Automated blast cell loading and unloading
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Solution Overview
Problem
Blast freezing systems face challenges in automation due to extreme cold temperatures, leading to ice buildup and operational hindrances, resulting in manual loading and unloading of pallets, increased warehouse footprint, and reduced throughput.
Innovation Solution
The implementation of automated blast cell systems with side-loading doors, air flow guides, and control algorithms enables reliable automated loading and unloading, reduces the required warehouse space, and optimizes pallet throughput by using autonomous cranes and robots, while minimizing turbulence and ensuring consistent cooling across multiple levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated loading and unloading systems are implemented in blast cells, then productivity and throughput are improved, but the system becomes vulnerable to ice buildup and operational failures due to extreme cold temperatures
Solution Approach 1:
The blast cell is divided into multiple independent zones with separate air circulation systems. Each zone has its own fan and channel configuration, allowing automated equipment to operate in warmer transition zones while extreme cold is contained in freezing zones. This segmentation enables automation to function reliably without exposure to uniform extreme cold throughout the entire cell.
Solution Approach 2:
Heated air channels and insulation barriers are introduced as intermediary elements between the automated loading equipment and the extreme cold environment. These intermediaries create thermal buffers that prevent ice buildup on automated components while maintaining the required freezing conditions in the pallet storage areas.
2Reliability
If manual loading and unloading with forklifts is used, then automation reliability issues are avoided, but the required warehouse footprint increases and operational efficiency decreases
Solution Approach 1:
The system transitions from horizontal forklift movement requiring large aisles to vertical pallet movement using overhead cranes and automated robotic systems. Pallets are loaded from the top or sides of blast cells, eliminating the need for large maneuvering spaces and reducing the overall warehouse footprint while maintaining operational reliability through controlled access points.
Solution Approach 2:
Traditional mechanical forklift systems are replaced with automated robotic manipulators and overhead crane systems that can operate in confined spaces. These systems use precision control algorithms and sensor feedback to reliably load and unload pallets without requiring the large operational envelopes needed by manual forklifts.
3Manufacturing precision
If extended blast freezing cycles are used to ensure thorough cooling, then cooling effectiveness is improved, but the time required for each pallet increases production bottlenecks
Solution Approach 1:
The air circulation system operates in periodic cycles with alternating fan speeds and directional changes. Fans alternate between high-speed forced convection phases for rapid heat removal and lower-speed circulation phases for uniform temperature distribution. This periodic action achieves thorough cooling without requiring continuously extended cycle times.
Solution Approach 2:
The blast cell system dynamically adjusts fan speeds, air flow directions, and channel configurations based on real-time temperature sensor feedback. This dynamic control optimizes the balance between cooling effectiveness and cycle time, adapting the air circulation pattern to the specific thermal state of pallets to achieve uniform cooling more quickly than static systems.
4Device complexity
If simple air circulation without flow guides is used, then device complexity is reduced, but air flow turbulence increases and cooling consistency decreases
Solution Approach 1:
Air flow guides and channel configurations are selectively implemented in specific locations where turbulence problems occur, rather than throughout the entire system. Localized flow control elements are placed at channel entrances, corners, and transition zones to manage air flow patterns only where needed, maintaining simplicity in other areas while achieving consistent cooling.
Solution Approach 2:
The air circulation system is segmented into multiple independent channels with individual flow control. Rather than one large uncontrolled air space, the cell is divided into zones with dedicated air pathways, allowing each zone to maintain consistent cooling independently. This segmentation provides cooling consistency without requiring complex overall system design.
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 enhances safety and efficiency by automating the blast freezing process, allowing simultaneous loading and unloading, reducing the blast freezing cycle time, and improving the overall throughput and consistency of the cooling process.
Implementation Method 1
a fan configured to circulate air through the closed-loop provided by the bay space in the housing
Implementation Method 2
a cooling system (e.g., cooling coils, such as evaporators) that effectively transfers heat picked up from the pallets out of the enclosure
Data Source
AI summary
A system for blast-freezing items includes a plurality of cells arranged side-by-side, each cell including a housing with a bay space, a plenum, a front air passage, a rear air passage, and a fan. The fan is positioned in the plenum and configured to circulate air through the bay space. Each cell also includes a plurality of channels to separate pathways of air to segments of the bay space. The system also includes a plurality of crane rails extending between rows of cells and at least one crane capable of traveling along the plurality of crane rails to load or unload each of the plurality of cells.