Domestic Microwave Rotary Antenna for Field Pattern Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing microwave ovens lack a compact and structurally simple way to adjust microwave distribution in the cooking chamber for both uniform and targeted uneven heating.
Innovation Solution
A rotating antenna with at least two blades, adjustable in relative angle by a motor, allows for selective generation of various microwave field distributions within the cooking chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional stationary antenna is used in microwave ovens, then the structure is simple, but the microwave field distribution cannot be adjusted for different heating requirements
Solution Approach 1:
The patent applies the dynamics principle by making the antenna rotatable about its axis and allowing the blades to be tilted relative to the rotation axis. This dynamic configuration enables the antenna to generate different microwave field distributions (uniform or targeted uneven heating) by adjusting the rotation angle and blade tilt angle, thereby resolving the contradiction between adaptability and structural complexity.
2Adaptability or versatility
If multiple separate rotating antennas are used to achieve various heating patterns, then heating versatility is improved, but the device becomes more complex and occupies more space
Solution Approach 1:
The patent applies the universality principle by designing a single rotating antenna with multiple functional capabilities. The antenna can generate both uniform heating patterns and targeted uneven heating patterns by adjusting its rotation angle and blade tilt angle, eliminating the need for multiple separate antennas and thus reducing space occupation while maintaining heating versatility.
Solution Approach 2:
The dynamic adjustment of blade tilt angles during rotation enables the single antenna to simulate the effects of multiple fixed antennas, providing various heating patterns without requiring multiple physical antenna units, thereby reducing the overall space occupation.
3Manufacturing precision
If the antenna structure is made complex to achieve precise microwave distribution control, then heating precision is improved, but the design effort and structural complexity increase
Solution Approach 1:
The patent achieves precise microwave field distribution control through dynamic adjustment of rotation angles and blade tilt angles, rather than through complex static structures. This dynamic approach allows for precise control of heating patterns while maintaining relatively simple antenna geometry, thereby improving manufacturing precision without excessive design complexity.
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
Enables a wide range of microwave field distributions for uniform or targeted uneven heating, adapting to different food types and heating patterns with minimal design effort and space requirements.
Implementation Method 1
a rotating antenna with at least two blades rotatable about a common axis of rotation
Data Source
Figure 1~2A
Figure 2B
Figure 3~4
AI summary
The invention relates to a domestic microwave device (1) having a rotary antenna (2) with at least two wings (3, 4) rotatable about a common rotation axis (R), wherein a relative angle (Th) between at least two of these wings (3, 4) is adjustable in motor-driven fashion about the rotation axis (R). The invention also relates to a method for operating a domestic microwave device (1) which is equipped with a rotary antenna (2) having at least two wings (3, 4), wherein, during operation of the domestic microwave device (1), a relative angle (Th) between at least two of the wings (3, 4) is adjusted in motor-driven fashion. The invention is particularly advantageously applicable to cooking appliances having a microwave function.