Fan system, range hood equipped with the same, and mounting method thereof
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Solution Overview
Problem
Existing range hood fan systems face challenges in motor mounting and disassembly, leading to vibration issues and complex maintenance processes, particularly in horizontal designs where the motor is prone to loosening and requires complicated disassembly procedures.
Innovation Solution
The fan system incorporates a motor mounting mechanism with an anti-loose ring and nylon self-locking nut, allowing the motor to be securely fixed from the air inlet, and a flow guide device that can be easily assembled and disassembled by rotating it into place, ensuring safety and convenience during assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor is fixed on the box or the upper portion of the rear cover of the volute using conventional mounting methods, then the motor can be secured, but the motor requires complicated disassembly procedures and is prone to loosening under vibration
Solution Approach 1:
The volute is divided into separable components (front cover, rear cover, and mid-section) that can be detached from each other. The motor is mounted on the rear cover which can be separated from the front cover, allowing motor access without complete disassembly. This segmentation enables independent motor maintenance while maintaining overall structural integrity.
Solution Approach 2:
The motor mounting structure is extracted as a separate functional unit on the rear cover. The rear cover with mounted motor can be removed as a unit from the volute assembly, allowing motor access and maintenance without disassembling the entire volute or impeller assembly. This extraction simplifies the maintenance process significantly.
2Reliability
If the volute is designed as a complete assembled structure for motor mounting, then motor fixation is stable, but the disassembly requires removing 14 screws and changing machine placement mode
Solution Approach 1:
The volute is segmented into modular components (front cover, rear cover, mid-section) connected by fewer fasteners. The rear cover can be detached independently, reducing the number of screws that need to be removed from 14 to just the connection screws between modules. This segmentation dramatically reduces disassembly time and complexity.
Solution Approach 2:
The volute structure transitions from a static complete assembly to a dynamic modular structure where components can be selectively assembled and disassembled. The mid-section connects front and rear covers through simple fastening mechanisms that allow quick separation, enabling the structure to adapt between stable operation and easy maintenance states.
3Reliability
If screws are located in different directions for motor fixation, then the motor can be secured from multiple angles, but the placement mode of the whole machine needs to be changed during disassembly
Solution Approach 1:
The motor mounting structure on the rear cover uses an asymmetric arrangement of fasteners optimized for the rear cover geometry. The screws are positioned to match the rear cover's structural features rather than being symmetrically distributed, allowing secure fixation while maintaining consistent access from the rear side only, eliminating the need to change machine placement mode during disassembly.
4Ease of manufacture
If the motor is placed from the air inlet of the volute, then the motor can be mounted vertically, but the motor screws are easy to loosen under working conditions
Solution Approach 1:
The motor mounting approach transitions from vertical placement through the air inlet to horizontal placement on the rear cover. This dimensional change in mounting orientation allows the motor to be secured with screws positioned to resist vibration forces more effectively, while maintaining ease of access for installation and maintenance.
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
This solution enhances motor stability and simplifies maintenance by preventing vibration-induced loosening and streamlining the assembly and disassembly processes, while also allowing for flexible air discharge modes without compromising airtightness.
Implementation Method 1
the motor convert electric energy into rotation mechanical energy to drive the impeller to rotate so as to provide energy
Implementation Method 2
When the impeller rotates, a negative-pressure suction force is generated in the center of the fan, so that oil fume under the range hood is sucked into the fan
Data Source
AI summary
A fan system is provided, which includes a volute having a front cover, a rear cover and an annular wall connected between the front cover and the rear cover; an impeller disposed inside the volute, and a motor; the front cover has an air inlet facing downward in the state when the fan system is mounted; the motor includes a motor body and an edge; the edge is connected to the rear cover at the side of the rear cover facing the air inlet. A range hood equipped with the fan system and a mounting method for a flow guide device of the range hood are provided.