Electric Compressor Soundproof Cover Fixing Against Vibration Shift
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Solution Overview
Problem
Elastically deformable soundproof covers for electric compressors easily move relative to the housing due to vibrations, leading to ineffective sound absorption and noise reduction.
Innovation Solution
A soundproof cover with a cylindrical shape and overlapping portions that have insertion holes, secured by shafts and pressing parts, which elastically deform to attach firmly to the housing, preventing movement and enhancing sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a soundproof cover made from elastically deformable sound absorbing material is used, then sound absorption performance is improved, but the cover easily moves relative to the housing due to vibration
Solution Approach 1:
The soundproof cover is divided into a covering portion and an overlapping portion, with the overlapping portion having insertion holes that receive shafts. This segmentation allows the cover to be securely attached to the housing while maintaining the sound absorption properties of the elastically deformable material.
Solution Approach 2:
The shafts are inserted into the insertion holes of the overlapping portion before the cover is fully attached to the housing. This preliminary action secures the cover in position, preventing vibration-induced movement while allowing the elastic material to maintain its sound absorption capability.
2Object-affected harmful factors
If the soundproof cover is entirely made from elastically deformable material, then sound absorption is enhanced, but the cover may be removed from the housing
Solution Approach 1:
The soundproof cover has different structural qualities in different regions: the covering portion is made entirely of elastically deformable sound absorbing material for optimal sound absorption, while the overlapping portion contains insertion holes that receive rigid shafts to provide secure attachment and prevent removal from the housing.
3Object-generated harmful factors
If a soundproof cover is used to cover the housing, then noise reduction is achieved, but vibration causes the cover to move and detach
Solution Approach 1:
The shafts act as intermediary elements between the housing and the soundproof cover. The shafts extend from the housing through the insertion holes in the overlapping portion, providing a mechanical connection that stabilizes the cover's position while allowing the elastic material to absorb sound and vibration.
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
The solution effectively reduces noise by ensuring the soundproof cover remains attached to the housing, maintaining sound absorption performance and preventing abrasion, thus improving noise reduction in electric compressors.
Implementation Method 1
a pressing part that presses a part of the overlapping portion around the insertion hole toward the housing so as to elastically deform the overlapping portion and the covering portion
Implementation Method 2
a soundproof cover that is made from a sound absorbing material being elastically deformable, the soundproof cover covering the outer circumferential surface of the housing
Data Source
AI summary
An electric compressor includes a compression part, an electric motor, an inverter, a housing that has an outer circumferential surface, and a soundproof cover that covers the outer circumferential surface of the housing. The soundproof cover has a covering portion that covers the outer circumferential surface of the housing and an overlapping portion that overlaps the covering portion in a radial direction of the housing. The overlapping portion and the covering portion each have an insertion hole. The housing is provided with a shaft that extends from the outer circumferential surface of the housing and that is inserted into the insertion hole, and a pressing part that presses a part of the overlapping portion around the insertion hole toward the housing so as to elastically deform the overlapping portion and the covering portion. The soundproof cover is attached to the housing with the shaft and the pressing part.