Household oven comprising arrangement of lower heating element
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Solution Overview
Problem
Existing household ovens lack a secure and simple method to mount a shield for protecting the lower heating element from thermal insulation, which can lead to inefficient heat distribution and potential safety hazards during transport and enamelling processes.
Innovation Solution
A shield is mounted using a carrier welded to the oven's bottom wall, with wire mounts and a flange providing a form-locking and force-locking joint, ensuring secure attachment and maintaining a constant distance from the heating element, and is designed for easy detachment during transport and enamelling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a shield is mounted for protecting the lower heating element from thermal insulation, then heat distribution efficiency is improved, but the complexity of device assembly increases
Solution Approach 1:
The shield is divided into multiple segments that can be separately positioned and attached to the carrier, allowing for simplified assembly while maintaining effective heat distribution coverage
Solution Approach 2:
A carrier is introduced as an intermediary component between the shield and the oven body, simplifying the mounting process by providing a pre-assembled structure that can be easily attached to the lower heating element area
2Reliability
If a secure mounting method is used for the shield, then protection reliability is improved, but ease of detachment during transport decreases
Solution Approach 1:
The mounting system transitions from a permanent fixed connection to a dynamic, reversible connection using detachable fastening elements, allowing the shield to be securely mounted during operation and easily detached during transport
Solution Approach 2:
The shield can be temporarily removed (discarded from the mounted position) during transport and reloading operations, then recovered and remounted for continued protection and heat distribution functionality
3Manufacturing precision
If the shield maintains a constant distance from the heating element, then heat distribution uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The carrier is pre-formed with integrated positioning elements that automatically establish the correct constant distance between the shield and heating element during assembly, eliminating the need for precise manual positioning and reducing manufacturing complexity
Data Source
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AI summary
The present invention relates to a household appliance, in particular to a household oven the surface thereof is protected by enamel, comprising a body with a door opening, an upper heating element arranged in the area of the top wall and inside said body, and a lower heating element arranged in the area of the bottom wall and outside said body. The shield (9) of the lower heating element (8) is equipped with at least two wire mounts (11', 11'') extending on the plane of the shield (9) and in the direction from said back wall (5) towards the front wall (6), which are detachably connected to said lower heating element (8) by means of a series of fasteners (13), whereby a holding plate (14) is provided on the side facing said back wall (5) and at a distance from said shield (9), which holds the free ends of the lower heating element (8) at a constant distance from each other, while at the same time being held by means of said carrier (10) in the assembled state of the household oven.