Stepped Blower Housing Structure for Axial Thinning and Insulation
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Solution Overview
Problem
Existing blower housing structures with integrated motors face challenges in downsizing the axial dimension due to the need for increased partition height to secure insulation of the connection portion between the winding and lead.
Innovation Solution
The blower housing incorporates an accommodating portion with a recessed second portion for the solder portion, allowing for a reduced axial dimension of the inner wall portion, which fixes the conductive wire and enhances retention of the solder portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the partition height is increased to secure insulation of the connection portion, then the insulation performance is improved, but the axial dimension of the housing increases
Solution Approach 1:
The patent transitions from a single-level partition structure to a multi-level stepped structure with different heights. The first partition has a first height and the second partition has a second height greater than the first height, creating vertical dimensionality variation. This allows the connection portion to be positioned at different vertical levels, providing sufficient insulation clearance without uniformly increasing the overall axial dimension of the housing.
Solution Approach 2:
The patent applies different partition heights at different locations within the housing. The first partition (with smaller height) is positioned where less insulation clearance is needed, while the second partition (with greater height) is positioned where the connection portion requires more insulation clearance. This localized differentiation optimizes the balance between insulation performance and compact axial dimension.
2Length of stationary object
If the housing is thinned in the axial direction, then the size of the blower is reduced, but the insulation of the connection portion cannot be secured
Solution Approach 1:
By introducing a stepped partition structure with varying heights in the vertical direction, the patent creates differentiated insulation zones. The taller second partition provides sufficient insulation clearance for the connection portion while the overall axial dimension remains compact due to the shorter first partition in other areas. This dimensional variation allows thinning the housing while maintaining necessary insulation.
Solution Approach 2:
The patent provides localized insulation enhancement at the second partition where the connection portion is positioned, while other areas maintain compact dimensions through the shorter first partition. This localized quality differentiation ensures insulation reliability at critical points without compromising the overall compactness of the housing.
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 enables the blower housing to be thinned in the axial direction while maintaining insulation and accommodation performance, thereby downsizing the blower itself.
Implementation Method 1
a solder portion where conductive wires including the winding are soldered
Data Source
AI summary
A housing of a blower includes an accommodating portion accommodating a winding of a stator of a motor and a solder portion radially outward of an opening accommodating the stator. The accommodating portion includes: a bottom surface and an inner wall. The bottom surface includes: a first portion where a conductive wire is placed, and a second portion where the solder portion is placed. The second portion is recessed deeper than the first portion. A dimension in an axial direction from the first portion to an upper surface of the inner wall is greater than a thickness of the conductive wire in the axial direction and less than a thickness of the solder portion in the axial direction. A dimension in the axial direction from the second portion to the upper surface of the inner wall is greater than the thickness of the solder portion in the axial direction.