Apparatus for maintaining liquid temperature at a constant level
US4984628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Jul 6, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/20
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An apparatus for maintaining liquid temperature at a constant level comprises a reaction vessel for containing liquid, a cooling device connected with the reaction vessel for cooling the liquid, a heating device connected with the cooling device for heating the liquid cooled by the cooling device, a circulating device for circulating the liquid through and among the reaction vessel, the cooling device and the heating device, a temperature detecting device for detecting the temperature of the liquid heated by the heating device, a heat exchange rate control device for controlling the heat exchange rate between the cooling device and the liquid, and a control device for controlling the heating device and the heat exchange rate control device based on a control state of the apparatus and on the temperature difference between the detected temperature and a desired temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.