Air Handler Enclosure Design for Non-Invasive Control Access

Solution Overview

Problem

In typical residential HVAC systems, servicing or diagnosing issues with the air handler requires removing casing panels, which renders the system inoperable and exposes electrical components to airflow, altering operational characteristics and potentially damaging controls.

Innovation Solution

The air handler design includes an axial fan housing with isolated enclosures for electronic controls and a heating coil, allowing access to components without disrupting airflow, using doors or panels with latches and fasteners for secure access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If casing panels are removed for servicing or diagnosis, then access to fan and electrical components is improved, but the air handler becomes inoperable and ambient air enters the airflow passageway

Engineering Contradiction:

Improveaccess to componentsVSAvoidsystem operability

Core Design Contradiction:

Ease of repairVSReliability

Solution Approach 1:

The air handler is divided into multiple access points: a first access point for the airflow passageway and a second access point for the electrical components. This segmentation allows servicing of electrical components without removing the main casing panel, thereby maintaining system operability while providing access to controls and fan.

Inventive Principle:

Principle #1Segmentation

2Ease of repair

If casing panels are removed for servicing, then access to electrical components is improved, but controls are exposed to airflow passageway altering operational characteristics

Engineering Contradiction:

Improveaccess to controlsVSAvoidairflow exposure to controls

Core Design Contradiction:

Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The air handler is divided into multiple access points: a first access point for the airflow passageway and a second access point for the electrical components. This segmentation allows servicing of electrical components without removing the main casing panel, thereby maintaining system operability while providing access to controls and fan.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The electrical components and controls are extracted into a separate enclosed space with its own access point. This isolation allows the controls to be serviced through the second access point without exposing them to the airflow passageway, preventing operational characteristic alterations.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If a single access point is used for all components, then device complexity is reduced, but access to electrical components requires disrupting airflow

Engineering Contradiction:

Improvenumber of access pointsVSAvoidcomponent access without airflow disruption

Core Design Contradiction:

Device complexityVSEase of repair

Solution Approach 1:

The air handler is divided into multiple access points: a first access point for the airflow passageway and a second access point for the electrical components. This segmentation allows servicing of electrical components without removing the main casing panel, thereby maintaining system operability while providing access to controls and fan.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250290645A1Air handler

Publication Date: 2025.09.18 RHEEM MFG CO

AI summary

The present disclosure provides an air handler including a body and an axial fan housing disposed within the body. The axial fan housing defines an aperture in fluid communication with an axial fan disposed therein and at least one enclosure located at a corner thereof, such that the at least one enclosure is isolated from a continuous airflow passageway through the aperture of the axial fan housing. The enclosure is configured to house electronic controls therein.