Suction muffler for a hermetically encapsulated refrigerant compressor
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Solution Overview
Problem
Existing suction mufflers for hermetic refrigeration compressors face issues with gas exchange and sound leakage due to oil drain holes, which reduce efficiency and sound damping effectiveness.
Innovation Solution
The design incorporates siphon segments connecting the damping chambers for oil flow while maintaining gas-tight and sound-tight seals, with an oil drain hole in one chamber to ensure maximum tightness, preventing gaseous refrigerant exchange and sound escape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If oil drain holes are provided in each damping chamber, then oil can be drained from the suction muffler, but gas exchange occurs through the holes and sound can escape, reducing efficiency and sound damping effectiveness
Solution Approach 1:
The suction muffler is divided into multiple damping chambers separated by wall elements. Each chamber can independently drain oil through its own drain hole, allowing segmented oil removal while maintaining gas and sound tightness within each chamber. The segmentation prevents gas exchange between chambers and maintains sound damping effectiveness.
Solution Approach 2:
The wall elements acting as intermediaries between damping chambers provide gas-tight and sound-tight separation. These wall elements with integrated drain holes allow oil passage while blocking gas and sound transmission, serving as mediators that enable oil drainage without compromising the gas-tightness and sound-tightness of the individual chambers.
2Manufacturing precision
If connecting passages are provided between damping chambers for liquid separation, then liquid portions can be separated, but sound can escape through the passages and connecting passages may become blocked
Solution Approach 1:
The function of liquid separation is extracted from the connecting passages and implemented through the floor structure of each damping chamber. The floor acts as a separator for liquid portions, allowing oil to collect and drain independently without requiring sound-tight connecting passages, thereby eliminating sound escape through such passages.
Solution Approach 2:
Instead of using complex connecting passages for liquid separation, the patent uses a simplified floor structure that copies the essential separation function. The floor of each damping chamber serves as a separator, replicating the liquid separation function without the harmful side effects of connecting passages.
3Productivity
If multiple oil drain holes are provided in each damping chamber, then oil drainage is improved, but gas exchange and sound leakage increase, reducing overall tightness
Solution Approach 1:
The oil drainage system is segmented by providing each damping chamber with its own dedicated drain hole rather than multiple holes per chamber. This segmentation allows efficient oil removal from each chamber independently while minimizing the total number of openings, thereby maintaining gas-tightness and sound-tightness of each chamber.
Solution Approach 2:
Each damping chamber is designed with local quality characteristics, including its own drain hole positioned and sized appropriately for that specific chamber's oil accumulation patterns. This localized approach optimizes drainage efficiency for each chamber while maintaining the gas and sound tightness of individual chambers.
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 enhances the gas-tightness and sound-damping capabilities of the suction muffler, leading to a more efficient refrigeration compressor with reduced noise levels.
Implementation Method 1
at least one siphon segment connecting the two floors is disposed in the region of the wall element in order to receive oil in an operating position of the suction muffler, where the at least one siphon segment connects the two damping chambers for the oil to each other in siphon fashion
Implementation Method 2
These mufflers damp the sound based on the well-known Helmholtz principle, i.e., the damping chambers function as resonators that absorb sound
Data Source
AI summary
Suction muffler (1) for a hermetic refrigeration compressor (2), the suction muffler (1) comprising an inlet (3), so that refrigerant can flow into the suction muffler (1), and an outlet (4), so that refrigerant can flow out from the suction muffler (1), the suction muffler (1) further comprising two damping chambers (5, 6) for sound damping, where the two damping chambers (5, 6) each has a floor (8, 9) and where a wall element (11) is provided, in order to separate the two damping chambers (5, 6) from each other for the refrigerant in the region of their floors (8, 9). In order to guarantee that the damping chambers (5, 6) are overall as gas-tight and sound-tight as possible, it is provided according to the invention that in the region of the wall element (11) at least one siphon segment (16) that connects the two floors is disposed, in order to receive oil (14) in an operating position of the suction muffler (1), where the at least one siphon segment (16) connects the two damping chambers (5, 6) in siphon fashion to each other for the oil (14).