Redundant Container Cooling With Automatic Primary Unit Switching
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Solution Overview
Problem
Pharmaceuticals and biopharmaceuticals require precise temperature control during storage and shipping to prevent costly temperature variations, which existing cooling systems often fail to maintain effectively, leading to product loss and liability issues.
Innovation Solution
A dual redundant cooling system with two separate cooling units and controllers, where one unit can switch to primary or secondary operation based on functionality, ensuring continuous temperature control and minimizing temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single cooling unit is used, then the device complexity is reduced, but the reliability of temperature control deteriorates
Solution Approach 1:
The cooling system is divided into two independent cooling units (first cooling unit and second cooling unit), each with separate controllers and cooling loops. This segmentation allows one unit to serve as primary and the other as backup, ensuring that if one unit fails, the other can maintain temperature control, thus resolving the contradiction between reliability and complexity by making the system modular and fault-tolerant.
Solution Approach 2:
The system implements a redundant backup cooling unit that remains standby ready to take over if the primary cooling unit fails. The controllers exchange switch signals in advance to establish failover capability, providing beforehand cushioning against potential failures and ensuring continuous temperature control without interruption.
2Reliability
If redundant cooling units are implemented, then the reliability of temperature control is improved, but the device complexity increases
Solution Approach 1:
Both cooling units are designed with identical functionality and capability to operate as primary cooling units. Each unit includes a controller that can independently manage the cooling loop, and both units are capable of performing the same temperature control function. This universality allows seamless failover and reduces the need for complex differentiation between primary and backup units, managing complexity while maintaining reliability.
Solution Approach 2:
The controllers of the two cooling units communicate switch signals to each other, creating a feedback mechanism that monitors the operational status of both units. This feedback system automatically detects failures and triggers appropriate switching actions, ensuring reliable temperature control through automated response to system conditions while managing complexity through intelligent control rather than mechanical complexity.
3Measurement precision
If automatic switching between cooling units is implemented, then the temperature control precision is improved, but the control system complexity increases
Solution Approach 1:
The cooling system implements automatic self-switching capability where the controllers autonomously monitor each other's status and execute failover decisions without external intervention. The controllers exchange switch signals and automatically transition between primary and standby roles based on detected conditions, providing self-service temperature control that maintains precision while minimizing the need for complex external control mechanisms.
Data Source
AI summary
A dual redundant cooling system for a container is provided. The dual redundant cooling system includes a first cooling unit and a second cooling unit. The first cooling unit is positioned in a first cabinet attached to the container. The first cooling unit includes a first controller operating a first cooling loop to cool an interior of the container. The second cooling unit is positioned in a second cabinet attached to the container and adjacent the first cabinet. The second cooling unit includes a second controller operating a second cooling loop to cool the interior of the container. The first cooling unit and the first cooling loop are separate from the second cooling unit and the second cooling loop. The first controller and the second controller communicate a switch signal between each other so that either the first cooling unit is a primary cooling unit operating the first cooling loop or the second cooling unit is the primary cooling unit operating the second cooling loop. The switch signal switching the primary cooling unit.