Range hood having an internal circulation filter for cooking fumes
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Solution Overview
Problem
Existing range hoods primarily focus on smoke exhaust, leading to outdoor pollution, and lack energy-saving and environmental protection features, with internal exhaust types being rare and inefficient in heat management and filtration, causing indoor temperature issues and appliance performance reduction.
Innovation Solution
A range hood with an internal circulation filter using liquid to separate and filter cooking fumes, employing a one-way air curtain for internal circulation and heat absorption, eliminating the need for external pipelines and reducing waste heat, featuring a simple and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If external exhaust type range hoods are used to directly exhaust smoke into the atmosphere, then smoke removal efficiency is improved, but outdoor air pollution and secondary pollution from oil and smoke occur
Solution Approach 1:
The patent converts the harmful cooking smoke and waste heat into a beneficial internal circulation system. Instead of discharging pollutants outdoors, the system recycles the smoke and heat within the kitchen space after filtration, transforming a harmful external exhaust problem into a beneficial internal environmental control system that reduces outdoor pollution while maintaining smoke removal effectiveness
Solution Approach 2:
The patent discards only the harmful oil and smoke particles through filtration while recovering and recycling the breathable air and waste heat within the kitchen. The filtration device separates contaminants from the air stream, allowing the cleaned air to be recirculated internally, thus discarding pollutants and recovering useful resources simultaneously
2Object-generated harmful factors
If internal exhaust type range hoods with purification treatments such as activated carbon and centrifugal separation are used, then outdoor pollution is reduced, but device structure becomes complicated, cost increases, and service life decreases
Solution Approach 1:
The patent extracts and removes only the essential filtration function from the complex multi-component purification systems. By using a simple liquid absorption mechanism instead of multiple mechanical components like activated carbon filters and centrifugal separators, the design achieves effective smoke and odor removal while dramatically simplifying the device structure and reducing cost
Solution Approach 2:
The patent employs a hydraulic/liquid-based filtration mechanism where liquid absorbs and captures oil particles, smoke, and odors from the air stream. This liquid absorption approach replaces complex mechanical and chemical filtration systems with a simpler fluid-based solution that is easier to maintain and more cost-effective
3Object-generated harmful factors
If internal exhaust type range hoods without heat absorption or cooling functions are used, then smoke and odor are filtered, but waste heat accumulates in the kitchen causing temperature increase and reduced appliance performance
Solution Approach 1:
The patent makes the range hood system multi-functional by combining smoke filtration, odor removal, and heat absorption/cooling functions into a single integrated system. The liquid in the filtration device simultaneously captures pollutants and absorbs waste heat, transforming a single-function filtration device into a multi-functional environmental control system that addresses both air quality and thermal comfort
Solution Approach 2:
The patent converts the harmful waste heat that would otherwise accumulate in the kitchen into a beneficial cooling effect. The liquid absorption medium absorbs the excess thermal energy from cooking, effectively using the heat absorption capability to cool the kitchen environment and improve appliance performance while maintaining filtration functions
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 solution effectively purifies cooking fumes, absorbs excess heat, reduces kitchen temperature, and extends the range hood's service life while minimizing environmental impact and maintenance, providing a cleaner and more efficient indoor air discharge.
Implementation Method 1
the adoption of liquid for filtering the oil smoke can absorb heat and reduce the temperature of waste heat generated by cooking in a kitchen and then discharge the waste heat into a room, and the temperature of the kitchen is effectively reduced
Implementation Method 2
the cooking fumes sucked by the range hood is filtered by liquid, and is separated by liquid, oily components are mixed into the liquid
Data Source
AI summary
A range hood having an internal circulation filter for cooking fumes comprises a back cover (1). A suction block (2) is provided inside the back cover (1), and a blower (3) provided inside the suction block (2) is used to achieve adsorption of cooking fumes. The back cover (1) is further provided with a filtration device (4) in communication with an air outlet of the blower (3), and used to filter the cooking fumes. An internal circulation block (5) is connected and sealed to an air outlet end of the filtration device (4), so as to achieve internal circulation of filtered gasses. The range hood having an internal circulation filter for cooking fumes features a simple structure, and extends the service life of a range hood. The invention effectively absorbs excess heat in a kitchen, thereby lowering the internal ambient temperature of the kitchen.