HVAC Exterior Cleaning Pipework with Extendable Spray System

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Solution Overview

Problem

Existing HVAC systems lack an effective solution for exterior cleaning, leading to reduced heat exchange rates, energy inefficiency, and potential system damage due to dirty or clogged filters and exterior grime.

Innovation Solution

An extendable PVC pipework system with strategically placed sprayer valves, connected to a hose or integrated pump, designed to clean the exterior of HVAC units, featuring removable components for easy maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If no exterior cleaning system is installed on HVAC units, then the system structure remains simple, but heat exchange rate decreases and energy efficiency deteriorates due to exterior grime accumulation

Engineering Contradiction:
Improveheat exchange rateVSAvoidsystem structure
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The cleaning system is nested within the HVAC unit structure itself. The pipework is integrated into the existing unit framework, with sprayer valves positioned along the interior surfaces. This allows the cleaning function to be embedded within the original equipment without adding external complexity, resolving the contradiction between maintaining simple structure and improving heat exchange rate through regular cleaning capability

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The system enables the HVAC unit to clean its own exterior surfaces through an integrated water delivery system. The sprayer valves are positioned to spray cleaning solution directly onto the exterior grime accumulation areas, and the unit can be serviced by simply connecting a water source, allowing the equipment to maintain itself without requiring disassembly or complex external cleaning apparatus

Inventive Principle:
Principle #25Self-service

2Reliability

If filters are not replaced or cleaned regularly, then maintenance cost and time are reduced, but system reliability deteriorates due to clogged filters causing overheating and potential fire

Engineering Contradiction:
Improvesystem safetyVSAvoidmaintenance frequency
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary cleaning action by maintaining sprayer valves that can be activated to clean exterior surfaces before grime accumulation becomes severe enough to cause overheating or fire hazards. The integrated pipework system allows for periodic preventive cleaning that addresses contamination before it reaches critical levels, thereby maintaining reliability without requiring frequent intensive maintenance interventions

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If a fixed-size cleaning system is installed, then installation is simple, but adaptability deteriorates when dealing with HVAC units of various dimensions

Engineering Contradiction:
Improveunit size compatibilityVSAvoidpipework configuration
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The pipework system incorporates adjustable and flexible components that allow the configuration to be dynamically adapted to different HVAC unit sizes. The sprayer valves can be repositioned along the pipework, and the pipe lengths can be adjusted to match the specific dimensions of various unit models. This dynamic adaptability enables a single system design to serve multiple unit sizes without requiring completely different installations, resolving the contradiction between versatility and complexity

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

The system effectively cleans the exterior of HVAC units, improving heat exchange rates, reducing energy consumption, and preventing system damage, while being adaptable to various unit sizes and easy to maintain.

Implementation Method 1

a plurality of sprayer valves in a communication with the washing fluid configured to cover an outside of the hvac unit in a top-down distribution thereon

Methodology Applied
Scientific EffectFluid spray: Fluid Spray

Data Source

PatentUS12298092B2HVAC exterior cleaning pipework
Publication Date: 2025.05.13 STEWART CARROLL
  • US12298092B2 patent drawing
  • US12298092B2 patent drawing

AI summary

The HVAC exterior cleaning pipework is a system attachable to a HVAC unit, such that the PVC pipework can clean the exterior of the unit by means of strategically placed sprayer valves. The pipework is extendable, such that it can expand or retract to meet the exact dimensions of the specific HVAC unit whereon it should be attached. The pipework may be connected directly to a hose with sufficiently pressurized water, or the integrated pump may assist in the flow of water. The spray heads and the pump have removable components whereby they can be cleaned separately when needed.