Multi-Zone Refrigerated Vending Cabinet With Thermal Breaks
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Solution Overview
Problem
Conventional vending machines require multiple units to maintain different refrigeration temperatures for perishable items, leading to increased costs, space inefficiency, and complexity, as they struggle to effectively manage temperature zones within a single machine.
Innovation Solution
A vending machine design that utilizes a single refrigeration unit with thermal breaks, air ducts, and insulated dividers to create multiple temperature zones, allowing for efficient configuration into one, two, or three zones using controlled conduction and air circulation, enabling the storage and vending of frozen, refrigerated, and ambient items from a single machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple separate vending machines are used to maintain different refrigeration temperatures, then temperature control for different perishable items is improved, but cost and device complexity increase
Solution Approach 1:
The patent combines multiple temperature zones (frozen, refrigerated, and ambient) into a single vending machine, integrating functions that previously required separate machines. This reduces the total number of machines needed while maintaining distinct temperature control for different product types.
Solution Approach 2:
The internal space of the vending machine is segmented into multiple temperature zones using insulated dividers and thermal barriers. Each zone is independently controlled to maintain different temperature ranges, allowing frozen, refrigerated, and ambient items to coexist in one machine.
2Temperature
If multiple separate vending machines are used for different temperature zones, then temperature requirements for different products are met, but floor space consumption increases
Solution Approach 1:
By merging frozen, refrigerated, and ambient storage zones into a single machine footprint, the patent significantly reduces the floor space required compared to using separate machines for each temperature zone.
Solution Approach 2:
The patent utilizes vertical space within the machine by stacking temperature zones vertically (frozen at bottom, refrigerated in middle, ambient at top), efficiently using the third dimension to accommodate multiple temperature zones without increasing horizontal footprint.
3Device complexity
If a single refrigeration unit is used for multiple temperature zones, then cost and space efficiency are improved, but temperature control precision deteriorates
Solution Approach 1:
The refrigeration system is segmented into multiple independent temperature zones, each with its own thermostat and control mechanism. This allows precise temperature control in each zone (frozen, refrigerated, ambient) while using a single refrigeration unit, maintaining accuracy through zoned control.
Solution Approach 2:
Insulated dividers and thermal barriers act as intermediaries between temperature zones, preventing heat transfer and temperature mixing. These thermal barriers maintain precise temperature boundaries, ensuring each zone stays within its required temperature range despite using a single refrigeration source.
4Temperature
If interior space is used for insulation and equipment for multiple temperature zones, then temperature control is improved, but space for vendible products decreases
Solution Approach 1:
The patent uses thin insulated dividers and thermal barriers that provide effective temperature zone separation with minimal thickness. These thin film-like insulation elements maintain temperature zones while occupying minimal space, maximizing the volume available for product storage.
Solution Approach 2:
By arranging temperature zones vertically and using thin horizontal dividers, the patent minimizes the volume consumed by insulation and equipment. The vertical stacking approach allows maximum horizontal space to be dedicated to product storage while maintaining distinct temperature zones.
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 design allows for efficient and economical use of space by maintaining precise temperature zones within a single machine, reducing the need for multiple units and enabling a wider variety of products to be offered, while adhering to regulatory standards.
Implementation Method 1
An inner liner material is manufactured to include a thermal break between zones in the space to deter thermal conduction through the liner between zones
Implementation Method 2
A conventional refrigeration unit comprises a condensing unit, evaporator, and fan to remove heat from inside the refrigerated space and circulate cooled air inside it
Implementation Method 3
A channel or duct can be installed vertically in or along the space. The channel or duct can provides a continuous air path from at or near an evaporator of a refrigeration unit at the bottom of the cabinet to an opening in the duct at the top of the cabinet
Implementation Method 4
A fan can be utilized to move air from at the evaporator to a first temperature zone
Implementation Method 5
A sheet or other air flow diverter can be placed appropriately within the space to direct movement of air conducive to maintaining the temperature in each zone
Data Source
AI summary
An automated vending machine that can be selectively configured to include one or several temperature zones. A single refrigeration system and universal interior allows easy and economical assembly into a one, two, or three temperature zone machine. Thermal breaks and dividers are used to partition zones, when needed. The basic vending machine cabinet, dispensers, and controls are not changed between configurations. In one aspect, a universal air duct can be used for all three configurations, with minor changes.