Evaporator rough-in box
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Solution Overview
Problem
Existing rough-in boxes for air conditioner systems face challenges such as difficult installation due to lack of visibility during pipe and cable insertion, damage from subsequent construction activities, and inadequate mounting options for metal studs, as well as issues with condensate drainage and rear access for maintenance.
Innovation Solution
A rough-in box with a hinged faceplate for full visibility during installation, rounded inlet ports to prevent insulation damage, adjustable mounting brackets for versatile stud alignment, a built-in condensate pump mounting option, asymmetrical drain outlets to prevent water collection, and a removable rear faceplate for access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional closed rough-in box is used, then the box protects contents during construction, but the installer cannot see inside to easily insert lineset and cable
Solution Approach 1:
The faceplate is separated from the main box body and made hinged, allowing it to be opened for visibility during installation and then closed for protection. This segmentation enables the box to provide both visibility and protection functions through a single integrated component.
Solution Approach 2:
The faceplate is made dynamic through a hinge mechanism, transitioning from a static closed state to an open state during installation, and back to closed state for protection. This dynamic capability allows the same structure to serve multiple purposes at different installation stages.
2Object-affected harmful factors
If sharp edges are used at inlet ports, then the box structure is simple, but the insulation on copper tubing gets caught and damaged
Solution Approach 1:
The inlet ports are designed with rounded edges instead of sharp corners, creating a smooth curved surface that prevents the insulation on copper tubing from catching or damaging during insertion. This curvature modification eliminates the harmful effect while adding minimal manufacturing complexity.
3Adaptability or versatility
If a fixed mounting bracket is used, then the box structure is simple, but the box cannot accommodate variations in metal stud positioning
Solution Approach 1:
The mounting bracket incorporates an adjustable arm that can be positioned at different locations along the box body, allowing adaptation to varying metal stud positions. This dynamic adjustability provides mounting flexibility while maintaining a relatively simple overall bracket structure.
Solution Approach 2:
The adjustable mounting bracket serves multiple functions: it provides secure attachment to metal studs, accommodates position variations, and maintains structural support. This multi-functionality achieves adaptability without proportionally increasing device complexity.
4Ease of operation
If the faceplate remains closed during installation, then the contents are protected, but the installer must work blind and insertion becomes difficult
Solution Approach 1:
The faceplate is segmented from the box body and equipped with a hinge, enabling it to be opened during installation for visibility and then closed for protection. This segmentation allows the installer to have visual access during insertion while ensuring contents remain protected when the faceplate is closed.
Solution Approach 2:
The faceplate is opened preliminarily during the insertion phase to allow visual guidance, then closed preliminarily before subsequent construction activities to protect the newly installed lineset and cable. This timing of opening and closing resolves the contradiction between visibility and protection.
5Object-affected harmful factors
If symmetrical drain outlets are used, then the box structure is simple, but water collects in low areas creating dead spaces
Solution Approach 1:
The drain outlets are designed with asymmetrical positioning and orientation, strategically placed to eliminate low areas where water could collect. This asymmetrical configuration prevents water accumulation and dead space formation, addressing the harmful effect while adding minimal structural complexity.
Data Source
AI summary
An evaporator rough-in box includes a plurality of walls that define and enclose a chamber, a first one of the walls having cutting lines that encircle a faceplate, one of the cutting lines defining an integral hinge that maintains the faceplate attached to the first one of the walls when a remainder of the cutting lines are cut so that the faceplate can move between an open position and a closed position. A closure maintains the faceplate in the closed position by attaching an edge of the faceplate to the first one of the walls. In addition, ports are provided in at least one of the walls, and a drainage sump is provided at a vertically lower end of the rough-in box, the drainage sump having a drain outlet.