Hybrid finite state machine environmental system controller
US6408228B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1999 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Aug 13, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2011/0006
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The present invention provides a sequencing control strategy for environmental system controllers that takes better advantage of the capabilities of the system elements to enhance performance and reduce operating costs. Digital controller technology is included and operates in accordance with a state transition diagram clarifying conditions that must exist for the environmental controller to switch from one mode of operation to another (e.g., from a cooling mode with dampers set at the minimum position to a cooling mode with the dampers modulating to reduce the energy used for mechanical cooling). Several a controllers, or a single controller operating on several sets of control parameters, sequentially operate in accordance with transition data and system performance characteristics for controlling system operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.