Portable Ice Chest Cooling Unit
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Solution Overview
Problem
Current portable coolers suffer from temperature gradients and require direct contact between perishable goods and ice, leading to spoilage and cross-contamination issues.
Innovation Solution
A portable cooling unit with a housing, heat exchanger, fan, and electronic control unit that maintains consistent temperature and separates ice from food using a cooling circuit and airflow system, controlled by sensors and a power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If passive cooling with ice is used, then cooling capability is provided, but temperature gradient between top and bottom occurs
Solution Approach 1:
The cooling system is segmented into multiple independent components: ice compartment, heat exchanger, fan, and control unit. This segmentation allows each component to perform its specific function optimally while working together to achieve uniform temperature distribution throughout the cooler.
Solution Approach 2:
A heat exchanger acts as an intermediary between the ice and the air in the cooler. Instead of direct contact between ice and food items, the heat exchanger transfers cooling from the ice to the air, which then circulates uniformly throughout the cooler, eliminating temperature gradients.
2Reliability
If direct contact with ice is used, then cooling efficiency is improved, but moisture transfer and cross contamination occur
Solution Approach 1:
The heat exchanger serves as a mediator that transfers cooling energy without allowing direct contact between ice and food items. This eliminates moisture transfer and cross-contamination risks while maintaining effective cooling and food preservation quality.
Solution Approach 2:
The system replaces direct mechanical contact cooling (ice touching food) with a fluid-based cooling system where cooled air circulates around food items. This substitution maintains cooling efficiency while eliminating the harmful effects of direct ice contact.
3Temperature
If active cooling system is added, then temperature uniformity is improved, but device complexity increases
Solution Approach 1:
The active cooling system is divided into separate functional modules (ice compartment, heat exchanger, fan, control unit) that can be independently optimized and maintained. This segmentation manages complexity by making each component simple while the integrated system achieves temperature uniformity.
Solution Approach 2:
The system uses an electronic control unit with sensors to monitor and adjust cooling parameters (fan speed, heat exchanger operation) in real-time. This dynamic parameter adjustment maintains temperature uniformity while managing system complexity through intelligent control rather than overly complex mechanical 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
Maintains uniform cooling without moisture transfer, preserving perishable goods and preventing contamination, suitable for use in conventional coolers without direct ice contact.
Implementation Method 1
a heat exchanger; a fan positioned to generate an airflow through the heat exchanger
Implementation Method 2
a fan positioned to generate an airflow through the heat exchanger
Implementation Method 3
the heat exchanger is a heat sink that is coupled to the housing and positioned to be in thermal communication with the cooling medium held in the compartment
Data Source
AI summary
Provided herein are specifications for a cooling unit for the portable cooling of perishable goods comprising: a housing at least partially defining a compartment for holding a cooling medium; a heat exchanger; a fan positioned to generate an airflow through the heat exchanger; and an electronic control unit operable to control the fan. In some embodiments, the heat exchanger is a radiator, and the cooling unit further comprises: a cooling circuit coupled to the housing, the cooling circuit comprising an inlet in fluid communication with the compartment, a pump, an outlet in fluid communication with the compartment, the radiator and a fluid line connecting the inlet, the pump, the outlet, and the radiator; wherein the electronic control unit is further operable to control the pump and circulate cooling medium through the cooling circuit.