04897798 is referenced by 162 patents and cites 11 patents.

This adaptive environment control system provides an HVAC control system that adapts to the continually-changing thermal characteristics of the building in which it operates. The adaptive environment control system periodically estimates the thermal characteristics of the building and uses these estimates to control the operation of the HVAC system. The adaptive environment control system also periodically measures the performance characteristics of the HVAC system to obtain data with which to update these thermal characteristic estimates. These thermal characteristic estimates enable the adaptive environment control system to determine both the length of time it takes the building to heat up and cool down when the HVAC system idles, as well as the amount of time it takes the HVAC system to heat or cool the building. These measurements and estimates are taken on a dynamic basis so that the adaptive environment control system responds to any changes in the environment, either within or without the building, including degradation of the operation of the HVAC system. The adaptive environment control system can calculate, through the estimates and measurements, the thermal performance of both the building and the HVAC system, so that the HVAC system is operational sufficiently early to maintain the building interior temperature within a predetermined range of the set-point threshold level of the thermostat.

Title
Adaptive environment control system
Application Number
6/939372
Publication Number
4897798
Application Date
December 8, 1986
Publication Date
January 30, 1990
Inventor
Lawrence J Cler
Broomfield
CO, US
Agent
David Volejnicek
Assignee
AT&T Information Systems
NJ, US
American Telephone and Telegraph Company
NY, US
IPC
F23N 5/20
G06F 15/20
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