Induction cooker
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Solution Overview
Problem
High-end induction cookers with multiple stoves cannot effectively control the temperatures of pots placed on each stove due to the inability to identify which stove corresponds to a received temperature signal, hindering precise temperature adjustments.
Innovation Solution
Each stove generates a unique periodically cyclic modulation signal sequence, allowing the controller to distinguish and control individual stoves, enabling accurate temperature control of pots through a digital identification system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is provided on each pot to detect temperature, then temperature detection capability is improved, but the controller cannot determine which stove the received temperature signal corresponds to, worsening the control precision
Solution Approach 1:
The patent divides the identification system into segments: each stove is assigned a unique identification code, and the controller segments the received temperature signals by matching them with the corresponding stove identification codes. This segmentation allows the controller to distinguish which temperature signal belongs to which stove, resolving the information loss problem.
Solution Approach 2:
The patent implements a feedback mechanism where the controller sends drive signals with embedded identification codes to each stove, and the stoves feedback their temperature signals with corresponding identification codes. This feedback loop ensures the controller can accurately match temperature readings with the correct stove, improving control precision.
2Device complexity
If multiple stoves operate simultaneously without identification signals, then device complexity is reduced, but the ability to control individual stove temperatures is lost, worsening operational effectiveness
Solution Approach 1:
The patent makes the drive signal serve multiple functions: it both drives the transmitting coil to generate magnetic fields for heating and carries identification codes for stove recognition. This multi-functionality allows individual temperature control without adding separate identification hardware, maintaining simplicity while improving operational effectiveness.
Solution Approach 2:
The patent changes the parameters of the drive signal by embedding different identification codes in the signals sent to different stoves. By varying the identification code parameter within the existing drive signal framework, the system enables individual stove control without increasing overall device complexity.
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
Enables precise temperature control of multiple pots on an induction cooker by identifying and distinguishing stoves through unique modulation signal sequences, improving the cooker's operational efficiency.
Implementation Method 1
each having a transmitting coil and a driver driving the transmitting coil
Implementation Method 2
The drive signal of each of the stoves is a periodically cyclic modulation signal sequence. The stoves are identifiable and distinguishable from each other by the periodically cyclic modulation signal sequences that are different for each of the stoves
Data Source
AI summary
An induction cooker including a plurality of stoves each having a transmitting coil and a driver driving the transmitting coil, and a controller controlling the driver of each of the stoves to generate a drive signal. The drive signal of each of the stoves is a periodically cyclic modulation signal sequence. The stoves are identifiable and distinguishable from each other by the periodically cyclic modulation signal sequences that are different for each of the stoves.