Distributed HVAC Alarm Network via Data Bus

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Solution Overview

Problem

Conventional HVAC systems lack advanced control and data acquisition techniques, making them less flexible, more difficult to install and maintain, and less efficient in temperature and humidity control, with limited diagnostic capabilities and longer service life.

Innovation Solution

A distributed-architecture HVAC system with a data processing and communication network that allows components to share identity, capability, status, and operational data via a data bus, enabling flexible installation, improved control, and enhanced diagnostic capabilities through a user interface and alarm management system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional HVAC systems are used, then the system structure is simple, but the flexibility of installation and maintenance is poor

Engineering Contradiction:
Improveflexibility of installation and maintenanceVSAvoidsystem structure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The HVAC system is divided into multiple independent control units, each capable of autonomous operation and communication. Each unit has its own processor and memory, allowing modular installation and maintenance without affecting the entire system.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The control units are designed with universal communication protocols and standardized interfaces that enable them to perform multiple functions including temperature control, humidity control, and diagnostic operations across different system configurations.

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

2Ease of repair

If conventional HVAC systems are used, then the system is easier to manufacture, but the diagnostic capabilities are limited

Engineering Contradiction:
Improvediagnostic capabilitiesVSAvoidsystem complexity
Core Design Contradiction:
Ease of repairVSDevice complexity

Solution Approach 1:

The system continuously monitors operational parameters and provides real-time feedback through the communication network. Each control unit reports status information, enabling proactive diagnostics and faster identification of issues before they become critical failures.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

A centralized communication network acts as an intermediary between all system components, facilitating coordinated diagnostics and maintenance operations. The network enables remote access and centralized monitoring without requiring physical access to each component.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If conventional HVAC systems are used, then the control system is simpler, but the temperature and humidity control efficiency is lower

Engineering Contradiction:
Improvetemperature and humidity control efficiencyVSAvoidcontrol system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The control system dynamically adjusts operational parameters based on real-time environmental conditions and system status. Control units can modify setpoints, airflow rates, and energy consumption levels adaptively to optimize temperature and humidity control efficiency.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent replaces traditional mechanical control mechanisms with electronic communication and digital processing. Data buses and digital protocols enable precise control of HVAC parameters without complex mechanical linkages or analog control systems.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Use of energy by moving object

If conventional HVAC systems are used, then the energy consumption is higher, but the system has fewer communication features

Engineering Contradiction:
Improveenergy efficiencyVSAvoidcommunication features
Core Design Contradiction:
Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The communication network operates continuously to optimize system performance and energy consumption. Real-time data exchange between control units enables continuous adjustment of operational parameters to maintain energy efficiency without interrupting HVAC services.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The system changes operational parameters such as fan speeds, compressor cycles, and valve positions based on communication-driven insights. These dynamic parameter adjustments optimize energy consumption while maintaining comfortable environmental conditions.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS8437878B2Alarm and diagnostics system and method for a distributed architecture heating, ventilation and air conditioning network
Publication Date: 2013.05.07 LENNOX IND INC
  • US8437878B2 patent drawing
  • US8437878B2 patent drawing
  • US8437878B2 patent drawing

AI summary

The disclosure provides an HVAC data processing and communication network and a method of manufacturing the same. In one embodiment the network includes a system device and a user interface. The system device is configured to generate and locally store an alarm record in response to an alarm event. The system device is further configured to receive an alarm request message via a data bus. In response to receiving the alarm request message, the system device is configured to publish an alarm reporting message over the data bus. The user interface is configured to receive the alarm message and display an alert depending on a state of the flag.