Scroll Compressor Injection Valve Assembly for Refrigerant Discharge
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Solution Overview
Problem
The existing scroll compressors have limitations in improving performance and efficiency due to a fixed discharge amount of refrigerant from the compression chamber.
Innovation Solution
Incorporating an injection valve assembly with an anti-leakage mechanism between the fixed scroll and the rear housing, which allows for the introduction of middle-pressure refrigerant into the compression chamber, increasing the discharge amount by guiding refrigerant through an injection flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an injection valve assembly is added to increase refrigerant discharge amount, then compressor performance and efficiency are improved, but device complexity increases
Solution Approach 1:
The injection valve assembly is nested within the existing compressor housing structure, specifically positioned between the fixed scroll and the rear housing. The valve assembly integrates with the discharge chamber and compression chamber, allowing the refrigerant injection function to be embedded within the existing mechanical structure rather than adding external components.
Solution Approach 2:
The injection valve assembly serves multiple functions: it controls refrigerant injection timing, regulates refrigerant flow into the compression chamber, and integrates with the discharge chamber to manage high-temperature refrigerant. This multi-functionality increases productivity without proportionally increasing device complexity.
2Productivity
If an injection valve assembly is added to guide refrigerant through an injection flow path, then refrigerant discharge amount increases, but manufacturing complexity increases
Solution Approach 1:
The injection valve assembly merges multiple components into a single integrated unit that includes the valve body, injection flow path, and sealing elements. This consolidation combines the functions of refrigerant guidance, flow control, and sealing into one manufacturable component, reducing the number of separate parts that need to be produced and assembled.
Solution Approach 2:
The injection valve assembly is positioned at a specific location between the fixed scroll and rear housing where high-temperature refrigerant is naturally present. This localized placement allows the injection flow path to utilize the existing thermal environment, eliminating the need for separate heating or cooling systems and simplifying manufacturing.
3Reliability
If anti-leakage means is added to prevent refrigerant leakage, then reliability is improved, but device complexity increases
Solution Approach 1:
The anti-leakage means, including sealing rings and gaskets, are pre-installed on the injection valve assembly and housing surfaces before final assembly. This preliminary placement ensures proper sealing positions are established in advance, preventing refrigerant leakage at the injection valve and discharge chamber interfaces without requiring complex sealing mechanisms during operation.
Solution Approach 2:
The sealing elements in the anti-leakage means are designed to automatically conform to the mating surfaces through elastic deformation or self-adjusting mechanisms. This self-adjusting capability ensures reliable sealing without requiring precision machining or complex adjustment mechanisms, maintaining simplicity while improving reliability.
Data Source
AI summary
A scroll compressor including a housing, a motor provided in the housing, a rotary shaft rotated by the motor, an orbiting scroll configured to orbit in conjunction with the rotary shaft, and a fixed scroll configured to define compression chambers together with the orbiting scroll, in which the housing includes a center housing penetrated by the rotary shaft, a front housing configured to define, together with the center housing, a motor accommodation space that accommodates the motor, and a rear housing configured to define a discharge chamber that accommodates a refrigerant discharged from the compression chamber, and an injection valve assembly provided between the fixed scroll and the rear housing, and the injection valve assembly includes an anti-leakage means and an injection valve configured to open or close an injection flow path that guides the refrigerant, which is introduced from outside of the housing, to the compression chamber.