Cooking Heater Light Flow for Heat Output Recognition
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Solution Overview
Problem
Users, especially those with visual impairments, find it difficult to recognize whether a cooking heater's heating source is operational and its output level due to lack of clear visual cues when the heat source output remains constant.
Innovation Solution
A cooking heater design where light emitted from a light-emitting unit is transmitted through transparent parts on the top plate, creating a directional light flow visible to the user, indicating the heating source's operation and output level by turning on and off multiple light sources successively in a single direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light-emitting parts emit light in certain luminous areas depending on heat source output, then the heat source output variation can be recognized, but it becomes difficult to recognize whether the heat source is operating and the output level when the output does not vary
Solution Approach 1:
The patent applies periodic action by making light-emitting parts blink alternately in different luminous areas. This blinking pattern provides temporal variation that helps users recognize both the operational state and output level of the heat source, even when the output remains constant. The periodic illumination creates visible changes that convey information about heating status without requiring continuous variation in luminous area.
2Illumination intensity
If a flame pattern is imaged on the side surface of a pan by reflecting transmitted light, then a warm impression is presented to the user, but it becomes difficult for visually impaired users to recognize the flame pattern
Solution Approach 1:
The patent segments the light emission into multiple distinct luminous areas that blink alternately, rather than presenting a continuous flame pattern. This segmentation creates discrete, easily distinguishable light zones that are simpler for visually impaired users to detect and interpret, while still conveying heating information effectively.
Solution Approach 2:
The patent uses variations in luminous area and blinking patterns rather than relying on color representation of flames. This approach provides tactile-like visual cues through brightness and temporal changes, which are more accessible to users with visual impairments while maintaining the warm impression through light emission.
3Loss of information
If multiple light sources are turned on and off successively in a single direction, then a directional light flow is created that is easy to recognize, but the device complexity increases
Solution Approach 1:
The patent divides the light-emitting unit into multiple independent light-emitting parts that can be controlled separately. This segmentation allows each part to be responsible for a specific luminous area, simplifying the control logic for creating directional light flow while maintaining clear operational state visibility.
Solution Approach 2:
The patent uses periodic blinking of light-emitting parts in a predetermined sequence to create directional light flow. This periodic action achieves the desired visual effect through temporal control rather than complex spatial arrangements, reducing device complexity while maintaining information visibility.
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 design allows users to easily recognize the operational state of the heating source, reducing the risk of forgetting to turn off the heater and ensuring appropriate power usage, while also allowing for easy adjustment of heating output.
Implementation Method 1
a light-emitting unit (30) including a plurality of light sources (31A to 31D)
Implementation Method 2
magnetic flux generated by passing an electric current through a metal body, such as a heating coil, disposed in the cooking heater generates an eddy current in a cookware body
Implementation Method 3
The cookware is heated by Joule heat generated by such an eddy current and resistance in the cookware body
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A cooking heater includes a top plate on which cookware is to be placed; a heating source provided under the top plate; a heat zone provided to the top plate to indicate a position at which the cookware is to be placed; a plurality of light sources provided under the top plate and controlled independently of each other; and a transmission part provided in the top plate, located outward of the heat zone, and configured to allow light emitted from the plurality of light sources to be transmitted through the transmission part. A selected one or ones of the plurality of light sources successively emit light while the heating source is being operated, such that the successively emitted light is emitted from the transmission part and flows in a single direction parallel to a surface of the top plate.