Air Conditioner Compressor Fastening Device to Reduce Vibration Noise
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Solution Overview
Problem
Air conditioners used in vehicles, such as mobile homes and caravans, generate noise due to the transmission of compressor forces to the housing, which are not effectively mitigated by existing designs.
Innovation Solution
The air conditioner features a fastening device with a clamping element, guiding element, and stop elements that securely attach the compressor to the housing, distributing vibrations and reducing noise through a mechanical coupling that includes a spring unit and deformable housing materials, allowing for variable and fixed axial distances during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor is fastened directly to the housing bottom, then the compressor is securely mounted, but vibrations are transmitted directly to the housing causing noise
Solution Approach 1:
The patent introduces a fastening device as an intermediary component between the compressor and housing bottom. This device includes a guiding element with stop elements that mediate the connection, allowing secure mounting while controlling vibration transmission. The intermediary structure prevents direct rigid coupling that would transmit noise.
Solution Approach 2:
The patent converts the harmful vibration energy into beneficial damping effects. The spring element and deformable housing bottom material absorb and dissipate vibration energy, transforming the harmful mechanical vibrations into harmless thermal energy through material deformation and elastic damping.
2Strength
If a rigid fastening connection is used, then the compressor is firmly secured, but vibrations are not distributed and noise increases
Solution Approach 1:
The patent changes the mechanical parameters of the fastening connection by introducing elasticity through the spring element and deformability through the housing bottom material. This transforms the rigid connection into a compliant connection that maintains fastening strength while distributing vibrations through controlled deformation.
Solution Approach 2:
The patent employs composite material properties by combining the metal spring element with the deformable housing bottom material (such as polyurethane or foam). This composite approach creates a fastening system that provides both structural strength and vibration damping through the different material characteristics.
3Volume of moving object
If the guiding element length equals the recess height, then the assembly is compact, but the clamping element cannot be properly assembled
Solution Approach 1:
The patent applies preliminary action by designing the guiding element with an intentional length shortfall relative to the recess height. This preliminary design feature allows the clamping element to be easily inserted and assembled without interference, and the remaining space is subsequently filled by the spring element to complete the assembly.
4Manufacturing precision
If the axial distance between stop elements is fixed, then the component positioning is precise, but assembly flexibility is reduced
Solution Approach 1:
The patent applies dynamics by making the axial distance between stop elements variable rather than fixed. The spring element enables the stop elements to adjust their positions dynamically during assembly, providing flexibility for different assembly conditions while maintaining precise positioning once assembled.
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 effectively reduces noise by transmitting compressor vibrations directly to the housing, distributing them, and utilizing elastic components to dampen vibrations, resulting in a quieter operation.
Implementation Method 1
The fastening device has two supporting rings, that the two supporting rings are located at different heights along the clamping element, that the guiding element is located axially along the clamping element between the two supporting rings
Implementation Method 2
at least in the area of the recess, the bottom of the housing is elastically deformable
Data Source
AI summary
Example embodiment relate to an air conditioner. A fastening device fastens a compressor on a bottom of a housing via a mounting component. A clamping element is arranged within a guiding element. The guiding element is arranged in a recess of the bottom of the housing and has a smaller length than the recess. Two stop elements are each associated with a front side of the clamping element, an axial distance between the stop elements being variable in the unassembled state and being fixed in an assembled state.