Electromagnetic Heating Control via Current Sampling for Medium Detection

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Solution Overview

Problem

Existing electromagnetic heating devices continuously heat after startup, leading to power loss and hardware failure due to lack of medium detection, resulting in low usage convenience.

Innovation Solution

A method and apparatus for controlling an electromagnetic heating device that detects a sampling current to determine if a medium is present, and if not, stops electromagnetic oscillation and power output, using preset determining data and thresholds adjusted based on the type of material being heated.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the electromagnetic heating device continuously heats after startup, then the heating function is maintained, but power loss increases and hardware failure risk increases

Engineering Contradiction:

Improvehardware failure preventionVSAvoidpower loss

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent implements a feedback control mechanism where the control unit continuously monitors the working state of the electromagnetic heating device and adjusts the oscillation circuit accordingly. When no medium is detected or the medium cannot be heated, the control unit automatically stops the oscillation circuit, preventing energy waste and hardware damage. This closed-loop feedback system resolves the contradiction by making the heating device responsive to actual heating needs rather than operating continuously.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The heating device performs self-detection and self-regulation through the control unit monitoring the working state and automatically controlling the oscillation circuit. The system serves itself by detecting the presence and heating status of the medium, then autonomously adjusting its operation to prevent power loss and hardware failure, eliminating the need for external intervention.

Inventive Principle:

Principle #25Self-service

2Ease of operation

If the electromagnetic heating device continuously heats after startup, then the heating capability is maintained, but usage convenience decreases due to lack of medium detection

Engineering Contradiction:

Improveusage convenienceVSAvoidheating efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The control unit performs preliminary detection of the medium's presence and heating status before continuing the heating process. By detecting whether the medium can be heated in advance and adjusting the oscillation circuit accordingly, the system avoids unnecessary continuous heating, thereby improving usage convenience and preventing energy waste while maintaining effective heating capability when needed.

Inventive Principle:

Principle #10Preliminary action

3Loss of energy

If the electromagnetic oscillation and power output circuit stops when no medium is present, then energy waste is prevented, but the device complexity increases due to medium detection requirements

Engineering Contradiction:

Improveenergy waste preventionVSAvoidcontrol system complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The control unit performs multiple functions: it monitors the working state of the electromagnetic heating device, detects the presence and heating status of the medium, and controls the oscillation circuit. By making the control unit multi-functional, the patent prevents energy waste through medium detection without significantly increasing device complexity, as the same control unit handles multiple tasks rather than adding separate dedicated components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 prevents energy waste and hardware failure by accurately detecting the presence of a medium, improving the service life and usage convenience of the device.

Implementation Method 1

An electromagnetic heating device can realize heating without a direct contact with a heated medium by using a principle of electromagnetic induction heating

Methodology Applied

Scientific EffectElectromagnetic induction heating: Electromagnetic Induction

Implementation Method 2

obtaining a sampling current obtained by a current sampling apparatus detecting a main loop in which an electromagnetic oscillation and power output circuit of an electromagnetic heating device is located

Methodology Applied

Scientific EffectElectrical current detection: Ohm's Law

Data Source

PatentUS20230354486A1Method and apparatus for controlling electromagnetic heating device, and electromagnetic heating device

Publication Date: 2023.11.02 SHENZHEN SMOORE TECH LTD

AI summary

A method for controlling an electromagnetic heating device includes: obtaining a sampling current obtained by a current sampling apparatus detecting a main loop in which an electromagnetic oscillation and power output circuit of an electromagnetic heating device is located; detecting, according to the sampling current and preset determining data, whether the electromagnetic heating device accommodates a medium; and controlling, if the electromagnetic heating device does not accommodate a medium, the electromagnetic oscillation and power output circuit to stop electromagnetic oscillation.