Infrared Generator Coating with Graphite and Carbon Black

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Traditional infrared (IR) generators for medical applications have high material and production costs due to the use of rare and expensive metal oxides in their coatings, which are complex to mix and manufacture.

Innovation Solution

An IR generator with a coating composition of graphite and carbon black in a 1:1-1:2 ratio, providing high IR emissivity while reducing conductivity and oxidation issues, thus lowering material and production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional metal oxide coating is used to achieve high IR emissivity, then IR emission performance is improved, but material cost and production cost increase significantly

Engineering Contradiction:

ImproveIR emissivityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces expensive metal oxide coating with a low-cost carbon-based coating composed of graphite and carbon black. This substitution dramatically reduces material cost while maintaining high IR emissivity in the 6-14 μm bio-spectrum range, directly resolving the contradiction between performance and manufacturing cost.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent uses a composite coating material consisting of graphite and carbon black in specific proportions. This composite approach combines the high IR emissivity of graphite with the cost-effectiveness and oxidation resistance of carbon black, achieving both performance and cost objectives simultaneously.

Inventive Principle:

Principle #40Composite materials

2Reliability

If multiple metal oxides are mixed to form traditional IR coating, then IR emissivity is improved, but manufacturing complexity increases

Engineering Contradiction:

ImproveIR emissivityVSAvoidmanufacturing process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the essential function of IR emission from complex metal oxide systems and achieves it through a simplified carbon-based coating. By removing unnecessary metal oxide components and processes, the manufacturing complexity is dramatically reduced while maintaining or improving IR emissivity performance.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses a homogeneous carbon-based coating system where graphite and carbon black are mixed in specific proportions to create a uniform coating layer. This homogeneous approach simplifies the manufacturing process compared to mixing multiple different metal oxides, while achieving consistent high IR emissivity across the coating surface.

Inventive Principle:

Principle #33Homogeneity

3Reliability

If graphite is used as IR coating to achieve high emissivity, then IR emission is improved, but electrical conductivity increases causing electro-thermal body deterioration

Engineering Contradiction:

ImproveIR emissivityVSAvoidelectrical conductivity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent creates a composite coating where graphite (providing high IR emissivity) is combined with carbon black (providing oxidation resistance and reduced conductivity). The specific proportioning of these materials achieves the optimal balance: maintaining high IR emissivity while reducing electrical conductivity to safe levels that prevent electro-thermal body deterioration.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

Carbon black acts as an intermediary material that modifies the electrical properties of the graphite coating. By incorporating carbon black into the graphite matrix, the overall electrical conductivity is reduced while the IR emissivity is preserved, effectively mediating between the conflicting requirements of high emission performance and low harmful conductivity.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 IR generator achieves excellent IR emissivity, particularly in the far-IR range, with a significantly lower material cost, making it more affordable and easier to produce compared to traditional IR generators.

Implementation Method 1

The electro-thermal body is located on the base body and generates heat when electric power is supplied

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

The IR emitting body is located on the electro-thermal body and emits IR when absorbing the heat

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 3

The IR coating generates IR when absorbing heat generated by electro-thermal body

Methodology Applied

Scientific EffectHeat absorption: Absorption (EM radiation)

Data Source

PatentUS7511291B2Infrared ray generator

Publication Date: 2009.03.31 FAR MEDICAL TECH

AI summary

An IR generator comprises a base body, an electro-thermal body and an IR emitting body. The electro-thermal body is located on the base body and generates heat when electric power is supplied. The IR emitting body is located on the electro-thermal body and emits IR when absorbing the heat. The IR emitting body comprises an IR coating. The composition of the IR coating comprises graphite and carbon black. The ratio between the graphite and the carbon black is about 1:1-1:2.