RV Warm Air Duct Partition Layout for Balanced Heating

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Solution Overview

Problem

Existing warm air distribution systems in recreational vehicles, such as mobile homes and caravans, face challenges in achieving an efficient and balanced distribution of warm air, often resulting in uneven heating and increased heat loss.

Innovation Solution

A component for warm air distribution is designed with multiple warm air inlets and outlets, allowing for the separation of warm air ducts by a partition wall, which enables efficient distribution and reduces heat loss by allowing for a compact and insulated design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single warm air duct is used to distribute warm air to multiple outlets, then the device complexity is reduced, but the warm air distribution becomes unbalanced and heat loss increases

Engineering Contradiction:
Improveduct configurationVSAvoidheat loss
Core Design Contradiction:
Device complexityVSLoss of energy

Solution Approach 1:

The patent divides the single warm air duct into multiple separate ducts, each serving specific outlets. This segmentation allows independent optimization of each duct's path and insulation, reducing heat loss while maintaining manageable complexity through modular construction.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different ducts are provided with different levels of insulation and routing based on their specific requirements. Ducts serving outlets farther from the heater or in colder regions receive enhanced insulation, optimizing heat retention locally where needed most.

Inventive Principle:
Principle #3Local quality

2Adaptability or versatility

If warm air outlets are positioned on opposite sides of the vehicle, then the adaptability and heating coverage are improved, but the duct length and heat loss increase

Engineering Contradiction:
Improveheating coverageVSAvoidheat loss
Core Design Contradiction:
Adaptability or versatilityVSLoss of energy

Solution Approach 1:

Instead of one long duct spanning the vehicle, the system uses multiple shorter ducts that branch out to different sides. This segmentation reduces the total surface area requiring insulation and minimizes heat loss while still achieving comprehensive heating coverage.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A partition wall with integrated duct passages acts as an intermediary structure, allowing ducts to pass through the vehicle's center section. This enables efficient routing to opposite sides without requiring excessively long external ducts, reducing heat loss while maintaining adaptability.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Loss of energy

If multiple separate ducts are provided for different outlets, then the warm air distribution balance is improved, but the device complexity and space requirements increase

Engineering Contradiction:
Improvedistribution efficiencyVSAvoidduct system
Core Design Contradiction:
Loss of energyVSDevice complexity

Solution Approach 1:

Multiple ducts are merged into a single integrated base body structure, with each duct having its own insulation layer. This combining approach reduces the number of separate components to install while maintaining the distribution benefits of multiple ducts, balancing complexity with performance.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The base body serves multiple functions: it provides structural support, houses the heater, contains multiple insulated ducts, and acts as a mounting platform for outlets. This multi-functionality reduces overall system complexity by consolidating what would otherwise be separate components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Ease of manufacture

If the ducts are routed externally along the vehicle walls, then the installation ease is improved, but the heat loss and space requirements increase

Engineering Contradiction:
Improveinstallation easeVSAvoidheat loss
Core Design Contradiction:
Ease of manufactureVSLoss of energy

Solution Approach 1:

The ducts are nested within the base body structure, with each duct positioned in its own recess or cavity. This nesting approach allows easy installation of the integrated base body while protecting the ducts from external heat loss, combining installation simplicity with thermal efficiency.

Inventive Principle:
Principle #7Nested doll (Nesting)

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

The solution achieves improved warm air distribution by allowing for separate and balanced flow of warm air to different sides of the vehicle, reducing heat loss and providing a more efficient and compact installation option.

Implementation Method 1

The component is characterized in that at least one partition wall (7) is provided which separates the warm air ducts (11, 21) from one another

Methodology Applied
Scientific EffectThermal Insulation: Thermal Insulation

Implementation Method 2

The component (1) is characterized in that at least one partition wall (7) is provided which separates the warm air ducts (11, 21) from one another, wherein the component (1) comprises a closed underside (5) and an open upper side (6)

Methodology Applied
Scientific EffectPhysical Containment: Physical Containment

Data Source

PatentEP4316879B1Hot air distribution component for a recreational vehicle and recreational vehicle with said component
Publication Date: 2025.06.18 HYMER GMBH & CO KG
  • EP4316879B1 patent drawingFigure 1~2

AI summary

Component (1) for warm air distribution for a recreational vehicle, in particular a motorhome or caravan, with at least one warm air inlet (8), a first warm air outlet (9), and at least one second warm air outlet (10), wherein, in the assembled state, warm air supplied above the warm air inlet (8) can be guided through a warm air duct (11) from the warm air inlet (8) to the first warm air outlet (9) and to the second warm air outlet (10), in the assembled state the first warm air outlet (9) is arranged in the area (15) of a first side of the vehicle (16) and the second warm air outlet (10) is arranged in the assembled state in the area (17) of a side of the vehicle (18) opposite the first side of the vehicle (16).