Heated blanket

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Solution Overview

Problem

Existing heated blankets face challenges in ensuring safe heating, uniform heating across the surface, and proper temperature control within the desired range.

Innovation Solution

A heated blanket with a self-regulating carbon conductor heating element, integrated with an optional thermostat system to maintain uniform heating and control temperature within a preset range.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a conventional heating element is used, then heating capability is provided, but uniform heating across the surface is not achieved

Engineering Contradiction:

Improveuniform heatingVSAvoidheating uniformity

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The heating element is divided into multiple independent heating zones or segments distributed across the blanket surface. Each segment can be independently controlled or designed with varying resistance characteristics to achieve uniform heat distribution across different areas, preventing hot spots and cold zones.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the heating element are designed with locally optimized properties, such as varying trace widths, resistance values, or heating element density. This allows each local area to contribute appropriately to overall uniform heating, with higher density in areas that need more heat and lower density in areas that need less.

Inventive Principle:

Principle #3Local quality

2Reliability

If heating power is increased to ensure safe heating, then heating effectiveness improves, but temperature control within desired range becomes difficult

Engineering Contradiction:

Improvesafe heatingVSAvoidtemperature control

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

A temperature sensing system is integrated with the heating element to continuously monitor the blanket temperature. The system uses this feedback information to automatically adjust the power delivery to the heating element, increasing power when temperature is low and decreasing power when temperature approaches the desired range, thereby maintaining safe and controlled heating.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The heating system transitions from static, fixed-power heating to dynamic, adjustable-power heating. The system can adapt its heating output in real-time based on temperature conditions, environmental factors, and safety requirements, allowing effective temperature control within the desired range while ensuring safe operation.

Inventive Principle:

Principle #15Dynamics

3Area of stationary object

If heating element coverage is expanded to cover the entire surface, then heating area increases, but risk of overheating and safety issues increases

Engineering Contradiction:

Improveheating areaVSAvoidoverheating risk

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The heating element is segmented into multiple independent zones across the blanket surface. Each segment has its own safety characteristics and can be independently monitored or controlled. This segmentation prevents any single point from overheating and allows distributed heat management across the entire heating area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Temperature sensing elements, thermal barriers, or control intermediaries are placed between the heating element and the blanket material or user contact surfaces. These intermediaries monitor temperature conditions and provide thermal management, preventing direct overheating while allowing the heating element to cover the entire surface area.

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 solution provides uniform and safe heating across the blanket surface, ensuring that the temperature remains within the desired range, thus effectively addressing the challenges of existing heated blankets.

Implementation Method 1

A heated blanket is presented that includes a self-regulating heating element, having a carbon conductor for example, for uniform heating of the heated blanket

Methodology Applied

Scientific EffectJoule heating: Joule Heating