Modular Duct HVAC Unit for Room Temperature and Humidity Control

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Solution Overview

Problem

Centralized HVAC systems in large commercial buildings struggle to maintain precise temperature and humidity control in individual rooms, especially in environments like hospital operating rooms, due to inefficiencies and space constraints of standalone modular units, which often conflict with central systems and result in energy inefficiencies.

Innovation Solution

A modular heating, cooling, and humidifying unit designed to fit within existing air ducting systems, equipped with a plenum, heating and cooling coils, a humidifier, dampers, and air filters, allowing for manual and automatic control of temperature and humidity, operating in concert with central HVAC systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If standalone modular HVAC units are installed in individual rooms, then individual temperature and humidity control is achieved, but the units occupy substantial space in the room and conflict with central HVAC systems

Engineering Contradiction:
Improvetemperature and humidity control precisionVSAvoidspace occupied in room
Core Design Contradiction:
Measurement precisionVSArea of stationary object

Solution Approach 1:

The modular HVAC unit is nested within the existing air ducting system of the building. The unit fits inside the ductwork structure, utilizing the existing spatial infrastructure rather than occupying additional room space. This allows individual room control while maintaining the aesthetic and spatial integrity of the room environment.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The modular unit acts as an intermediary between the central HVAC system and the individual room environment. It receives conditioned air from the central system through the ductwork, then independently adjusts temperature and humidity before delivering it to the specific room, resolving the conflict between centralized and localized control.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If standalone modular HVAC units are installed in individual rooms, then individual temperature and humidity control is achieved, but energy inefficiencies occur due to conflict with central HVAC systems

Engineering Contradiction:
Improvetemperature and humidity control precisionVSAvoidenergy efficiency
Core Design Contradiction:
Measurement precisionVSLoss of energy

Solution Approach 1:

The modular unit incorporates feedback controls that monitor room conditions and communicate with both the local environment sensors and the central HVAC system. This feedback mechanism allows the unit to coordinate its operation with the central system, adjusting its heating and cooling cycles to complement rather than conflict with centralized operations, thereby reducing energy waste.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system dynamically adjusts its operation based on real-time conditions. The modular unit can switch between different operational modes (heating, cooling, humidifying, dehumidifying) and adjust its intensity based on the central HVAC system's current state and the specific room's requirements, optimizing energy efficiency through adaptive control.

Inventive Principle:
Principle #15Dynamics

3Productivity

If centralized HVAC systems are used in large commercial buildings, then entire building cooling and heating requirements are met, but precise control of temperature and humidity in individual rooms is difficult

Engineering Contradiction:
Improvebuilding-wide HVAC coverageVSAvoidindividual room temperature and humidity control
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

The system segments the building's HVAC control into two levels: the central HVAC system handles overall building-wide temperature and humidity management, while the modular units in each room provide localized precision control. This segmentation allows both centralized efficiency and individualized precision to coexist, with each level operating independently but cooperatively.

Inventive Principle:
Principle #1Segmentation

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

Enables precise and consistent temperature and humidity control within individual rooms without occupying physical space, while synchronizing with central HVAC systems, reducing energy inefficiencies and maintaining balance across areas.

Implementation Method 1

The cooling coil is provided with a liquid refrigerant

Methodology Applied
Scientific EffectHeat transfer: Heat Exchanger

Implementation Method 2

the heating coil is provided with a supply of hot water or steam

Methodology Applied
Scientific EffectHeat transfer: Heat Exchanger

Implementation Method 3

the humidifier is supplied with water

Methodology Applied
Scientific EffectEvaporation: Evaporation

Data Source

PatentUS8047448B1Modular air conditioning system
Publication Date: 2011.11.01 COIL MASTER CORP
  • US8047448B1 patent drawing
  • US8047448B1 patent drawing
  • US8047448B1 patent drawing

AI summary

The invention is a modular heating, cooling and humidifying unit designed to fit within, or be interposed between segments of existing air ducting systems. The invention includes a plenum through which air is received from a central system within a structure, and which discharges heated, cooled and/or humidified air to a particular compartment within the structure, such as a room. The invention includes within the plenum a heating coil, a cooling coil and a humidifier, one or more dampeners and one or more air filters. Each of these elements is provided with controls which may be both manually and automatically operated to regulate the temperature and humidity of air being discharged into the desired room or compartment.