Scroll machine with injection and refrigeration system
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Solution Overview
Problem
Existing scroll machines with injection systems for refrigeration systems require complex component geometries to route the injected medium effectively, leading to inefficiencies and increased heat input.
Innovation Solution
A scroll machine design that routes the medium injection line past the high-pressure chamber, using an intermediate base to decouple the second scroll unit from pressure forces and reduce heat input, with a simple and efficient configuration that includes a disc-shaped intermediate base supported on the machine housing and a line system with L-shaped sections and parallel lines for even distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the medium injection line is routed through the high-pressure chamber, then the injection function can be achieved, but the heat input into the medium to be injected increases and the component geometry becomes complex
Solution Approach 1:
The patent introduces an intermediate base as a mediator component that decouples the second scroll unit from the high-pressure chamber. The medium injection line is routed through this intermediate base instead of directly through the high-pressure chamber, thereby reducing heat input while maintaining the injection function. The intermediate base serves as a thermal barrier and structural intermediary that simplifies the overall geometry.
Solution Approach 2:
The patent segments the structural components by introducing an intermediate base that separates the second scroll unit from the high-pressure chamber. This segmentation allows the injection line to be routed independently through the intermediate base, reducing thermal coupling and simplifying the geometric routing of the medium line while maintaining functional integrity.
2Force
If the second scroll unit is directly connected to the high-pressure chamber, then the structure is simpler, but the scroll unit is subjected to significantly higher pressure forces
Solution Approach 1:
The intermediate base acts as a mediator between the high-pressure chamber and the second scroll unit. It absorbs and distributes the pressure forces from the high-pressure chamber, preventing these forces from being directly transmitted to the scroll unit. This reduces the mechanical load on the scroll unit while maintaining structural integrity through the intermediary component.
Solution Approach 2:
The structure is segmented by introducing the intermediate base as a separate component that decouples the load path. This segmentation isolates the second scroll unit from direct exposure to high pressure forces, with the intermediate base bearing and distributing these forces independently, thereby reducing structural complexity at the scroll unit interface.
3Ease of manufacture
If the medium injection line is routed simply, then the design and installation are easier, but the medium distribution may be uneven
Solution Approach 1:
The patent applies local quality by providing multiple injection ports distributed across the second scroll channel rather than a single injection point. The medium injection line is routed to supply multiple locations, ensuring homogeneous distribution of the injected medium throughout the channel. This localized distribution approach maintains simple overall routing while achieving precise uniformity at critical locations.
Data Source
AI summary
A scroll machine with an injection for a medium has a machine housing with a longitudinal axis. A first scroll unit with scroll channel is formed by a scroll rib. A second scroll unit has a first side and a second side opposite the first side. A scroll channel formed by a second scroll rib is provided on the first side, and a high-pressure chamber is arranged on the second side of the second scroll unit and connected with the scroll channel via a passage. These are arranged in the machine housing along the longitudinal axis. The first scroll unit and the second scroll unit engage with each other to form pressure chambers. The first scroll unit can be moved relative to the second scroll unit along an orbital path. An intermediate base is provided along the longitudinal axis between the second scroll unit and the high-pressure chamber.