Liquid temperature control apparatus comprising initial temperature dependent high power heater drive
US4467183A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1981 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Dec 15, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1912
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A liquid temperature control apparatus controllably heats a liquid from a temperature before a control to a desired reference temperature by varying the magnitude and/or application time period of a power for energizing a heater on the basis of a difference between a voltage corresponding to the actual temperature before a control and a reference voltage corresponding to the reference temperature. The parameter on which the magnitude and/or application time period of the heater power is to be based may be the sum of a first voltage differential between a voltage corresponding to the actual temperature before a control and the reference voltage and a second voltage differential between a voltage corresponding to an actual temperature after the start of a control and the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.