Hermetic Compressor Suction Pipe Segmentation for Cooling Efficiency
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Solution Overview
Problem
Conventional hermetic compressors experience reduced efficiency due to the mixing of low-temperature cooling medium with high-temperature medium within the hermetic container, leading to a decrease in the circulating amount of cooling medium.
Innovation Solution
A hermetic compressor design featuring a suction pipe with a large diameter part and a small diameter part, where the inlet opening of the suction muffler closely faces the large diameter part of the suction pipe, allowing for the introduction of low-temperature cooling medium to the compressing mechanism, thereby enhancing refrigerating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the inlet opening of the suction muffler is disposed closely facing the suction pipe, then the cooling medium can be drawn in with keeping its low temperature, but the cooling medium mixes with high temperature cooling medium in the hermetic container, causing the temperature to increase and reducing the circulating amount
Solution Approach 1:
The suction pipe is divided into two sections with different diameters: a large diameter part that opens into the hermetic container and a small diameter part connected to the external refrigerating system. This segmentation allows the cooling medium to be drawn in through the large diameter part while maintaining a separate flow path that prevents mixing with high-temperature medium inside the container, thus preserving the low temperature of the incoming cooling medium and maintaining higher circulating amount.
2Device complexity
If the suction pipe has a uniform diameter, then the structure is simple, but the cooling medium temperature increases due to mixing with high temperature medium, reducing efficiency
Solution Approach 1:
The suction pipe is designed with non-uniform diameter, where the part opening into the hermetic container has a larger diameter and the part connected to the external refrigerating system has a smaller diameter. This local variation in geometry creates different flow characteristics in different sections, allowing the cooling medium to enter the hermetic container through the large diameter part without mixing significantly with the high-temperature medium already present, thereby maintaining lower temperature and higher efficiency while still using a relatively simple single-piece structure.
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 design significantly increases refrigerating capacity and efficiency by ensuring a continuous flow of low-temperature cooling medium into the compressor, while maintaining a balanced and stable cooling medium stream, thus optimizing the compressor's performance.
Implementation Method 1
Suction pipe (101) includes large diameter part (102) which opens into inside of hermetic container (104) and small diameter part (103) connected to external refrigerating system
Implementation Method 2
inlet opening (117) which communicates muffling space (115) with inside space of hermetic container (104) and faces closely opening (105) of large diameter part (102) of suction pipe (101)
Data Source
AI summary
A hermetic compressor has a hermetic container, a suction pipe, a compressing mechanism and a suction muffler. The suction pipe includes a large diameter part opening to an inside of the hermetic container and a small diameter part connected to an external refrigerating system, and the suction pipe is fixed with the hermetic container. The compressing mechanism is accommodated inside the hermetic container. The suction muffler forms a muffling space communicated with the compressing mechanism. The suction muffler is provided with an inlet opening which communicates the muffling space with an inside space of the hermetic container and faces closely an opening of the large diameter part of the suction pipe.