Air Blower Volute Design for Stable Air Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional exhaust fans with iron volutes suffer from complex installation processes, deformation issues leading to unstable air output, and inaccurate assembly, resulting in high noise and energy inefficiency due to shaded-pole motors.
Innovation Solution
The design features a volute with a plastic or sheet metal shell, a centrifugal wind wheel, and a motor with a starting capacitor, where the motor is mounted on a support beam with a bolt-nut mechanism, facilitating easy assembly and reducing noise and energy consumption, while the volute's design enhances air flow and exhaust volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an iron volute is used, then the structure is simple, but the volute is easy to deform leading to unstable air output
Solution Approach 1:
The patent changes the material parameter of the volute from iron to plastic, fundamentally altering the physical properties. Plastic material eliminates deformation issues while maintaining manufacturing simplicity through injection molding, thus resolving the contradiction between structural simplicity and air output stability.
2Speed
If a shaded-pole motor is used, then the rotation speed is high, but the energy efficiency is high and noise is high
Solution Approach 1:
The patent changes the motor type parameter from shaded-pole motor to capacitor-start motor. This parameter change fundamentally alters the performance characteristics, achieving high rotation speed while simultaneously improving energy efficiency and reducing noise, thus resolving the contradiction.
3Reliability
If the motor is hoisted in the box through the mounting plate, then the motor is secured, but the installation process is complex
Solution Approach 1:
The patent merges the motor mounting structure with the volute body by integrating the mounting plate directly into the volute design. This consolidation eliminates separate mounting components and simplifies the installation process while maintaining reliable motor securing, thus resolving the contradiction between reliability and installation complexity.
4Ease of manufacture
If the iron volute and wind wheel are assembled, then the components are connected, but the assembly accuracy is not accurate
Solution Approach 1:
The patent changes the volute material from iron to plastic, which enables more precise molding and better dimensional stability. This parameter change improves the manufacturing precision of the volute itself, leading to more accurate assembly with the wind wheel while maintaining ease of manufacture through injection molding.
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 configuration simplifies the installation process, reduces noise and energy consumption, and improves the accuracy and efficiency of air output, leading to a more stable and cost-effective exhaust fan solution.
Implementation Method 1
a centrifugal wind wheel, and a motor; the volute comprises an end plate, a side plate extending from an edge of the end plate, and a cavity formed by the end plate and the side plate; the centrifugal wind wheel is disposed in the cavity
Data Source
AI summary
An air blower, including a volute, a centrifugal wind wheel, and a motor. The volute includes an end plate, a side plate extending from an edge of the end plate, and a cavity formed by the end plate and the side plate; the centrifugal wind wheel is disposed in the cavity; the end plate includes an air inlet, and two ends of the side plate are disposed side by side to form an air outlet; the end plate further includes a support beam opposite to the air inlet, and the motor is disposed on the support beam.