Split-Type Range Hood Duct Sleeve Design for Airtight Fume Discharge
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Solution Overview
Problem
The existing split-type range hood design suffers from poor airtightness between the duct sleeve and the range hood body, leading to inefficient discharge of cooking fumes and potential oil leakage, which contaminates the range hood.
Innovation Solution
The design incorporates a first and second duct sleeve with flanges on the smoke collecting box and exhaust motor hull, respectively, ensuring tight fittings and eliminating gaps for improved airtightness, preventing fume leakage and oil contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a duct sleeve is fixed to the range hood body by screws only, then the installation is simple, but a gap is easily formed between the duct sleeve and the range hood body, resulting in poor airtightness
Solution Approach 1:
The patent combines multiple sealing mechanisms (screws, sealing rings, and sealing grooves) into a unified connection structure. The duct sleeve integrates both mechanical fastening (screws) and sealing functions (sealing rings in grooves) to simultaneously achieve simple installation and reliable airtightness, resolving the contradiction between ease of manufacture and reliability.
2Ease of operation
If a gap exists between the duct sleeve and the range hood body, then the structure allows for easy assembly, but cooking fumes leak out from the gap, resulting in lower discharge efficiency
Solution Approach 1:
The patent introduces sealing rings as intermediary elements between the duct sleeve and the range hood body. These sealing rings fill the gaps that would otherwise allow fume leakage, maintaining easy assembly while preventing fume escape, thus resolving the contradiction between assembly ease and discharge efficiency.
3Device complexity
If a gap exists between the duct sleeve and the range hood body, then the structure is simpler to manufacture, but oil leakage occurs from the gap, resulting in contamination of the range hood body
Solution Approach 1:
The patent employs flexible sealing rings (thin film structures) that can deform to fit the connection interface between the duct sleeve and the range hood body. These flexible sealing elements effectively block oil leakage paths while adding minimal structural complexity, resolving the contradiction between structure simplicity and prevention of harmful factors.
Data Source
AI summary
The split-type range hood includes a range hood body, an exhaust motor, an air duct, a first duct sleeve, and a second duct sleeve. The range hood body includes a chassis and a smoke collecting box. The chassis has an air intake opening, the smoke collecting box is disposed on the chassis, and the smoke collecting box covers the air intake opening. The smoke collecting box has an air outlet opening, and the air outlet opening of the smoke collecting box is in fluid communication with the air intake opening of the chassis. A first flange is formed on a periphery of the air outlet opening of the smoke collecting box. The exhaust motor is disposed outside of the range hood body. The first duct sleeve is sleeved on the first flange, and the first duct sleeve is sleeved on one end of the air duct.