Ejector for a refrigerating machine
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Solution Overview
Problem
Traditional ejectors for refrigerating machines face difficulties in easy maintenance and precise alignment due to tight tolerances and complex assembly, making them challenging to assemble, disassemble, and maintain effectively.
Innovation Solution
The ejector is designed with a modular structure comprising a main body and a cartridge organ that includes the nozzle, shutter, and activating group, allowing for easier assembly and disassembly, with a connector element ensuring precise alignment and a screw-nut mechanism for adjustable shutter movement, facilitating simpler and more economical maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the nozzle and shutter are fixed together to form a single body, then the alignment between shutter and nozzle is precise, but the maintenance and extraction of the nozzle become awkward and difficult
Solution Approach 1:
The ejector is divided into separate components: the nozzle (15) is detachably mounted in the main body (11) rather than being permanently fixed, and the shutter (16) is separated from the nozzle support (18). This segmentation allows the nozzle to be easily extracted for maintenance while the shutter can be independently adjusted, resolving the contradiction between alignment precision and maintenance ease.
2Reliability
If tight tolerances are used in shape and dimensions, then the position and movement reliability of the shutter is guaranteed, but the construction becomes more complex and requires more precise manufacturing
Solution Approach 1:
The connector element (19) acts as an intermediary component that couples the shutter (16) to the nozzle (15). This mediator provides a standardized interface with defined tolerance zones, allowing reliable shutter movement without requiring tight tolerances across the entire assembly. The connector element absorbs the complexity of precision requirements, simplifying the overall construction.
3Adaptability or versatility
If the shutter is connected to an activating group that can be fixed and removed, then the ejector becomes more adaptable for maintenance, but the correct insertion of the shutter in its support becomes difficult to perform
Solution Approach 1:
The connector element (19) and its coupling with the nozzle (15) employ asymmetric design features that provide self-alignment and guide the shutter (16) into the correct position during insertion. This asymmetric configuration ensures proper orientation and reduces insertion difficulty while maintaining the adaptability needed for maintenance operations.
Data Source
AI summary
An ejector for a refrigerating machine having a main body crossed by a conduit for passage of refrigerant fluid and having a compartment which includes a seating, which is in communication with the conduit, and a mouth for inlet of refrigerant fluid; a nozzle which can be coupled with the seating and has an internal hole for passage of the refrigerant fluid, and a shutter having an end which can be coupled with the hole to close the hole.