Scroll Compressor with Band-Defined Intermediate Injection Chambers
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Solution Overview
Problem
Existing scroll compressors in HVACR systems lack efficient mechanisms for intermediate pressure injection, leading to suboptimal performance and energy efficiency.
Innovation Solution
The integration of intermediate injection chambers and bands within the scroll compressor housing, forming compression pockets and connecting to intermediate injection ports, enhances the injection of intermediate pressure working fluid, improving compression efficiency and energy utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional scroll compressor design is used, then结构简单 (structure is simple), but 压缩效率 (compression efficiency) is low
Solution Approach 1:
The compressor is divided into multiple chambers including suction chamber, discharge chamber, and intermediate injection chamber. The scroll members are segmented with multiple spiral wraps creating discrete compression pockets, allowing intermediate injection at specific stages of compression to improve efficiency without overwhelming structural complexity
Solution Approach 2:
An intermediate injection chamber and intermediate injection port are introduced as intermediary components between the suction and discharge chambers. This allows intermediate pressure working fluid to be injected into the compression pockets at an intermediate stage, improving compression efficiency through staged compression while maintaining manageable structural complexity
2Loss of energy
If intermediate injection is added, then 能量效率 (energy efficiency) is improved, but 制造复杂度 (manufacturing complexity) increases
Solution Approach 1:
The intermediate injection chamber is merged with the existing compressor housing structure, and the intermediate injection port is integrated into the non-orbiting scroll member. This combining of functions into existing structural elements improves energy efficiency through intermediate injection while avoiding the need for entirely separate manufacturing processes
Solution Approach 2:
The non-orbiting scroll member serves multiple functions: it forms compression pockets with the orbiting scroll member, provides the intermediate injection port, and structurally supports the bands. This multi-functionality improves energy efficiency through intermediate injection while reducing the number of separate manufactured components
3Reliability
If bands are used to define intermediate injection chamber, then 密封性 (sealing performance) is improved, but装配复杂度 (assembly complexity) increases
Solution Approach 1:
Bands are used to define the intermediate injection chamber and form seals between chambers. These flexible or elastic bands can accommodate manufacturing tolerances and thermal expansion, providing reliable sealing performance while allowing for simpler assembly compared to rigid sealed structures
Solution Approach 2:
The bands are positioned within the compressor housing, nesting the intermediate injection chamber definition within the existing housing structure. This nested arrangement improves sealing performance by ensuring proper chamber definition while minimizing additional assembly steps beyond placing the bands in their designated positions
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
Enhances compression efficiency and energy efficiency by allowing for the integration of intermediate pressure working fluid, resulting in improved performance and reduced energy consumption.
Implementation Method 1
One type of compressor is a scroll compressor which generally includes a pair of scroll members which orbit relative to each other to compress gas
Implementation Method 2
the first band forms a seal between the intermediate injection chamber and the discharge chamber, and the second band forms a seal between the intermediate injection chamber and the suction chamber
Implementation Method 3
The intermediate injection chamber fluidly connects the intermediate injection inlet to an intermediate injection port in the non-orbiting scroll member
Data Source
AI summary
A scroll compressor includes a compressor housing containing an orbiting scroll member, a non-orbiting scroll member, bands disposed between the non-orbiting scroll member and the compressor housing, a suction chamber, a discharge chamber, and one or more intermediate injection chamber defined by the bands. The non-orbiting scroll member includes one or more intermediate injection ports fluidly connecting the one or more intermediate injection chambers to at least one compression pocket formed by the intermeshed scroll members. A heating, ventilation, air conditioning, and refrigeration system includes a refrigerant circuit with a condenser, an expander, an evaporator, and the scroll compressor fluidly connected. A method of making a scroll compressor includes placing an upper portion of a compressor housing over a non-orbiting scroll member with bands disposed therebetween, and interference fitting the upper portion onto the non-orbiting scroll member via the bands.