Cooler lock
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Solution Overview
Problem
Refrigerated coolers face challenges in maintaining secure access and preventing spoilage due to temperature fluctuations and power outages, as existing locking mechanisms do not effectively manage door closure and opening based on temperature conditions or provide reliable access control.
Innovation Solution
A motor-controllable latch and strike mechanism integrated with a cooler controller that locks the door when temperature exceeds a threshold, using sensors and a network for remote communication, and includes a manual release for emergency access, ensuring the door remains closed to prevent spoilage and allowing controlled access based on schedules or conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a motor-controllable latch mechanism is used to lock the door during temperature excursions, then food spoilage is prevented, but device complexity increases
Solution Approach 1:
The latch mechanism and strike are integrated into a unified locking system where the latch assembly includes the latch member, spring, and actuator as combined components working together with the strike mounted on the door frame, creating a cohesive temperature-responsive locking system
Solution Approach 2:
The manual locking mechanism is replaced with a motor-controllable actuator that automatically engages and disengages the latch based on temperature sensor input, eliminating the need for manual intervention and providing automated temperature-based access control
2Reliability
If the door is locked during temperature excursions to prevent spoilage, then food safety is maintained, but access control is restricted
Solution Approach 1:
The locking system transitions from a static locked/unlocked state to a dynamic system that automatically adjusts its state based on real-time temperature conditions, allowing the door to be locked when temperature exceeds the threshold and unlocked when temperature is within the safe range
Solution Approach 2:
The temperature sensor continuously monitors the internal temperature and provides feedback to the control system, which automatically adjusts the latch position accordingly, creating a closed-loop system that responds to temperature changes without manual intervention
3Ease of operation
If a manual release mechanism is added for emergency access, then accessibility is improved, but device complexity increases
Solution Approach 1:
The manual release function is extracted as a separate, independent mechanism from the automated latch system, allowing it to be activated independently of the temperature-controlled locking mechanism for emergency access situations
Data Source
AI summary
A cooler access control system locks a cooler when occurrence of an event is detected that requires limiting access to the inside of the cooler. Examples of such events include the loss of power to the cooler for a predetermined period of time, the opening of the cooler door for longer than an allowed time, the loss of functionality of a temperature probe and others. In an embodiment, a service mode is supported wherein the door is left unlocked despite the occurrence of such an event, to allow a stocker or other personnel to leave the cooler door open while stocking the cooler with product.