Pipe Heat Exchanger with Out-of-Plane Deflections for Baking Ovens
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Solution Overview
Problem
Existing pipe heat exchangers for baking ovens lack efficiency and flexibility in heating the baking space, as they primarily rely on either radiant or convective heat transfer, without effectively combining both mechanisms.
Innovation Solution
A pipe coil heat exchanger design with adjacent sections spaced closer than the pipe diameter, featuring two coil line paths and 180° deflection sections out of the plane, allowing for efficient heat transfer through both radiation and convection, and a production method that involves sequential bending and assembly of pipes to create adaptable coil paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If pipe sections are arranged with small distance smaller than pipe diameter, then heat transfer efficiency is improved by enabling both radiant and convective heating, but spatial conflicts occur between deflection sections of different coil line paths
Solution Approach 1:
The patent guides 180° deflection sections out of the arrangement plane for at least one of the coil line paths, utilizing the third dimension (vertical direction) to resolve spatial conflicts. This allows adjacent pipe sections to maintain small distances for efficient heat transfer while preventing interference between deflection sections of different coil line paths by positioning them at different heights.
2Use of energy by moving object
If pipe sections are arranged with small distance between them, then convective heat transfer to circulating air is enhanced, but passage for fluid flow between pipe sections is reduced
Solution Approach 1:
The patent applies different distance relationships in different locations: between adjacent pipe sections in the arrangement plane, the distance is small (less than pipe diameter) to enhance convective heat transfer to circulating air; between 180° deflection sections and the arrangement plane, the distance is larger to maintain adequate fluid flow passages. This local differentiation of spatial relationships optimizes both heat transfer and fluid flow.
3Adaptability or versatility
If multiple coil line paths are implemented for flexibility, then adaptability to spatial requirements is improved, but device complexity and production difficulty increase
Solution Approach 1:
The patent divides the heat exchanger into multiple coil line paths (first coil line path and second coil line path, each with inlet and outlet), allowing independent configuration of each path. This segmentation enables flexibility in adapting to different spatial requirements while maintaining manageable complexity through standardized path structures.
Solution Approach 2:
By guiding 180° deflection sections out of the arrangement plane, the patent enables multiple coil line paths to coexist in three-dimensional space without interfering with each other. This dimensional separation allows greater flexibility in line path arrangement while preventing the complexity from becoming unmanageable.
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 enhances heat transfer efficiency by combining radiant and convective heating mechanisms, allowing for flexible installation and improved spatial utilization, while maintaining production simplicity.
Implementation Method 1
The advantages of heating a baking space using radiant heat from the pipe heat exchanger can thus be combined with the advantages of a convective heat transfer
Implementation Method 2
The advantages of heating a baking space using radiant heat from the pipe heat exchanger can thus be combined with the advantages of a convective heat transfer, in particular in a baking space heatable by circulating air
Implementation Method 3
a defined small distance between adjacent pipe sections of the pipe heat exchanger, which is smaller than a pipe diameter, results in an efficient heat transfer from the pipe sections to a fluid, for example air
Data Source
AI summary
A pipe heat exchanger for a baking oven has a plurality of heat exchanger pipe sections configured to guide a heat carrier fluid, the heat exchanger pipe sections being arranged adjacent to each other in an arrangement plane. A distance between adjacent pipe sections is smaller than a pipe diameter and greater than 1% of the pipe diameter. The result is a pipe heat exchanger, which allows a baking space to be heated efficiently and variably.