Elongated Burner Extender with Suspension for Ergonomic Handling
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Solution Overview
Problem
Existing hot air generators/burners face issues with gas mixture retention leading to explosions upon shutdown, electrical charge absorption due to conductive extenders, and non-homogeneous gas mixing, which result in operational inefficiencies and safety concerns, particularly when used for low-temperature heating of plastic films or laying thermoplastic materials.
Innovation Solution
The design incorporates an elongated extender with suspension means at the center of gravity for easier handling, a handle or body harness for support, and an adjustable orientation mechanism between the extender and burner head, along with a retractable holding device to alleviate operator strain and improve ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the extender is made in an electrically conducting material and connected to ground, then electrical connection is established, but the capacitor absorbs significant electric charge reducing ignition reliability
Solution Approach 1:
The patent introduces an electrically insulating extender as an intermediary component between the gas supply system and the burner head. This insulating extender prevents the formation of the capacitive charge-absorbing structure while still allowing the necessary gas flow and ignition functions to operate effectively, thereby resolving the contradiction between electrical connection and charge absorption.
2Adaptability or versatility
If the extender length is increased to enable greater working distance, then operator safety and versatility are improved, but the device becomes harder to control and balance
Solution Approach 1:
The patent employs a telescopic extender mechanism that allows dynamic adjustment of the extender length. The extender can be extended to achieve greater working distances for safety and versatility, then retracted when needed for better control and balance, thus resolving the contradiction between fixed length limitations and operational flexibility.
Solution Approach 2:
The patent incorporates a balance weight positioned on the extender to counterbalance the weight of the burner head and gas supply system. This counterweight mechanism compensates for the increased moment arm created by the extended extender, maintaining device balance and ease of operation even at greater working distances.
3Stability of the object's composition
If deflectors are added to improve gas flow homogeneity, then mixing quality improves, but the flow velocity decreases
Solution Approach 1:
The patent employs a diffusion grating with specifically designed local perforations that create controlled turbulence and mixing zones. The grating structure provides localized flow modification to improve homogeneity without requiring extensive deflectors that would significantly reduce overall flow velocity, thus resolving the contradiction between mixing quality and speed.
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 configuration allows for efficient, safe, and ergonomic operation, enabling the burner to be used at greater distances and over larger surfaces without operator fatigue, with improved temperature control and adaptability to user heights and morphologies.
Implementation Method 1
an injection device capable of producing a high velocity flow of combustible gas mixture
Implementation Method 2
with a view to their retraction by means of a gas flow stemming from the combustion of a combustible gas
Implementation Method 3
diffusion means which may comprise a grating or even a set of two gratings
Data Source
AI summary
The invention relates to an apparatus comprising an injection device (1) for producing a flow of a high-speed combustible gas mixture, and a burner head (2) in which said flow is injected through a tabular extender (70) connecting said injection device (1) to said head (2). The extender has a maximal length higher than 600 mm and includes at the gravity center of the device assembly, means for suspension to a portion of the operator's body.