HVAC Network Memory Recovery for Non-Communicating Device Setup

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Solution Overview

Problem

Conventional HVAC systems lack advanced control and data acquisition techniques, making installation, operation, and maintenance inefficient, and they often require complex repairs and have limited flexibility and energy efficiency.

Innovation Solution

A distributed-architecture HVAC system with a data bus for communication among components, allowing for identity, capability, status, and operational data sharing, enabling advanced control and configuration methods, including parameter setting for non-communicating devices through a subnet controller and user interface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a distributed-architecture HVAC network is implemented with data bus communication, then system flexibility and energy efficiency are improved, but device complexity increases

Engineering Contradiction:
Improvesystem flexibilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The HVAC system is divided into multiple independent addressable units (thermostats, controllers, sensors) that communicate over a common data bus. Each unit operates autonomously but can be individually configured and controlled, allowing the system to be segmented into functional modules that can be added, removed, or modified without affecting the entire system.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The data bus infrastructure serves multiple functions simultaneously: it provides communication between all addressable units, enables centralized and distributed control, supports data acquisition and monitoring, and allows for system configuration and diagnostics. This multi-functional approach eliminates the need for separate communication and control systems.

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

2Ease of operation

If parameter setting for non-communicating devices is enabled through a communicating device, then ease of installation and operation is improved, but loss of information increases

Engineering Contradiction:
Improveease of installationVSAvoidparameter information loss
Core Design Contradiction:
Ease of operationVSLoss of information

Solution Approach 1:

When a non-communicating device is encountered, the system creates a virtual representation or copy of the device within the communicating device's memory. The parameters, configuration data, and operational settings for the non-communicating device are stored in the communicating device, allowing the system to track and control these devices without direct communication capability from the devices themselves.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The communicating device acts as an intermediary between the system controller and non-communicating devices. It receives configuration commands, stores parameter information, and translates control signals into actions that affect the non-communicating devices, thereby bridging the communication gap.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Measurement precision

If advanced control and data acquisition techniques are implemented, then temperature and humidity control precision is improved, but device complexity increases

Engineering Contradiction:
Improvetemperature control precisionVSAvoidcontrol system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system continuously monitors temperature, humidity, and other environmental parameters through addressable sensors and controllers. This data is fed back to the control algorithm, which automatically adjusts system operation to maintain desired setpoints. The feedback loop enables precise environmental control while the distributed architecture keeps individual device complexity manageable.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The control system dynamically adapts its behavior based on real-time conditions. Controllers can adjust their operation modes, setpoints, and control strategies in response to changing environmental conditions, occupancy patterns, and system status, enabling precise control without requiring overly complex fixed algorithms in each device.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS8463443B2Memory recovery scheme and data structure in a heating, ventilation and air conditioning network
Publication Date: 2013.06.11 LENNOX IND INC
  • US8463443B2 patent drawing
  • US8463443B2 patent drawing
  • US8463443B2 patent drawing

AI summary

The disclosure provides systems and methods for conveying information between a communicating first device and a second coupled device of a HVAC network. In various embodiments, the method comprises checking a subnet of the HVAC network for both communicating device and a non-communicating device by the communicating first device. The method also comprises determining whether the second coupled device in a non-communicating device. The method further comprises allowing an installer to set parameters of the non-communicating device through employment of a manifest list of features used by the non-communicating device that is accessible by the communicating device.