Scroll Compressor Pipe Fixing to Reduce Vibration and Breakage Risk
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Solution Overview
Problem
The existing heat source units in air conditioners face issues with noise and pipe breakage due to vibration and excessive stress caused by pressure pulsation and transportation excitation, which are not effectively addressed by current configurations.
Innovation Solution
A heat source unit design that includes a compressor with vertically extending connection portions for suction, discharge, and injection pipes, fixed by a metal pipe fixing member along a straight line, and supported by vibration-proof rubbers to reduce rigid body vibration and stress on pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction pipe, discharge pipe, and injection pipe are connected to the compression chamber, then the compressor can perform gas injection to improve refrigerant circuit performance, but the pipes vibrate due to pressure pulsation causing noise and excessive stress
Solution Approach 1:
A pipe fixing member is introduced as an intermediary component between the pipes and the compressor body. This fixing member rigidly connects the suction pipe, discharge pipe, and injection pipe to suppress vibrations caused by pressure pulsation, thereby reducing noise and excessive stress while maintaining the gas injection function
Solution Approach 2:
The pipe fixing member integrates multiple functions: it serves as both a structural support element and a vibration suppression mechanism. By combining the fixation of multiple pipes (suction, discharge, and injection pipes) into a single integrated component, the design achieves comprehensive vibration control without adding excessive complexity
2Productivity
If the pipes are connected to the compression chamber for gas injection, then compressor performance is improved, but the pipes are subject to excessive force during transportation causing breakage risk
Solution Approach 1:
The pipe fixing member is installed before transportation to rigidly secure the pipes to the compressor body. This preliminary fixation action prevents excessive movement and stress during transportation, eliminating the risk of pipe breakage while maintaining the gas injection capability
Solution Approach 2:
The pipe fixing member acts as a protective structure that cushions the pipes against external forces during transportation. By providing rigid support in advance, it prevents excessive stress accumulation that could lead to pipe breakage
3Object-affected harmful factors
If existing vibration suppression configurations are used, then operation vibration is reduced, but transportation excitation is not addressed
Solution Approach 1:
The pipe fixing member is designed to serve multiple purposes: it suppresses vibrations during operation and provides structural support during transportation. This universal component addresses both operation-related and transportation-related issues simultaneously, eliminating the need for separate vibration suppression and transportation protection systems
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 suppresses rigid body vibration, reduces the risk of pipe breakage, and enhances the reliability of the scroll compressor without increasing production costs, while also addressing noise issues.
Implementation Method 1
a pipe fixing member configured to fix the suction pipe, the discharge pipe, and the injection pipe to each other, and including a vibration-proof rubber
Data Source
AI summary
A heat source unit of a refrigerant cycle apparatus includes a compressor, a pipe, and a fixing member. The compressor includes two or three connection portions of a first connection portion connecting a suction pipe, a second connection portion connecting a discharge pipe, and a third connection portion connecting an injection pipe. The pipe includes a vertical portion. At least a part of the vertical portion extends vertically from each of the two or three connection portions. The fixing member fixes at least two of the vertical portions of two or three of the pipes of the suction pipe, the discharge pipe, and the injection pipe. Each of the connection portions of the pipes fixed by the fixing member is located on a first straight line as seen in a top view.