Modular Vehicular Air-Conditioner Assembly for Brazing Quality
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Solution Overview
Problem
Conventional vehicular air-conditioning apparatus assembly methods on production lines face quality issues due to unnatural brazing positions and low productivity, requiring improvements in brazing work efficiency and quality.
Innovation Solution
The assembly method modularizes the refrigeration cycle, including a compressor, indoor, and outdoor heat exchangers, off the production line, forming a refrigeration cycle module that reduces the need for brazing on the line, facilitating assembly, improving quality, and increasing productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brazing work is performed on the production line for all refrigeration cycle components, then assembly completeness is ensured, but productivity decreases and quality suffers due to unnatural brazing positions
Solution Approach 1:
The refrigeration cycle is divided into separate modules (compressor module, indoor heat exchanger module, outdoor heat exchanger module) that are assembled and brazed independently off the production line, then integrated as complete modules on the production line. This segmentation allows brazing to be performed in optimal positions rather than constrained by production line limitations.
Solution Approach 2:
The modules are pre-assembled and pre-brazed before being brought to the production line. This preliminary action allows brazing work to be completed in advance under controlled conditions with proper positioning, eliminating the need to perform brazing in unnatural positions on the production line.
2Manufacturing precision
If all assembly work is performed on the production line, then process control is maintained, but productivity is limited by sequential operation requirements
Solution Approach 1:
The assembly process is segmented into module fabrication (off-line) and module integration (on-line). This allows different teams to work on different modules simultaneously in parallel, dramatically increasing overall productivity while maintaining quality control through standardized module interfaces.
Solution Approach 2:
The modular refrigeration cycle modules serve as intermediaries between component manufacturing and final system assembly. These standardized modules can be manufactured independently and then easily integrated on the production line, facilitating parallel processing and improving overall throughput.
3Productivity
If brazing is performed in unnatural body positions on the production line, then assembly continuity is maintained, but quality deteriorates due to adverse effects on brazing quality
Solution Approach 1:
Brazing is performed as a preliminary action during module fabrication before modules are transported to the production line. This allows brazing to be completed in optimal positions with proper fixtures and positioning equipment, ensuring high quality without compromising assembly continuity on the production line.
Solution Approach 2:
The brazing operation is extracted from the production line process and performed separately during module fabrication. This extraction eliminates the constraint of performing brazing in unnatural positions on the production line while maintaining continuous flow on the assembly line.
Data Source
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AI summary
An assembling method of a vehicular air-conditioning apparatus including various equipment, which is required for air-conditioning a vehicle, mounted in a vehicular-air-conditioner frame (1) on a production line includes modularization of, among the various equipment, at least a compressor (2), an indoor heat exchanger (4), and an outdoor heat exchanger (5) off the production line, and, further, modularization of a refrigeration cycle by connecting the above modules with refrigerant pipes (11) off the production line, as well as incorporating the modularized refrigerant cycle into assembly work on the production line as a refrigerant cycle module (24).