy and fail to maintain consistent temperature control during storage and shipping.
Innovation Solution
A dual redundant refrigerant system with two identical cooling units and a system interface box that powers and controls each unit independently, ensuring continuous temperature regulation by switching between primary and secondary units to maintain set point temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single cooling unit is used in the refrigeration system, then the device complexity is reduced, but the reliability of temperature control deteriorates due to lack of redundancy
Solution Approach 1:
The refrigeration system is divided into multiple independent cooling units (first cooling unit and second cooling unit), each capable of independently providing cooling function. This segmentation allows the system to maintain reliability through redundancy while keeping each individual unit relatively simple in structure.
Solution Approach 2:
The system incorporates a standby cooling unit that serves as a pre-prepared backup. When the primary cooling unit fails or requires maintenance, the standby unit can immediately take over, providing beforehand cushioning against temperature control failures and ensuring continuous reliable operation.
2Reliability
If redundant cooling units are implemented, then the reliability of temperature control is improved, but the device complexity increases due to additional components and control mechanisms
Solution Approach 1:
The control system automatically monitors the operational status of cooling units and performs switchover operations without requiring manual intervention. The system self-manages the redundancy by detecting failures and activating backup units, thereby improving reliability while minimizing the complexity of manual control procedures.
Solution Approach 2:
Multiple cooling units are integrated into a single coordinated system through a unified control interface. The control system combines the functionality of multiple units and manages their operation as a cohesive whole, reducing the perceived complexity by providing centralized control rather than separate independent control systems.
3Loss of substance
If a single cooling unit is used, then the manufacturing cost is reduced, but the loss of substance increases due to temperature fluctuations causing product degradation
Solution Approach 1:
The standby cooling unit serves as a pre-prepared safeguard that prevents temperature excursions that could lead to product degradation. By having backup capacity available beforehand, the system ensures continuous temperature control and prevents product loss without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The control system continuously monitors temperature conditions and the operational status of cooling units, providing feedback that triggers automatic switchover when needed. This feedback mechanism ensures product protection by maintaining temperature control while using a relatively simple add-on control system rather than complex predictive control.
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
The system maintains consistent temperature control by avoiding malfunctioning units and minimizing temperature variations, thereby reducing product loss and associated costs.
Implementation Method 1
picture frame refrigerant system
Implementation Method 2
refrigeration unit having a body secured to an open end of a known shipping container
Data Source
AI summary
A picture frame refrigerant system for a known shipping container is provided. The picture frame refrigerant system includes a refrigeration unit having a body secured to an open end of a known shipping container, a first cooling unit, a second cooling unit, and a system interface box connected to the first cooling unit and second cooling unit and adapted to power on or power off the first cooling unit and the second cooling unit in a redundant manner.