Electric Heating Device Temperature Control via Heat Dissipation Portion

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Solution Overview

Problem

Conventional electric heating devices with sealing portions struggle to accurately measure the temperature of objects being sealed, leading to suboptimal sealing quality due to the interference of heating elements with temperature measurement.

Innovation Solution

An electric heating device with a heat dissipation portion and a control system that calculates the object's temperature based on the before-heating temperature and electric energy supplied, using a temperature detection portion to ensure accurate temperature control and sealing by separating the measurement from the heating process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a temperature measurement portion is used to continuously measure the temperature of the heater, then the heater temperature can be monitored, but the temperature of the object being sealed cannot be accurately measured

Engineering Contradiction:

Improvetemperature measurement accuracyVSAvoidobject temperature information

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent introduces a heat dissipation portion as an intermediary element between the heater and the object. This heat dissipation portion has a known thermal relationship with the heater, allowing the control portion to calculate the heater temperature and subsequently the object temperature based on measurements of the heat dissipation portion's temperature, rather than directly measuring the heater or object temperatures

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system uses the thermal characteristics of the heat dissipation portion to serve the measurement function. By measuring the temperature of the heat dissipation portion (which is in thermal contact with both the heater and the object), the system can derive information about both the heater and object temperatures through calculation, making the heat dissipation portion serve multiple functions

Inventive Principle:

Principle #25Self-service

2Use of energy by moving object

If the heater is placed in direct contact with the object for heating, then heating efficiency is improved, but temperature measurement of the object becomes impossible

Engineering Contradiction:

Improveheating efficiencyVSAvoidobject temperature measurement

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The patent segments the thermal contact path by introducing a heat dissipation portion between the heater and the object. This segmentation allows temperature measurement at the heat dissipation portion while maintaining thermal coupling for efficient heat transfer to the object

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The heat dissipation portion acts as a mediator that enables both efficient heat transfer to the object and provides a measurable temperature point for the control system to calculate object temperature

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the temperature of the heater is controlled to a predetermined temperature, then the heater operation is simplified, but the sealing quality varies due to unknown object temperature

Engineering Contradiction:

Improveheater control simplicityVSAvoidsealing quality consistency

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the control portion continuously monitors the temperature of the heat dissipation portion and calculates both the heater temperature and object temperature. Based on these calculated temperatures, the control portion adjusts the power supplied to the heater to maintain the object at the desired sealing temperature, ensuring consistent sealing quality

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system transitions from a static predetermined heater temperature to a dynamic temperature control system that continuously adjusts heater power based on real-time temperature measurements and calculations, adapting to varying thermal conditions during the sealing process

Inventive Principle:

Principle #15Dynamics

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

This solution improves the sealing quality by allowing precise temperature control and measurement, ensuring the object is sealed at the desired temperature, enhancing the efficiency and effectiveness of the sealing process.

Implementation Method 1

a heater adapted to generate heat by being energized

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

heat from the heater is transferred thereto, and the heat dissipation portion being adapted to dissipate this heat

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Data Source

PatentUS11173671B2Electric heating device

Publication Date: 2021.11.16 FUJI IMPULSE

AI summary

An electric heating device includes a control portion adapted to control electric energy supplied to a heater, based on a before-heating temperature, which is a temperature of at least one of an object, the heater and a heat dissipation portion before the heater generates heat, the control portion is adapted to calculate the temperature of the object, based on the before-heating temperature and the electric energy supplied to the heater.