Pull-Out Guide Partial Microwave Shielding for Oven Drawer Slides
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Solution Overview
Problem
Existing pull-out guides for microwave cooking appliances and industrial heating ovens face challenges with microwave radiation absorption, leading to undesirable heating and potential damage, as well as the risk of plasma discharges, due to inadequate shielding designs that require additional space and complicate cleaning.
Innovation Solution
A pull-out guide with partial microwave shielding, where the running rail is only completely shielded when retracted, utilizing two-part shielding designs such as interlocking U-shaped profile rails or strip-shaped plates that overlap to form a microwave-tight seal without obstructing extension or complicating mounting, ensuring the shielding is eliminated when the guide is extended.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the running rail is completely shielded by a closed hollow cross-section profile, then microwave radiation protection is improved, but the drawer slide cannot be directly supported in the movement area and requires additional guide elements
Solution Approach 1:
The shielding is divided into two separate parts: a first part attached to the housing rail and a second part attached to the running rail. These segmented shielding parts can be positioned independently, allowing the running rail to be directly supported in the movement area while maintaining microwave protection when retracted.
Solution Approach 2:
The shielding configuration is made dynamic by attaching one shielding part to the movable running rail. When the running rail extends, the shielding parts separate and the shielding effect is reduced; when retracted, the shielding parts come together to provide complete protection, automatically adapting to the operational state.
2Reliability
If a guide roller is used to guide the drawer slide at the front, then the drawer slide can be supported, but additional space is required and full-extension design is precluded
Solution Approach 1:
The shielding function and support function are merged into a single integrated structure. The running rail itself serves as both the support element and, when combined with the first shielding part, as part of the microwave shielding system, eliminating the need for separate guide rollers.
3Ease of manufacture
If the guide rail is exposed without shielding, then cleaning is easier, but microwave radiation can directly reach critical components causing heating and plasma discharges
Solution Approach 1:
The shielding is applied selectively rather than completely enclosing the running rail. The first shielding part is attached to the housing rail to provide localized protection for critical components, while leaving other areas open for cleaning accessibility. This creates different shielding qualities in different locations based on specific needs.
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 partial shielding design effectively prevents microwave radiation from reaching critical components while allowing for easy extension and maintenance, avoiding overheating and plasma risks, and maintaining accessibility for mounting without additional external guide elements.
Implementation Method 1
a microwave shield (10) for shielding the drawer slide from microwave radiation
Data Source
Figure 1a~1b
Figure 1c
Figure 2a~2b
AI summary
The invention relates to a pull-out guide for a microwave cooking appliance or an industrial oven, having a body rail (1) and a running rail (2), that is able to move relative thereto, for depositing a carrier, and a microwave shield (10) for shielding the pull-out guide from microwaves. The pull-out guide is characterized in that the running rail (2) is only partially shielded. The invention also relates to a microwave cooking appliance or to an industrial oven having at least one such pull-out guide.