Temperature Control Device With Segmented Thermal Zones
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Solution Overview
Problem
Existing temperature control devices face challenges in achieving fast bidirectional control of temperatures at multiple sites of a medium, as they often require high thermal resistance for heating and low thermal resistance for cooling, limiting the range of temperatures that can be effectively controlled.
Innovation Solution
A temperature control device comprising active thermal sites with variable heating elements and passive thermal regions with lower thermal resistance in the direction perpendicular to the substrate, allowing for efficient heating and cooling by utilizing a thermal conduction layer for passive cooling, thereby reducing heat loss to the substrate and enabling a wider temperature range control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If high thermal resistance is used between heating element and substrate, then heating efficiency is improved, but cooling capability deteriorates
Solution Approach 1:
The device segments the substrate into multiple independent thermal zones, each with its own heating element and thermal insulation configuration. This allows different regions to have different thermal characteristics - some optimized for heating with high thermal resistance, others for cooling with low thermal resistance, thereby resolving the contradiction between heating efficiency and cooling capability.
Solution Approach 2:
Different regions of the substrate are assigned different thermal insulation properties. Active thermal sites use insulation layers with higher thermal resistance for efficient heating, while passive thermal regions use layers with lower thermal resistance for effective cooling. This local differentiation allows each zone to optimize its primary function without compromising the other.
2Adaptability or versatility
If low thermal resistance is used between heating element and substrate, then cooling capability is improved, but heating efficiency deteriorates
Solution Approach 1:
The substrate is divided into distinct thermal zones with independent insulation configurations. Passive thermal regions are specifically designed with lower thermal resistance to maximize cooling capability, while this design choice is localized so that it does not compromise heating efficiency in active thermal sites.
Solution Approach 2:
Thermal insulation layers are configured with different resistance values in different regions. Passive thermal regions use lower thermal resistance materials or thinner layers to enhance cooling, while active thermal sites use higher thermal resistance for heating efficiency. This localized quality differentiation resolves the contradiction.
3Adaptability or versatility
If bidirectional temperature control is implemented at each site, then temperature range is improved, but device complexity increases
Solution Approach 1:
The device segments temperature control functions across multiple independent thermal zones rather than requiring each site to perform all functions. Active thermal sites handle heating and some cooling, while passive thermal regions handle cooling, collectively providing bidirectional temperature control across the device without requiring complex bidirectional control at every individual site.
Solution Approach 2:
The substrate and thermal insulation layers serve multiple functions simultaneously - they provide structural support, thermal insulation for heating, and thermal conduction for cooling. This multi-functionality reduces device complexity by eliminating the need for separate dedicated heating and cooling systems at each site.
4Loss of energy
If thermal insulation layer has high thermal resistance, then heat loss to substrate is reduced, but cooling efficiency deteriorates
Solution Approach 1:
The thermal insulation strategy is segmented by region. Active thermal sites use high thermal resistance insulation to minimize heat loss to the substrate, while passive thermal regions use low thermal resistance insulation to maximize cooling efficiency. This spatial segmentation allows each region to optimize its thermal performance without compromising the other.
Solution Approach 2:
The thermal insulation layers are configured with locally optimized properties - high thermal resistance in active thermal sites to reduce heat loss, and low thermal resistance in passive thermal regions to enhance cooling efficiency. This local quality differentiation resolves the contradiction between reducing heat loss and maintaining cooling efficiency.
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 device achieves efficient bidirectional temperature control, allowing for a broader range of temperatures to be managed at each site, with passive regions aiding in cooling and reducing heat loss from active sites, thus enhancing the overall temperature control efficiency.
Implementation Method 1
each active thermal site comprising a heating element configured to apply a variable amount of heat to a corresponding site of said medium
Implementation Method 2
a thermal insulation layer disposed between the heating element and the substrate
Implementation Method 3
each passive thermal region comprising a thermal conduction layer configured to conduct heat from a corresponding portion of the medium to the substrate
Data Source
AI summary
A temperature control device (2) comprises a number of active thermal sites (6) disposed at respective locations on a substrate (10), each comprising a heating element (13) for applying a variable amount of heat to a corresponding site of a medium and a thermal insulation layer (16) disposed between the heating element and the substrate. At least one passive thermal region (8) is disposed between the active thermal sites (6) on the substrate (10), each passive thermal region (8) comprising a thermal conduction layer (18) for conducting heat from a corresponding portion of the medium to the substrate (10). The thermal conduction layer (18) has a lower thermal resistance in a direction perpendicular to a plane of the substrate (10) than the thermal insulation layer (16). This enables precise control over both heating and cooling of individual sites in a flowing fluid, for example.