Temperature control system using a single ramp rate curve for control of a multiplant environmental unit
US4702413A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1987 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | May 7, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1919
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A temperature control system for a multiplant environmental unit such as a heat pump with auxiliary heat is disclosed. The control system utilizes a thermostat having a microprocessor and memory that allows for energy savings through setback functions. The setback functions return the temperature control from a setback temperature to a normal comfort temperature along a ramped rate that is modified from day to day. The purpose of this variable ramp is to minimize the operation of the auxliary heat and maximize shell savings (by starting as late as possible). This is basically accomplished by locking the heat pump on in certain cases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.