Pot usable on induction plates
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Solution Overview
Problem
Current induction pots heat up excessively, posing safety risks to users and inefficiently manage electric power for accessories like timers and mixing devices, which can be hazardous and inconvenient.
Innovation Solution
A pot with an external thermally insulating non-magnetic or diamagnetic material and an electrically-powered auxiliary device that can be powered directly by the induction plate, featuring a power supply inductor and various auxiliary functions such as mixing, heating, and safety features like temperature control, integrated into the design to ensure user safety and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the pot base is made of ferromagnetic material for induction heating, then the pot can be heated efficiently by the induction plate, but the external surface of the pot becomes dangerously hot posing safety risks to users
Solution Approach 1:
The pot base is segmented into two distinct layers: an inner ferromagnetic layer for induction heating and an outer non-magnetic thermally insulating layer. This segmentation allows the inner layer to efficiently absorb electromagnetic energy while the outer layer prevents heat transfer to the external surface, resolving the contradiction between heating efficiency and external temperature safety.
Solution Approach 2:
The pot base uses a composite structure combining ferromagnetic material (for magnetic permeability and induction heating) with non-magnetic thermally insulating material (for thermal isolation). This composite material approach enables simultaneous achievement of efficient energy absorption and external surface temperature control.
2Ease of manufacture
If accessories like timers and mixing devices are made removable for washing, then the pot can be cleaned properly, but managing electric power supply becomes inconvenient and hazardous
Solution Approach 1:
The auxiliary device is merged with the pot body through a fixed, integrated connection rather than being removable. This integration ensures that electrical connections remain stable and safe during operation, eliminating the hazards associated with removable power leads while maintaining cleanability through the overall design.
Solution Approach 2:
An intermediary fixed connection structure is introduced between the auxiliary device and power supply, providing a stable electrical connection that prevents contact with hot surfaces while ensuring reliable power delivery to the auxiliary heating element.
3Use of energy by moving object
If a secondary coil and heater are added to heat the upper side of the inner pot, then heating coverage is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The system uses the induction plate's electromagnetic field to directly induce currents in the ferromagnetic base, which then self-heats and transfers heat to the pot contents. This self-heating mechanism eliminates the need for additional heating elements or control systems, maintaining simplicity while achieving effective heating.
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 pot maintains a safe external temperature during cooking, integrates additional functions without additional power sources, and is easy to produce with low implementation costs, addressing user safety and convenience issues.
Implementation Method 1
pots whose base contains at least one active portion made of ferromagnetic material and therefore, if struck by the electromagnetic field generated by the induction hob, able to heat up thanks to the Joule effect due to electric currents induced in it by that electromagnetic field
Implementation Method 2
electromagnetic field generated by the induction hob... electric currents induced in it by that electromagnetic field
Implementation Method 3
outer containment body at least partly made of a material that is thermally insulating
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A pot usable on induction plates comprising an outer containment body (2) at least partly made of a material that is thermally insulating and non-magnetic or diamagnetic, and which forms at least one main housing seat (3); a container (4) at least partly made of thermally conductive material, mounted in the main housing seat (3) and comprising at least one active portion (5) made of ferromagnetic material that can be heated by electromagnetic induction; at least one power supply inductor (12) associated with the outer containment body (2) and which can be powered by electromagnetic induction; and at least one electrically-powered auxiliary device (11 ), electrically connected to the power supply inductor (12) so that it can be powered by the latter; wherein the auxiliary device (11 ) comprises for example an additional heating device (20), a mechanical manipulation device designed, in use, to apply a mechanical action to the contents of the container (4), or a measuring device designed, in use, to measure the temperature of the container (4) or of its contents, or the pressure inside the container.