Refrigeration cycle apparatus
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Solution Overview
Problem
Existing refrigeration cycle apparatuses face challenges in suppressing vibration-induced stress on refrigerant pipes due to the displacement between refrigeration-cycle constituent components and electric components, especially when a double anti-vibration structure is employed, leading to potential fatigue fractures and refrigerant leakage.
Innovation Solution
The apparatus incorporates a vibration transmission suppressing portion, which includes a refrigerant cooling pipe fixed to a heat transfer plate and connected to the housing via elastic members, effectively reducing vibration transmission from refrigeration-cycle components to the refrigerant cooling pipe, thereby minimizing stress and preventing fatigue fractures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a double anti-vibration structure is employed to suppress vibration transmission, then low-noise performance is improved, but space in the housing is decreased and electric components cannot be adequately cooled
Solution Approach 1:
The patent divides the housing into multiple spatial zones: the lower portion contains the base with vibration-prone components (compressor and refrigeration-cycle constituent components) mounted on anti-vibration members, while the upper portion houses electric components that require cooling. This segmentation allows independent optimization of vibration suppression and thermal management for each zone.
Solution Approach 2:
The patent introduces a refrigerant cooling pipe as an intermediary thermal management device. The cooling pipe, through which refrigerant flows, is positioned to provide cooling air to the electric components in the upper housing portion. This intermediary system enables effective cooling without requiring direct thermal coupling that would compromise vibration isolation.
2Device complexity
If electric components are fixed to the housing upper portion for space management, then housing space is optimized, but displacement between refrigeration-cycle constituent components and electric components generates stress on connecting pipes
Solution Approach 1:
The patent introduces a vibration transmission suppressing portion as an intermediary element in the refrigerant piping system. This portion is disposed between the refrigeration-cycle constituent component (fixed to the vibrating base) and the refrigerant cooling pipe (fixed to the stationary housing upper portion). The vibration transmission suppressing portion acts as a buffer that absorbs relative displacement and prevents stress transmission to the connecting pipes.
Solution Approach 2:
The patent changes the mechanical parameters of the piping system by introducing a flexible or compliant section (vibration transmission suppressing portion) that can accommodate relative motion. This allows the rigid piping connected to stationary components to remain stress-free while accommodating the vibration and displacement of components mounted on the anti-vibration base.
3Object-affected harmful factors
If refrigeration-cycle constituent components are fixed to the base with compressor, then vibration is suppressed, but displacement between these components and electric components fixed to housing generates stress on refrigerant pipes
Solution Approach 1:
The vibration transmission suppressing portion serves as a protective intermediary between the vibrating refrigeration subsystem and the stationary cooling subsystem. It maintains reliable pipe connections by absorbing the relative displacement that occurs when the base and its mounted components vibrate, preventing stress concentration and potential connection failures.
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 solution reduces vibration energy transmitted to the housing, alleviates stress on refrigerant pipes, and enhances the reliability of the refrigeration cycle apparatus by preventing refrigerant leakage and maintaining efficient operation.
Implementation Method 1
The first elastic member is disposed on the base. The compressor is disposed on the base via the first elastic member. The second elastic member is disposed on the bottom member. The base is disposed on the bottom member via the second elastic member.
Implementation Method 2
The refrigerant cooling pipe is fixed to the heat transfer plate and is configured to cool the electric component via the heat transfer plate.
Implementation Method 3
The connecting pipe includes a vibration transmission suppressing portion. The vibration transmission suppressing portion suppresses vibration of the refrigeration-cycle constituent component or the compressor fixed to the base from being transmitted to the refrigerant cooling pipe.
Data Source
AI summary
A refrigeration cycle apparatus includes a compressor, a refrigerant cooling pipe, a refrigerant-cycle constituent component, a connecting pipe and vibration transmission suppressing portion that is disposed on the connecting pipe that connects the refrigeration-cycle constituent component or the compressor and the refrigerant cooling pipe to each other.