Removable heating lid
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Solution Overview
Problem
Existing removable heated lids for electric cooking appliances lack sufficient safety and adaptability, as they can be placed on worktops without disabling the heating element and are not compatible with kitchen utensils or cooking appliance bowls of varying sizes.
Innovation Solution
A removable heated lid with a safety device featuring movable actuating means and a switch that enables or disables the heating element based on the lid's position, allowing for use with different-sized utensils and appliances, and incorporating a return mechanism to default safety mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single switch actuated by a movable handle is used, then the device complexity is reduced, but the safety is insufficient because the heating element can be activated when the lid is placed on a worktop
Solution Approach 1:
The single switch is divided into two independent switches (first switch and second switch), each controlled by its own actuating means. This segmentation ensures that both the front and back edges of the lid must be properly positioned on the utensil rim to activate the heating element, preventing accidental activation on worktops while maintaining relatively simple device structure.
2Reliability
If a fixed handle with edge interaction is used, then the safety is improved by preventing activation unless placed on the utensil, but the adaptability is reduced to only one specific diameter
Solution Approach 1:
The actuating means are made movable relative to the lid body, allowing their radial positions to be adjusted. This dynamic configuration enables the same lid to accommodate utensils of different diameters while maintaining the safety function that requires the lid to be properly seated on the utensil rim for activation.
Solution Approach 2:
The lid is designed with adjustable actuating means that can adapt to multiple utensil sizes, making a single lid design universal for different diameters. The movable actuating means serve both the safety function (preventing accidental activation) and the adaptability function (working with various utensil sizes).
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
Ensures safe operation by disabling the heating element when not in use and adapts to various kitchen utensil and appliance sizes, enhancing safety and usability.
Implementation Method 1
an electric heating element
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a removable heating cover (1) comprising an electric heating element (3) and a safety device (10) comprising first actuating means (11) positioned at a first distance (D1) from a lateral edge (6) of the removable heating cover (1) and having a first rest position (P11) and a second retracted position (P21), and second actuating means (12) positioned at a second distance (D2) from the lateral edge (6) of the removable heating cover (1) and also having a first rest position (P12) and a second retracted position (P22), said safety device 10 having a first operating mode (F1) in which the electric supply to the electric heating element (3) is permitted when the first actuating means (11) or the second actuating means (12) are placed in their second retracted position (P21, P22),and a second operating mode (F2) in which the power supply to the electric heating element (3) is not permitted when the first actuation means (11) or the second actuation means (12) are in their first rest position (P11, P12).