Open-Air Food Display Barrier for Automatic Temperature Lockout
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Solution Overview
Problem
Open-air temperature-controlled display cases lack an automated mechanism to restrict access when temperatures or conditions become unacceptable, posing a risk of food spoilage and potential foodborne illnesses, as they do not have a mechanism to automatically close or restrict access when conditions reach harmful levels.
Innovation Solution
An automated barrier system is triggered when undesirable conditions are detected, using sensors to monitor temperature and other conditions within the display case, activating a barrier to prevent access when conditions exceed predetermined thresholds, with a processing unit controlling the barrier system and locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an open-air display case is used to allow easy access to food products, then customer convenience and accessibility are improved, but the risk of food spoilage and contamination increases when temperature control fails
Solution Approach 1:
The system applies preliminary anti-action by proactively closing the barrier before food spoilage or contamination can occur. Temperature sensors continuously monitor the interior environment, and when unacceptable conditions are detected, the barrier automatically closes to prevent harmful effects from developing further, thereby protecting food safety while maintaining ease of access during normal operation
Solution Approach 2:
The system implements feedback through temperature sensors that continuously monitor the interior environment and provide data to the control system. When the temperature exceeds predetermined thresholds, the feedback loop triggers the barrier closing mechanism, creating a closed-loop control system that automatically responds to temperature changes and maintains food safety without requiring manual intervention
2Reliability
If manual monitoring of food temperature is implemented, then food safety can be maintained, but labor requirements and operational complexity increase
Solution Approach 1:
The system applies self-service by enabling the display case to automatically monitor its own temperature conditions and trigger barrier closure without external intervention. The integrated sensors and control system allow the unit to self-diagnose temperature issues and self-correct by closing the barrier, eliminating the need for manual monitoring while maintaining food safety
Solution Approach 2:
The system replaces manual mechanical monitoring with an automated electronic control system. Temperature sensors and electronic controllers substitute for human operators, automatically detecting temperature changes and activating the barrier mechanism, thereby reducing labor requirements while maintaining or improving food safety reliability
3Reliability
If an automated barrier system is added to prevent food spoilage, then food safety is improved, but device complexity and cost increase
Solution Approach 1:
The system applies segmentation by dividing the display case into distinct functional zones: the open display area for customer access and the closed storage area activated by the barrier. The barrier itself is segmented into multiple panels that can be independently controlled, allowing the system to close only the necessary portions while maintaining simplicity in the overall structure and reducing the complexity burden of the automated safety feature
Data Source
AI summary
The present invention includes various types of open-air display cases for displaying, storing, and/or vending food, beverages, or other products having a movable barrier that can be automatically positioned over an open front or side of such a unit to prevent access to the products therein when temperatures or other conditions reach unacceptable levels, and methods of using such units. Embodiments of such units may include a temperature-controlled compartment having an open front or side for displaying items, an automatic barrier system that includes a barrier for covering the open portion, a motor engaged with the barrier for closing or opening the barrier, at least one sensor for measuring at least one internal condition (e.g., temperature) of the temperature-controlled compartment, and a processing unit in electronic communication with the sensor and the motor, in which the processing unit may receive data from the sensor, compare the data to a pre-determined range of acceptable values, and activate the motor to close the barrier when the data is inconsistent with the pre-determined range of acceptable values.