Temperature control system for electric fluid heater
US4093847A · kind A · utility
19Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Mar 19, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An electric fluid heater of the type in which the fluid is heated by passing electricity through it includes an electronic temperature control system responsive to a temperature sensor in the fluid for controlling the flow of electric current to the heating electrodes. The electronic controller includes means to limit the maximum current passed by the heating electrodes. Heat generated is controlled to demand by varying the duty cycle of back-to-back SCR's in series with one of the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.