Popcorn Popper Reflective Heating for Even Kernel Popping

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Solution Overview

Problem

Conventional popcorn poppers are inefficient in heat transfer, leading to uneven heating and waste of heat, resulting in substandard popping and potential burning of kernels, while mechanical stirrers often cause kernels to bunch, leading to inconsistent heating and soggy popcorn due to steam buildup.

Innovation Solution

A popcorn popper design featuring a reflective surface to focus stray radiant heat back onto the heating surface, a mechanical stirrer with arched arms to evenly distribute kernels, and a cover with vents and a topping reservoir to prevent steam buildup and ensure even topping distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If heat is radiated outwardly from a heat source to a heating surface, then the heating process is simple, but substantial heat is dissipated to the environment resulting in inefficient heat transfer

Engineering Contradiction:
Improveheat dissipationVSAvoidheating system structure
Core Design Contradiction:
Loss of energyVSDevice complexity

Solution Approach 1:

The patent converts the harmful effect of stray radiant heat (which would otherwise be lost to the environment) into a beneficial effect by using a reflective surface to redirect this stray heat back onto the heating surface or kernels, thereby reducing heat loss and improving heating efficiency

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces a reflective surface element that operates in a different spatial dimension (below or around the heat source) to intercept and redirect heat rays, adding a new dimensional approach to heat management without significantly complicating the overall heating system structure

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Temperature

If kernels are placed on a heating surface above a heat source, then the heating process is straightforward, but different thermal zones are formed causing uneven heating and substandard popping

Engineering Contradiction:
Improveheating uniformityVSAvoidheat distribution system
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The patent applies local quality by using a reflective surface positioned at specific locations (below or around the heat source) to redirect heat to specific areas of the heating surface or kernels, creating localized heat enhancement zones that compensate for areas that would otherwise be underheated

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The reflective surface creates a feedback mechanism where heat that would be lost is redirected back to the heating surface or kernels, providing continuous heat reinforcement to areas that need it most, thereby improving overall temperature uniformity

Inventive Principle:
Principle #23Feedback

3Stability of the object's composition

If a mechanical stirrer is used to mix kernels during heating, then kernel distribution may be improved, but kernels often bunch up leading to inconsistent heating and soggy popcorn

Engineering Contradiction:
Improvekernel distributionVSAvoidpopping quality
Core Design Contradiction:
Stability of the object's compositionVSReliability

Solution Approach 1:

The patent removes the mechanical stirrer component entirely from the system, extracting the problematic element that caused kernel bunching while maintaining kernel distribution through alternative means such as reflective heat distribution that heats kernels more uniformly in place

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent enables the heating system to self-distribute heat uniformly across kernels through the reflective surface, eliminating the need for mechanical intervention and allowing kernels to be heated evenly without being moved or bundled by stirrer arms

Inventive Principle:
Principle #25Self-service

4Reliability

If a thick coating of oil or fat is used to evenly distribute heat and control heating rate, then popping performance is improved, but monetary and health benefits are compromised

Engineering Contradiction:
Improvepopping performanceVSAvoidoil or fat consumption
Core Design Contradiction:
ReliabilityVSLoss of substance

Solution Approach 1:

The patent replaces the mechanical/chemical heat distribution mechanism (oil or fat coating) with a physical reflective heat redirection system that achieves uniform heat distribution through light/heat reflection rather than through a medium, thereby eliminating or reducing the need for oil or fat

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental parameter of heat transfer from conduction through a medium (oil/fat) to radiation reflection, fundamentally altering how heat is distributed and enabling effective popping with minimal or no oil or fat

Inventive Principle:
Principle #35Parameter changes

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 design enhances heat transfer efficiency, prevents kernel bunching, and ensures even heating and topping distribution, resulting in improved popping efficiency and texture, reducing waste and the risk of burning.

Implementation Method 1

a reflective surface to focus stray radiant heat back onto the heating surface

Methodology Applied
Scientific EffectRadiation: Thermal Radiation

Implementation Method 2

reflective surface to focus stray radiant heat back onto the heating surface

Methodology Applied
Scientific EffectReflection: Reflection

Implementation Method 3

a heating element and a heating surface. The heating element is disposed immediately below the heating surface and transfers heat to the heating surface via conduction

Methodology Applied
Scientific EffectHeat conduction: Conduction (thermal)

Implementation Method 4

a mechanical stirrer with arched arms to evenly distribute kernels

Methodology Applied
Scientific EffectMechanical stirring: Stirring

Implementation Method 5

a cover with vents and a topping reservoir to prevent steam buildup

Methodology Applied
Scientific EffectSteam venting: Evaporation

Data Source

PatentUS9198532B2Energy efficient apparatus and method for popping popcorn
Publication Date: 2015.12.01 NATIONAL PRESTO IND INC
  • US9198532B2 patent drawing
  • US9198532B2 patent drawing
  • US9198532B2 patent drawing

AI summary

A popcorn popper having a heat source transferring heat to a heating surface and also having a reflective surface for focusing the heat radiated by the heat source toward the heating surface. The popcorn popper can include a mechanical stirrer on the heating surface for shifting the kernels during heating and evenly distributing the kernels across the heating surface. The popcorn popper can have a cover with an integrated reservoir for holding toppings for the popcorn, wherein the reservoir is adapted to drain the topping through the cover without fouling the cover air vents and evenly distribute the topping onto the kernels.