Modular vending system for propane cylinders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vending systems for dispensing propane tanks and other hazardous items in Class I Division 2 locations are inefficient, requiring manual assistance and frequent store visits, and lack modular expansion capabilities, leading to operational failures and reduced sales efficiency.
Innovation Solution
A modular outdoor vending system that allows for the dispensing of propane tanks and other items in hazardous locations, featuring a master unit that integrates additional modules, electronic locking, and DC power with solar charging, enabling autonomous operation and real-time sales data reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If propane tanks are stored in locked metal cages outside the store to deter theft, then security is improved, but customer accessibility and sales efficiency deteriorate due to requiring manual unlocking and store personnel assistance
Solution Approach 1:
The system divides the storage and dispensing function into separate modular components: secure locked cages for storage and automated vending machines for dispensing. The cage remains securely locked for theft prevention, while the vending machine handles customer transactions and automated release, eliminating the need for manual intervention and improving sales efficiency.
Solution Approach 2:
The vending machine enables customers to autonomously complete the purchase process by selecting products, making payments, and receiving items without store personnel assistance. The system automatically manages cage locking, transaction processing, and product dispensing, transforming a manual security process into an automated self-service system that maintains security while improving productivity.
2Ease of operation
If store personnel manually unlock cages and remove tanks for customers, then customer service is provided, but time consumption and operational inefficiency increase
Solution Approach 1:
The vending machine completely automates the customer service process for propane tank dispensing. Customers independently interact with the machine interface, complete transactions, and receive products without requiring store personnel to locate keys, unlock cages, or physically retrieve tanks. This eliminates time consumption for both customers and employees while maintaining high-quality service.
Solution Approach 2:
The manual mechanical process of key-based cage unlocking and physical tank retrieval is replaced with an automated electromechanical vending system. The system uses electronic controls, automated locking mechanisms, and programmable logic to manage the dispensing process, eliminating the time-consuming manual operations while improving ease of operation.
3Reliability
If the store is closed and products are locked in cages, then security is maintained, but accessibility and profitability during extended hours are reduced
Solution Approach 1:
The vending machine operates autonomously during store closed hours, allowing customers to access propane tanks outside traditional business hours. The system maintains security through automated cage locking while enabling 24/7 accessibility and transactions, significantly improving adaptability to extended customer needs without compromising security.
Solution Approach 2:
The system dynamically adapts its operation mode based on store hours and customer demand. During closed hours, the vending machine remains fully operational for autonomous transactions, while the cage security system automatically adjusts locking states. This dynamic behavior enables the system to provide both security and extended accessibility without manual intervention.
4Reliability
If existing vending systems are used in Class I Division 2 hazardous locations, then hazardous location compliance is achieved, but system complexity increases due to sealed compartments and restricted electrical connections
Solution Approach 1:
The system separates hazardous and non-hazardous components into distinct sealed modules. Electrical actuators and control systems requiring hazardous location certification are enclosed in sealed compartments, while unsealed components remain outside. This segmentation maintains hazardous location compliance for critical components while reducing overall system complexity by allowing non-compliant components to operate without sealing restrictions.
Solution Approach 2:
The sealed compartment acts as an intermediary barrier between the hazardous location environment and the electrical components. By confining potentially igniting components within certified sealed enclosures, the system mediates between the need for complex hazardous location compliance and the desire for simpler unsealed component design, allowing complexity to be localized rather than system-wide.
5Adaptability or versatility
If modular add-on modules are connected to the master module, then system expansion and scalability are improved, but electrical connection complexity increases without proper integration methods
Solution Approach 1:
The master module and add-on modules utilize universal standardized connection interfaces for both mechanical attachment and electrical integration. The same connector serves multiple functions: structural support, power transmission, data communication, and signaling. This multi-functionality enables system expansion while minimizing electrical connection complexity, as a single universal interface replaces what would otherwise require multiple separate connection systems.
Solution Approach 2:
The system merges mechanical coupling and electrical connection into a single integrated operation. When add-on modules are mechanically attached to the master module, the electrical connections are simultaneously established through the integrated connector. This merging eliminates the need for separate electrical wiring steps, reducing integration complexity while maintaining full expandability.
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
The system provides a convenient, secure, and reliable way to sell propane tanks and other items 24/7 without store personnel assistance, reducing downtime and re-stocking time, while allowing for scalable expansion and efficient inventory management.
Implementation Method 1
The system can also be operated using solar power
Implementation Method 2
The system is DC (Direct Current) powered and continuously recharged using either AC (Alternate Current) power or solar power
Data Source
AI summary
A outdoor large item vending system for large items such as propane tanks, liquid petroleum gas cylinders of various sizes and other items that must be stored in and dispensed from a hazardous location compliant system (i.e. a Class I, Division 2 compliant system). The vending system can be placed on a store front, parking lot, campsite, or park, and comprises a main housing having compartments to hold large items such as propane container, which are dispensed from the compartments when a payment is made through a credit card reader interface located in the main housing. The large item vending system of the invention is powered by AC current which is turned to DC power by a power supply, or DC batteries charged by AC power and/or solar power, or by other power means.