Handheld Heating Tool with Elliptical Reflectors
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Solution Overview
Problem
Existing handheld heating tools for heat shrinkable tubing are cumbersome, requiring the workpiece to be transported to a heating apparatus, limiting convenience and efficiency in applications like heating electrical wiring bundles.
Innovation Solution
A handheld tool with elliptical reflectors and incandescent bulbs that focuses radiant energy onto a focal region within a channel, allowing for localized heating and featuring a blower for cooling, enabling the tool to be used directly on the workpiece and providing controlled heating and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating apparatus is designed to provide concentrated high temperature heating, then heating effectiveness is improved, but the apparatus becomes stationary and requires workpiece transport, reducing operational convenience
Solution Approach 1:
Instead of bringing the workpiece to a stationary heating apparatus, the patent inverts the approach by creating a handheld tool that brings the heating elements directly to the workpiece. The heating apparatus is made portable and can be applied directly to the tubing at the work location, eliminating the need to transport the workpiece to the heater.
Solution Approach 2:
The heating apparatus is divided into separate functional components: incandescent bulbs for heat generation, elliptical reflectors for heat concentration, and a handheld housing for portability. This segmentation allows the heating function to be detached from stationary equipment and integrated into a mobile tool.
2Temperature
If incandescent bulbs are used to generate heat, then heating capability is improved, but heat dissipation occurs through hot air discharge, reducing energy efficiency
Solution Approach 1:
The patent converts the harmful effect of hot air discharge into a beneficial cooling mechanism. A blower directs ambient air through channels that pass over the incandescent bulbs and internal components, using the discharged air to cool the heating elements and housing. This transforms energy loss into a useful thermal management function.
Solution Approach 2:
The patent introduces a pneumatic cooling system using a blower to circulate air through internal channels. This pneumatic system provides active cooling of the heating elements and housing, improving energy efficiency by preventing excessive heat buildup and enabling continuous operation.
3Ease of operation
If handheld portability is implemented, then operational convenience is improved, but the device becomes more complex with multiple components, increasing manufacturing difficulty
Solution Approach 1:
The housing serves multiple functions: it provides the handheld structure, contains and positions the heating elements and reflectors, provides thermal insulation, and incorporates cooling channels. This multi-functionality reduces the need for separate components and simplifies manufacturing.
Solution Approach 2:
The patent merges several functions into integrated components: the reflectors are positioned within the housing to simultaneously concentrate heat and define the heating zone, the blower is integrated to provide both cooling and air circulation, and the housing itself serves as both structure and thermal barrier.
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 efficient, localized heating of heat shrinkable tubing and other objects, improving convenience and reducing the need to transport objects to a heating apparatus, while maintaining effective temperature control and minimizing heat dissipation through radiant energy rather than hot air discharge.
Implementation Method 1
The reflectors focus radiant energy from incandescent bulbs in the reflectors toward a focal region lying in a channel across the nose of the tool housing
Implementation Method 2
heating elements such as incandescent bulbs within reflectors which concentrate the heat from such bulbs
Implementation Method 3
A blower directs cooling air through various paths within the housing
Data Source
AI summary
A handheld heating tool has a pair of elliptical reflectors with the major axes of the ellipses being at an acute angle to each other and intersecting in a focal region including one focus of each ellipse. A pair of incandescent bulbs are mounted so that each bulb filament is at the other focus of one of the elliptical reflectors. Thus, radiant energy from both bulbs is concentrated at the focal region. This focal region lies in a channel at the front of the housing of the tool. An object to be heated lying in the channel receives radiant energy from the lamps and reflectors. A blower directs cooling air toward the reflectors and along different paths within the housing to exit through the channel. One such path is between the outside of the reflectors and adjacent reflector shields.