Outdoor unit for air conditioner
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Solution Overview
Problem
The existing outdoor units for air-conditioning apparatuses have an unattractive design due to groove-shaped temporary fixing portions, which affect their appearance and make alignment of screw holes difficult during assembly.
Innovation Solution
The outdoor unit incorporates a curled portion on the top panel and a protruding portion on the machine-chamber front panel, allowing for temporary fixation without visible deformation, ensuring easy alignment and screwing while maintaining a sleek design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a groove-shaped temporary fixing portion is provided on the top panel, then the machine-chamber front panel can be temporarily fixed to align screw holes, but the appearance becomes unattractive due to visible dents
Solution Approach 1:
The temporary fixing function is extracted from the top panel surface by using the side plate's protruding portion and curled portion mechanism. The groove-shaped portion is eliminated from the top panel, and the temporary fixing function is transferred to the side plate structure, which does not affect the top panel's appearance.
Solution Approach 2:
The side plate acts as an intermediary component that provides the temporary fixing function. The protruding portion on the side plate engages with the curled portion, creating a temporary fix that aligns screw holes without requiring any visible modification to the top panel's front surface.
2Ease of repair
If the machine-chamber front panel is made removable for serviceability, then maintenance becomes easier, but alignment of screw holes becomes difficult due to panel displacement by weight
Solution Approach 1:
The side plate's protruding portion and curled portion mechanism performs preliminary alignment action before the actual screwing operation. When the machine-chamber front panel is positioned, the protruding portion automatically engages with the curled portion, pre-aligning the screw holes and compensating for any displacement caused by panel weight.
3Ease of operation
If both top panel and machine-chamber front panel are provided with temporary fixing portions, then alignment workability is improved, but the design complexity and number of components increase
Solution Approach 1:
The temporary fixing function is extracted from the top panel and transferred entirely to the side plate structure. This eliminates the need for groove-shaped portions on both panels, reducing the number of fixing portions while maintaining alignment workability through the side plate's protruding and curled portions.
Data Source
Figure 1
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AI summary
An outdoor unit for an air-conditioning apparatus includes an outer box having a machine chamber formed therein in which a compressor is placed. The outer box includes a machine-chamber front panel placed on a front side of the machine chamber and removable from the outer box, and a top panel to cover a top surface. In a front surface of the top panel, a top-panel screw hole into which a screw is inserted, and a curled portion having a shape curled toward an inner side at a lower end of the top panel are provided. On a front surface of the machine-chamber front panel, at an upper portion thereof, an insertion portion is formed and recessed backward. The insertion portion is provided with a front-panel screw hole into which a screw is inserted, and a protruding portion with a shape projecting toward a front side. When the insertion portion is inserted inside a front surface of the top panel, and a position of the top-panel screw hole is aligned with a position of the front-panel screw hole, the protruding portion is engaged with the curled portion.