Outdoor Unit Drainage Structure for Compressor Dew Control
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Solution Overview
Problem
In outdoor air-conditioning units, condensed dew on refrigerant pipes causes water to drip onto sound insulation elements made of felt, leading to water accumulation and potential refrigerant leaks due to compressor rust, as well as false temperature readings from submerged sensors.
Innovation Solution
A non-water-absorbent draining element is integrated into the sound insulation system, tilting from the top cover to a cutout portion in the side cover, allowing condensed water to flow along its surface and be drained, preventing it from penetrating into the felt insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a sound insulation element made of felt is attached to the compressor, then noise from the compressor is reduced, but condensed water penetrates into the felt and causes false temperature readings and refrigerant leaks
Solution Approach 1:
The sound insulation element is divided into multiple functional regions: a water-repellent region (first region) that prevents water penetration, and a sound insulation region (second region) that reduces noise. This segmentation allows each region to perform its specific function without interfering with the other, solving the contradiction between noise reduction and reliability.
Solution Approach 2:
Different portions of the sound insulation element are assigned different material properties: the first region has water-repellent properties to prevent condensed water penetration, while the second region has sound-absorbing properties for noise reduction. This local differentiation of material quality resolves the contradiction by providing both water protection and noise insulation in the same component.
2Volume of moving object
If the outdoor unit main body is reduced in size to save space, then space efficiency is improved, but refrigerant pipes are densely arranged and more pipes are positioned above the compressor, increasing the risk of water condensation issues
Solution Approach 1:
The water-repellent first region acts as an intermediary barrier between the condensed water on refrigerant pipes and the internal components of the outdoor unit. This intermediary layer prevents water from reaching sensitive components while allowing the unit to maintain a compact design with densely arranged refrigerant pipes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively prevents water from entering the sound insulation element, inhibiting false temperature readings and refrigerant leaks, while maintaining noise suppression functionality.
Implementation Method 1
a non-water-absorbent draining element disposed across from a central portion of the top cover to a bottom portion of the cutout portion, and tilts down from the central portion of the top cover toward a bottom portion of the cutout portion
Data Source
AI summary
An outdoor unit for an air-conditioning apparatus, having a compressor, a top cover configured to cover an upper surface of the compressor, and a side cover configured to cover a side of the compressor and a side of the top cover, the side cover including a rectangular cutout portion formed in a part of an upper end of the side cover. The outdoor unit has a non-water-absorbent draining element disposed across from a central portion of the top cover to a bottom portion of the cutout portion, and tilts down from the central portion of the top cover toward the bottom portion of the cutout portion.