Switch box for a cooktop appliance
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Solution Overview
Problem
Conventional switch boxes for cooktops require substantial thermal insulation due to their metal construction, increasing cost and complexity while attempting to protect switches from excessive temperatures.
Innovation Solution
A switch box design featuring a top wall and first barrier wall with an internal chamber, defining an air-insulation channel between the first and second barrier walls, which houses the switch and eliminates the need for additional insulation layers by using a plastic material and an outer fiberglass insulation layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal switch box is used, then the switch box provides structural strength and durability, but it requires substantial thermal insulation layers to protect switches from excessive temperatures, increasing cost and complexity
Solution Approach 1:
The patent replaces the conventional metal switch box with a plastic switch box. Plastic is a cheaper, lighter material that inherently provides thermal insulation, eliminating the need for additional insulation layers (fiberglass, metal spacers, reflective aluminum skin) that are required with metal construction. This substitution resolves the contradiction by maintaining structural adequacy while removing the complexity of multiple insulation layers.
2Temperature
If substantial thermal insulation layers are added to a metal switch box, then switch temperature protection is improved, but the overall cost and manufacturing complexity increase
Solution Approach 1:
The patent changes the material parameter of the switch box from metal to plastic. Plastic has inherently lower thermal conductivity than metal, which naturally limits heat transfer to the switches. This material parameter change provides adequate temperature protection without requiring additional insulation layers, thereby simplifying manufacturing and reducing costs.
3Reliability
If multiple insulation layers (fiberglass, metal spacer, reflective aluminum skin) are used, then thermal protection is adequate, but the switch box design becomes more complex and costly
Solution Approach 1:
The patent extracts and removes the multiple insulation layers (fiberglass layer, metal spacer, reflective aluminum skin) from the switch box design. By using plastic as the primary material, the invention eliminates these additional components while maintaining adequate thermal protection, thereby reducing structural complexity and cost.
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 design effectively maintains switch temperatures within a safe range without the need for additional insulation layers, reducing complexity and cost while maintaining effective thermal protection.
Implementation Method 1
A second barrier wall is disposed adjacent and being spaced from the first barrier wall to thereby define an air-insulation channel therebetween
Data Source
AI summary
A switch box for housing a switch underneath a cooktop is disclosed. The switch is connected to a control member accessible above the cooktop to accept user inputs. The switch box has an air-insulation channel defined between first and second spaced-apart barrier walls. In desirable embodiments the first and second barrier walls are integrally formed with other components of the switch box from plastic as a single-piece part.