Variable-Capacity Compressor Valve Segmentation
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Solution Overview
Problem
Conventional variable-capacity compressor control valves face challenges in regulating the opening degree of the in-valve release passage, leading to increased internal refrigerant circulation and reduced operation efficiency, particularly due to the lack of design flexibility in the passage area and the fixed orifice configuration.
Innovation Solution
A variable-capacity compressor control valve design featuring separate in-valve large-opening and small-opening release passages, where the opening degree of the small-opening passage is adjustable with the main valve element's movement, allowing for independent regulation of the passage areas during different operational times, reducing internal refrigerant circulation and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single in-valve release passage is used, then the structure is simple, but the passage area cannot be independently regulated during different operational times, leading to increased internal refrigerant circulation
Solution Approach 1:
The single in-valve release passage is divided into two separate passages: a large-opening release passage and a small-opening release passage. This segmentation allows independent regulation of passage areas during different operational times, reducing internal refrigerant circulation while maintaining structural manageability through clear functional separation.
Solution Approach 2:
The control valve employs dynamic switching between the large-opening and small-opening release passages based on operational conditions. The main valve element's position dynamically determines which passage is active, enabling adaptability in passage area regulation without requiring a completely complex reconfigurable structure.
2Productivity
If the in-valve release passage area is large, then refrigerant release is efficient during compressor actuation, but internal circulation increases during normal control time
Solution Approach 1:
The release passage system is segmented into large-opening and small-opening passages, each optimized for specific operational phases. The large-opening passage handles high-volume refrigerant release during compressor actuation, while the small-opening passage provides controlled release during normal control time, preventing excessive internal circulation and energy loss.
Solution Approach 2:
The system changes the effective passage area parameter based on operational conditions. During compressor actuation, the large-opening passage is activated for high productivity; during normal control time, the small-opening passage is used to minimize internal circulation and energy loss, achieving parameter adaptation without structural complexity.
3Speed
If the valve orifice is closed quickly, then compressor response is fast, but internal circulation of refrigerant increases
Solution Approach 1:
The small-opening release passage is activated in advance during the valve closing process. As the main valve element moves to close the valve orifice, the small-opening passage begins releasing refrigerant from the crank chamber, creating a preliminary action that prevents pressure buildup and reduces internal circulation before the valve fully closes, maintaining fast response while controlling refrigerant quantity.
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 design effectively reduces internal refrigerant circulation and improves compressor operation efficiency by allowing precise regulation of the release passage areas, optimizing performance during both normal control and compressor actuation times.
Implementation Method 1
an electromagnetic actuator with a plunger for moving the main valve element in the direction to open or close the valve orifice
Implementation Method 2
a pressure-sensitive chamber that receives the suction pressure Ps from the compressor 100 via the Ps inlet/outlet port; and a pressure-sensitive reaction member that urges the main valve element in the direction to open or close the valve orifice in accordance with the pressure in the pressure-sensitive chamber
Data Source
AI summary
A variable-capacity compressor control valve is configured for easily regulating the opening degree of an in-valve release passage, and thus can effectively reduce internal circulation of refrigerant within the compressor and effectively improve the operation efficiency of the compressor. An in-valve large-opening release passage with a relatively large opening degree, which is used during the compressor actuation time, and an in-valve small-opening release passage with a relatively small opening degree, which is used during both the compressor actuation time and the normal control time (i.e., Pd→Pc control time), are formed using different passages.