Motor Casing Rib Structure to Block Water Entry in Blowers
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Solution Overview
Problem
Existing blowers allow water to enter the motor compartment, leading to potential damage and malfunction.
Innovation Solution
A blower design featuring a motor casing with a cylindrical part and flanged rib extending outward in the radial direction, along with an outer circumferential rib, to block water entry into the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the motor casing has a simple cylindrical structure, then the manufacturing is easy, but water can enter the motor compartment
Solution Approach 1:
The motor casing is segmented into multiple functional parts: a cylindrical base portion, a bell-shaped portion, and a flange portion with radial ribs. This segmentation allows each part to serve specific purposes - the cylindrical part provides structural support, the bell-shaped part guides water away, and the flange with ribs creates water barriers, thereby protecting the motor while maintaining manufacturability through modular design
Solution Approach 2:
The invention adds a radial dimension to water protection by extending flanged ribs outward from the cylindrical casing in the radial direction. This creates multiple elevated barriers that prevent water from reaching the motor along the radial path, transforming a simple cylindrical structure into a multi-dimensional water defense system without significantly complicating manufacturing
2Reliability
If the motor casing includes flanged ribs extending radially outward, then water entry is suppressed, but the device complexity increases
Solution Approach 1:
The flanged ribs are merged with the bell-shaped portion of the motor casing, forming an integrated structure where the ribs extend continuously from the casing body. This merging reduces the number of separate components needed, simplifies assembly, and maintains the water protection function while minimizing the increase in device complexity
Solution Approach 2:
The flanged ribs serve multiple functions simultaneously: they act as water barriers to prevent water entry, provide structural reinforcement to the motor casing, and create mounting surfaces for securing the blower to other components. This multi-functionality reduces the need for additional protective components, thereby limiting the increase in device complexity
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
Effectively prevents water from entering the motor compartment, enhancing blower reliability and reducing maintenance needs.
Implementation Method 1
a centrifugal fan connected to the motor shaft and rotated about an axis of the motor shaft by output of the motor
Data Source
AI summary
A blower includes: a motor including a motor shaft; a centrifugal fan connected to the motor shaft and rotated about an axis of the motor shaft by output of the motor; and a motor casing including a cylindrical part covering the motor from a side opposite to the centrifugal fan in an axial direction. The motor casing includes, outside an outside surface of the cylindrical part, a flanged rib extending outward in the radial direction of the axis.