Vertical-Mount RV Air Conditioner to Prevent Roof Leaks

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Solution Overview

Problem

HVAC systems mounted on the roof of recreational vehicles and trucks are prone to leakage due to water stagnation on upper surfaces, leading to potential water entry into the vehicle's interior through degraded seals.

Innovation Solution

The HVAC system is externally mounted on a vertical surface, utilizing a frame mount with pivoting brackets and a base pan configuration to direct water downward and away from the mounting area, while maintaining air flow control and reducing noise and size, with features like a foam air box and strap for securement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the HVAC system is mounted on the roof of the vehicle, then the air conditioning performance is maintained, but water leakage risk increases due to water stagnation on the upper surface

Engineering Contradiction:
Improveair conditioning performanceVSAvoidwater leakage risk
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The HVAC system is relocated from a two-dimensional roof surface to a three-dimensional vertical wall surface. This dimensional change allows gravity to act on water differently, causing it to flow downward away from the HVAC mounting area rather than pooling around the HVAC unit, thereby reducing water leakage risk while maintaining air conditioning functionality

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If the HVAC system is mounted on a vertical surface, then water leakage risk is reduced, but installation complexity increases due to the need for specialized mounting structures

Engineering Contradiction:
Improvewater leakage riskVSAvoidmounting structure complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The mounting structure is divided into separate functional components: wall mounting brackets that attach to the vertical surface, support arms that position the HVAC unit, and adjustable fastening mechanisms. This segmentation allows each component to be optimized for its specific function and simplifies installation by enabling modular assembly

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mounting structure incorporates adjustable and movable elements that allow the HVAC unit to be positioned at different angles and heights on the vertical wall surface. This dynamic capability enables flexible installation while maintaining secure attachment, reducing the need for complex custom-fitted mounting solutions

Inventive Principle:
Principle #15Dynamics

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 configuration effectively reduces the risk of water leakage, improves noise reduction, and maintains serviceability while controlling condensation and air flow, ensuring efficient operation and durability.

Implementation Method 1

the frame having at least one curved edge, the at least one curved edge engaging a corresponding edge of a frame mount and allowing pivoting motion of the frame relative to the frame mount

Methodology Applied
Scientific EffectPivoting motion: Hinge

Implementation Method 2

By positioning the HVAC on a vertical surface, gravity works to move water downward and away from the HVAC system rather than allowing it to stagnate

Methodology Applied
Scientific EffectGravity: Gravitation

Data Source

PatentUS11951798B2Mobile air conditioner
Publication Date: 2024.04.09 DOMETIC APPLIANCES
  • US11951798B2 patent drawing
  • US11951798B2 patent drawing
  • US11951798B2 patent drawing

AI summary

The present embodiments relate to an HVAC system which is externally mounted on a vertical surface of an RV, truck or bus. The desire is to eliminate, or at least substantially reduce, a potential leakage path wherein water may sit on an upper surface of a vehicle and due to seal degradation over long periods of time, may find a pathway in through the roof of the vehicle and to an interior thereof. By positioning the HVAC on a vertical surface, gravity works to move water downward and away from the HVAC system rather than allowing it to stagnate in an area around potential apertures through the outer skin or outer surface of the vehicle.