Open-Fronted Cabinet Chassis for Multi-Temperature Food Display
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Solution Overview
Problem
Existing food storage cabinets lack the ability to maintain separate temperature zones within a single unit, as they either operate at a uniform temperature or struggle to integrate refrigerated and heated areas due to heat loss through conduction, radiation, or convection, making it difficult to display and vend foodstuffs efficiently.
Innovation Solution
An open-fronted cabinet with a structural sandwich composite chassis providing thermal insulation, featuring a removable temperature-altering cassette and a heated or cooled floor, allowing independent temperature control of different interior zones, including the use of expanded polymer and metal layers for insulation and a vapour compression refrigeration circuit or Peltier device for temperature management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single temperature regime is applied throughout the entire cabinet interior, then the cabinet structure remains simple and uniform, but the ability to maintain separate temperature zones for different foodstuffs is lost
Solution Approach 1:
The cabinet interior is divided into multiple temperature zones using horizontal partitions that create separate compartments. Each partition includes thermal insulation layers and can be equipped with independent heating or cooling mechanisms, allowing different temperature regimes in different sections while maintaining overall structural integrity.
Solution Approach 2:
Different regions of the cabinet interior are assigned different thermal properties through the use of insulated partitions and localized heating/cooling elements. This allows each zone to have tailored temperature characteristics suitable for specific food storage requirements without affecting other zones.
2Adaptability or versatility
If shelves are made discreet and independently heated, then local temperature control is improved, but heat loss through conduction and convection increases, affecting surrounding shelves
Solution Approach 1:
Thermal insulation layers are introduced as intermediary materials between independently heated shelves and the surrounding cabinet environment. These insulation layers act as mediators that allow localized heating of individual shelves while minimizing heat transfer to adjacent areas, thereby reducing energy loss and preventing unwanted temperature changes in surrounding regions.
3Adaptability or versatility
If refrigerated and heated areas are integrated in the same cabinet, then space utilization is improved, but heat loss through conduction, radiation and convection makes separation very difficult
Solution Approach 1:
The cabinet is segmented into distinct refrigerated and heated sections using thick thermal insulation barriers and partition walls. These partitions create physical and thermal separation between cold and hot zones, allowing both temperature regimes to coexist in the same cabinet structure while minimizing heat transfer between zones through the use of insulating materials and air gaps.
Solution Approach 2:
Thermal insulation materials and air gaps serve as intermediary layers between refrigerated and heated areas. These intermediaries reduce conductive, radiative, and convective heat transfer between the opposing temperature zones, enabling efficient multi-temperature operation within a single cabinet enclosure.
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
Enables precise temperature management of multiple zones within a single cabinet, maintaining desired temperatures and preventing external temperature extremes, thus enhancing food storage and display capabilities while allowing for independent operation of shelves.
Implementation Method 1
the base, rear and top panels are each formed from a structural sandwich composite material having thermal insulation properties
Implementation Method 2
The heating mechanism may include an electric heating element and a fan
Implementation Method 3
The heating mechanism may include an electric heating element and a fan
Implementation Method 4
The cooling mechanism may include a vapour compression refrigeration circuit and a fan
Implementation Method 5
Alternatively the cooling mechanism may include a Peltier device with or without a fan
Data Source
AI summary
The present invention relates to an open fronted food storage cabinet (10). The cabinet (10) has a top (16), rear (14), base (12) and opposed sides (18,20). The top, rear, base and opposing sides (12,14,16,18,20) define an interior space (22) of the cabinet (10) which is accessible through an opening (24) to the front of the cabinet (10). The opening (24) is defined between edges of the top (16), base (12) and opposing sides (18,20) of the cabinet (10). The cabinet (10) includes an interior chassis structure (26) comprised of a base panel (12a), a rear panel (14a) and a top panel (16a) which are mechanically connected to one another. The base, rear and top panels (12a,14a,16a) are each formed from a structural sandwich composite material (28) having thermal insulation properties. The rear panel (14a) includes an aperture (38) to which a mechanism (40) operable to alter the temperature within interior space (22) of the cabinet (10) is mounted.