Heat source unit with corrugated bottom plate
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Solution Overview
Problem
Conventional heat source units with corrugated plate-like bottom frames face a challenge in balancing water drainage performance and structural strength, as excessive openings for drainage can compromise the frame's integrity.
Innovation Solution
The design incorporates water drainage passages in the form of clearances between the ridge and furrow portions of the bottom frame, supported by mounting feet, which enhance drainage while maintaining strength by distributing water effectively and preventing excessive weakening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If numerous openings are formed in the bottom frame to improve water drainage performance, then water drainage performance is improved, but the strength of the bottom frame is reduced
Solution Approach 1:
The invention divides the water drainage function into multiple segments: clearances in ridge portions, clearances in furrow portions, and openings in end portions. This segmentation allows water to drain through multiple pathways without requiring excessive openings in any single location, thereby maintaining bottom frame strength while achieving effective water drainage performance.
Solution Approach 2:
The invention applies different drainage structures to different locations of the bottom frame: clearances (narrow gaps) are used in ridge and furrow portions where strength is critical, while openings are concentrated in end portions where strength requirements are lower. This local differentiation optimizes both drainage performance and structural integrity.
2Strength
If the bottom frame is made with high-strength corrugated plate-like structure, then the strength is maintained, but the number of openings must be limited which reduces water drainage performance
Solution Approach 1:
The invention utilizes the third dimension by creating clearances (gaps) between corrugated structures rather than only forming openings in the plane of the bottom frame. These vertical clearances between ridges and furrows provide additional drainage pathways that do not compromise the planar strength of the bottom frame structure.
3Productivity
If clearances are formed between ridge portions and wall portions for water drainage, then water drainage performance is improved without forming openings in ridge portions, but the clearance size must be precisely controlled
Solution Approach 1:
The clearance dimensions are determined by the standard corrugated plate geometry itself rather than requiring separate precision machining operations. The clearances are inherent gaps between the corrugated ridges and furrows, which are formed by standard rolling or bending processes. This self-forming characteristic reduces manufacturing complexity while providing adequate drainage clearance.
Data Source
AI summary
A heat source unit includes: a corrugated plate-like bottom frame in which ridges and furrows extend across the front and rear direction or across the right and left direction; and mounting feet. The mounting feet include: supports that support, from below, the furrows of supported ends of the bottom frame on sides that the ridges and the furrows can be seen; and walls disposed on outer sides of the supported ends and that extend upward from the supports. Water drainage passages, that drain water sticking to tops of the ridges of the supported ends to the supports, are disposed above the supports.