Diagnostic data bus for acquiring and communicating diagnostic information from HVAC systems
US10139122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2016 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Sep 15, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2110/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A diagnostic data collection device and a diagnostic data bus are disclosed. In an embodiment, the diagnostic data collection device includes a diagnostic communication interface and a flexible interface module. The interface module is configurable to measure one or more electrical properties associated with an HVAC component, such as voltage, current, resistance. Electrical properties may include a sensor output and may include analog and digital signals. The diagnostic data collection device generates an exception message if the sensed property is out of specification. Evaluation rules are provided to detect various types of failures, including transient failures, steady state failures, and trending failures. The diagnostic data collection device self-calibrates by recording electrical properties during normal operation of the HVAC equipment. A plurality of diagnostic data collection devices may be coupled by a diagnostic data bug independent of the HVAC system's control bus, to ensure operational integrity of the diagnostic system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.