Scroll Compressor Valve Stop Venting for Lower Compression Loss
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Solution Overview
Problem
Conventional compressors experience increased compression loss due to restricted refrigerant gas flow and excessive force on reed valves, resulting from narrow muffler spaces and valve stops that limit the area of the discharge channel.
Innovation Solution
Incorporating ventilation holes in the valve stop to increase the channel area for smoother refrigerant gas flow and reduce the force on reed valves, thereby enhancing efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If valve stop restricts the lift amount of reed valve to prevent excessive deformation, then reliability of reed valve is improved, but compression loss increases due to restricted refrigerant gas flow
Solution Approach 1:
The valve stop is segmented by providing multiple ventilation holes (first ventilation hole and second ventilation hole) instead of a single solid structure. This segmentation allows refrigerant gas to flow through multiple paths, reducing compression loss while the valve stop still restricts reed valve lift to prevent excessive deformation.
Solution Approach 2:
The ventilation holes in the valve stop act as an intermediary structure that mediates between the need to restrict reed valve lift (for reliability) and the need to allow smooth refrigerant gas flow (to reduce compression loss). The holes provide a controlled passage that balances these two requirements.
2Device complexity
If muffler space is made narrow to reduce device size, then device complexity is reduced, but compression loss increases due to difficulty in refrigerant gas passage
Solution Approach 1:
The valve stop is segmented with multiple ventilation holes that create additional flow paths for refrigerant gas. This segmentation compensates for the narrow muffler space by providing multiple channels for gas passage, reducing compression loss without increasing overall device size.
Solution Approach 2:
Instead of expanding the muffler space in the horizontal direction, the solution adds vertical flow paths through the ventilation holes in the valve stop. This dimensional change allows refrigerant gas to pass through the narrow space more efficiently by utilizing the vertical dimension for flow.
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
The implementation of ventilation holes in the compressor design effectively suppresses compression loss, improving efficiency and reliability by allowing smoother refrigerant gas flow and reducing the force on reed valves.
Implementation Method 1
the flow of the refrigerant gas is smoothed to suppress the compression loss
Implementation Method 2
The reed valve is disposed in the fixed scroll and opening and closing the at least one discharge port
Data Source
AI summary
A compressor includes: a fixed scroll; at least one discharge port; a reed valve; a valve stop; and a ventilation hole. The at least one discharge port is disposed in the fixed scroll. The reed valve is disposed in the fixed scroll so as to block the at least one discharge port. The valve stop is disposed in the fixed scroll, and restricts the lift amount of the reed valve. The ventilation hole is disposed in the valve stop. In the present aspect, the flow of refrigerant gas is smoothed to suppress the compression loss, and the force applied to the reed valve can be suppressed. As a result, the efficiency and reliability can be improved.