Coiled-Path Hot Gas Generator for Low-Pressure-Drop Activation
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Solution Overview
Problem
Existing hot gas generation devices for edge band activation suffer from high pressure drop and inefficient temperature regulation due to the use of sintered materials, leading to a large and inefficient system design.
Innovation Solution
A compact hot gas generation device with a gas conveyance path coiled around an axis within the housing, utilizing a power source integrated inside or attached to the housing, which heats the gas to 300-400°C with minimal pressure loss, allowing for efficient activation of coating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If sintered material is used in the heating device, then heating capability is improved, but pressure drop increases and system size increases
Solution Approach 1:
The patent changes the physical configuration of the heating element from a dense sintered structure to a coil-shaped arrangement, fundamentally altering how heat is transferred to the gas while reducing flow resistance. This parameter change allows maintaining heating effectiveness while significantly reducing pressure drop.
Solution Approach 2:
The heating element is arranged in a coil shape that extends in multiple spatial dimensions rather than a linear or planar configuration. This three-dimensional coil structure increases the heating surface area available to the gas flow while maintaining a compact form factor that does not increase system size proportionally.
2Temperature
If sintered material is used in the heating device, then heating capability is improved, but device size increases
Solution Approach 1:
The coil-shaped heating element is nested within the existing housing structure, utilizing the available internal volume efficiently. The coil configuration allows the heating element to be contained within the same housing that accommodates the motor and other components, eliminating the need for additional space.
Solution Approach 2:
The coil shape of the heating element provides a curved, three-dimensional structure that maximizes surface area within a compact volume. This curved configuration is more space-efficient than linear arrangements, allowing the heating element to fit within the confined housing space while providing adequate heating surface area.
3Temperature
If long gas conveyance path is used for heating, then heating effectiveness is improved, but pressure drop increases
Solution Approach 1:
The heating is localized to specific regions along the gas conveyance path where the coil-shaped heating element is positioned. Rather than requiring a uniformly long conveyance path, the heating function is concentrated in specific locations where the coil structure provides intensive local heating, reducing the overall path length needed.
Solution Approach 2:
The gas is preheated as it passes through the coil-shaped heating element before entering the main conveyance path. This preliminary heating action reduces the temperature differential needed later in the process, allowing for a shorter overall heating path and reduced pressure drop.
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 solution enables a compact, energy-efficient design with reduced pressure drop and rapid heating, ensuring effective activation of coating materials while maintaining low inlet pressure, thus improving the overall performance and efficiency of the hot gas generation system.
Implementation Method 1
a heating element embedded therein, for example an electrically operated or gas-operated heating element
Implementation Method 2
the power source is a resistance heater cartridge
Implementation Method 3
Since the gas is heated in the gas conveyance path, and therefore expands along the direction of flow
Implementation Method 4
Since the gas is heated in the gas conveyance path, and therefore expands along the direction of flow
Data Source
AI summary
A hot gas generation device with which a gas flow, for example, an air flow, is heated. This device is used for heating an edge band or another coating material, in particular an adhesive layer provided on this coating material. In this way, the coating material is prepared for being applied to a (wooden) work piece, which may, for example, be plate-shaped.