Temperature control method with simultaneous heating and cooling near the set-point
US5211713A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1991 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Jul 30, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2221/54
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature control method for controlling a temperature in a chamber comprises the steps of: providing heating means which can select large and small heating powers for heating the chamber and refrigerating means for cooling the chamber; detecting a process temperature in the chamber; operating the heating means with a small heating power for attaining an intended set value when a detected temperature is equal to or higher than a lower tolerable deviation value, and operating the heating means with a large heating power when the detected temperature is lower than the lower tolerable deviation value; and operating the refrigerating means when the detected temperature is higher than an upper tolerable deviation value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.