Range Hood with Rail-Guided Height Adjustment to Prevent Tilting
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Solution Overview
Problem
Conventional range hoods have a fixed exhaust position relative to the stove, which limits their suction power and is not well-suited for all cooking types, and existing adjustable hoods with rack and gear systems often tilt during movement, affecting smooth operation.
Innovation Solution
A range hood design featuring a case with slidably connected rails in grooves within the body, allowing smooth adjustment of the blower height relative to the stove, coupled with a driving unit and control panel for precise control and automatic speed adjustment based on detected height and smoke levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the exhaust position is fixed relative to the stove, then the structure is simple, but the suction power cannot be effectively exerted for different cooking types
Solution Approach 1:
The patent applies the dynamics principle by making the case and blower height adjustable relative to the stove. The case can be moved vertically along guide rails, and the blower height can be adjusted independently, transforming a static fixed-position structure into a dynamic adjustable one. This allows the exhaust position to adapt to different cooking types and stove configurations, resolving the contradiction between adaptability and structural simplicity.
2Ease of operation
If a rack and gear system is used to adjust the air duct height, then the suction position can be adjusted, but the air duct tilts during movement affecting smooth operation
Solution Approach 1:
The patent extracts and eliminates the problematic rack and gear system from the design. Instead of using a mechanical transmission system that causes tilting, the invention directly moves the case along guide rails using a linear actuator or motor. This removes the intermediate mechanical components that were causing the tilting issue, thereby improving both the smoothness of movement and horizontal stability.
Solution Approach 2:
The patent introduces guide rails as an intermediary structure to enable smooth vertical movement of the case. The guide rails provide a constrained path that prevents lateral movement and tilting, while allowing vertical adjustment. This intermediary mechanism resolves the contradiction by providing a stable guide structure that maintains horizontal stability during height adjustment.
3Adaptability or versatility
If the blower height is fixed, then the device is simple, but the suction force cannot be optimized for different cooking styles
Solution Approach 1:
The patent applies dynamics by making the blower height adjustable relative to the case and stove. The blower can be positioned at different heights within the case to optimize suction for different cooking styles. This dynamic adjustment capability allows the system to adapt to various cooking requirements while maintaining a relatively simple overall structure through modular design.
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 efficient smoke and grease particle removal by adjusting suction force and speed according to cooking style and smoke levels, ensuring stable and effective operation without tilting, thus improving cooking experience.
Implementation Method 1
a blower (6) or a fan...so as to suck smoke via the suction path (32)
Data Source
AI summary
A range hood includes a body having a space formed therein, and multiple grooves are formed in the inside of the space. The body includes an opening in the underside thereof. The opening communicates with the space. A case includes multiple rails which are slidably located in the grooves. A frame is located in the space and includes a blower. A driving unit is located in the space and connected to the case so as to lift and lower the case by moving the rails along the grooves.