Demand limit control by integral reset of thermostats
US4656835A · kind A · utility
79Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/244
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A temperature control system for a building is disclosed utilizing a central demand limit controller. The system includes a number of control modules or thermostats that have both proportional error and integral error functions. The integral error is reset at intervals by an interstage differential to drop single stages of air conditioning. This reduces demand until the maximum allowed demand is met. The integral error function is a timed function and the stages return in a random manner to restore setpoint temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.