Magnetic Induction Heating Unit for Large Hair Rollers
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Solution Overview
Problem
Existing hair styling tools, such as hot rollers and curling irons, are inefficient in heating large rollers, consume excessive energy, and lack the ability to provide lift and curl simultaneously, necessitating salon visits for effective styling.
Innovation Solution
A heating unit utilizing magnetic inductance to rapidly heat large rollers (2 inches or more) with high efficiency, achieving temperatures up to 400 degrees in under 5 seconds, using a combination of magnetic cores and conductive windings to induce current in the rollers, which are lightweight and feature bristles for root lift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If conventional direct contact heating is used, then heating is achieved, but heating time is long (up to 20 minutes) and power consumption is high (0.13 kWh)
Solution Approach 1:
The patent replaces conventional thermal conduction heating (mechanical contact between heated post and roller) with electromagnetic induction heating. The induction heating element generates an oscillating magnetic field that induces eddy currents within the roller, converting electrical energy directly into heat within the roller itself, eliminating the need for prolonged thermal contact and significantly reducing both heating time and energy consumption.
Solution Approach 2:
The invention utilizes the phase transition of electromagnetic energy to thermal energy through electromagnetic induction. The oscillating magnetic field causes molecular vibration and friction within the conductive roller material, transforming electromagnetic energy into intense localized heat rapidly, achieving the desired heating effect in seconds rather than minutes.
2Adaptability or versatility
If large diameter rollers (2 inches or more) are used, then root lift capability is improved, but conventional heating cannot effectively heat them
Solution Approach 1:
The patent employs electromagnetic induction heating instead of conventional contact heating to effectively heat large diameter rollers. The oscillating magnetic field penetrates the entire volume of the large roller simultaneously, inducing eddy currents throughout the roller material, ensuring uniform and rapid heating of the entire roller surface including the portions that provide root lift capability.
Solution Approach 2:
The invention transitions from surface-level thermal contact heating to volumetric electromagnetic heating. The magnetic field penetrates through the entire roller volume, heating the material from the inside out simultaneously, which is particularly effective for large diameter rollers where conventional surface heating would be inefficient and time-consuming.
3Temperature
If conventional heating methods are used, then heating is achieved, but energy efficiency is low (400 W heat transfer efficiency)
Solution Approach 1:
The patent replaces inefficient thermal conduction heating with electromagnetic induction heating. The induction process generates heat directly within the roller material through induced eddy currents, eliminating energy losses associated with thermal contact resistance and heat dissipation to the heating element. This internal heat generation mechanism achieves superior energy efficiency with heat transfer efficiency exceeding 90%.
4Weight of moving object
If lightweight rollers are used, then root lift is provided, but conventional heating cannot achieve sufficient temperature
Solution Approach 1:
The invention uses electromagnetic induction heating to rapidly achieve high temperatures in lightweight rollers. The oscillating magnetic field induces strong eddy currents within the lightweight conductive roller material, generating intense heat internally despite the low mass. This allows lightweight rollers to reach the necessary styling temperatures (400-450°F) in seconds, maintaining both the weight advantage for root lift and the temperature requirement for effective styling.
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 quick, energy-efficient heating of large rollers, providing hands-free styling with lift and curl, reducing energy consumption to 0.002 kWh and eliminating the need for direct contact heating, thus mimicking a salon blowout at home.
Implementation Method 1
heating units disclosed herein employ magnetic inductance to be able to rapidly heat rollers that are 2 inches in diameter and larger without the need for direct contact to a heat source
Implementation Method 2
When energized, the conductive windings generate a magnetic field within the square closed core that induces an electric current to circulate in a roller disposed around the second of the two legs
Data Source
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AI summary
Heating units for heating hair rollers are provided, as well as rollers for use therewith. An exemplary heating unit (100) includes a housing (110) having a lid (200) and a lower portion (220), with a first magnetic core (140) disposed within the lower portion and a second magnetic core (150) disposed within the lid (200). The first magnetic core (140) includes two parallel legs, and a plurality of conductive windings (130) wound around one of the two legs. When the housing (110) is closed the first and second magnetic cores (140, 150) together form a square closed core. When energized, the windings (130) generate a magnetic field within the square closed core that induces an electric current in a roller disposed around the second of the two legs. An exemplary roller for use with the heating unit (100) comprises a conductive cylinder, such as aluminum, having a diameter of at least two inches and including bristles protruding perpendicular to the exterior surface.